2022 |
Mancinelli, Giorgio; Dailianis, Thanos; Dounas, Costas; Kasapidis, Panagiotis; Koulouri, Panayota; Skouradakis, Grigorios; Bardelli, Roberta; Muri, Cristina Di; Guerra, Maria Teresa; Vizzini, Salvatrice Sustainability, 14 (22), pp. 15202, 2022, ISSN: 2071-1050. @article{mancinelli_isotopic_2022, title = {Isotopic Niche and Trophic Position of the Invasive Portunid Portunus segnis Forskål, (1775) in Elounda Bay (Crete Island, Eastern Mediterranean)}, author = {Giorgio Mancinelli and Thanos Dailianis and Costas Dounas and Panagiotis Kasapidis and Panayota Koulouri and Grigorios Skouradakis and Roberta Bardelli and Cristina Di Muri and Maria Teresa Guerra and Salvatrice Vizzini}, url = {https://imbbc.hcmr.gr/wp-content/uploads/2022/11/2022-Mancinelli-Sustain-77.pdf https://www.mdpi.com/2071-1050/14/22/15202}, doi = {10.3390/su142215202}, issn = {2071-1050}, year = {2022}, date = {2022-11-21}, urldate = {2022-11-21}, journal = {Sustainability}, volume = {14}, number = {22}, pages = {15202}, abstract = {There is a growing recognition that an advanced understanding of the trophic characteristics of an invasive consumer can provide important information on its ecological impact. In recent years, the blue swimming crab Portunus segnis, one of the earliest Lessepsian invaders, has considerably expanded its distribution range in the Mediterranean Sea, yet, its trophic habits in invaded areas remain scarcely investigated. In this study, we used carbon and nitrogen stable isotopes analysis (SIA) to determine the trophic position and isotopic niche of the crab compared with other representatives of the flora and fauna occurring in Elounda Bay (Crete). P. segnis showed a trophic position of 3.9, higher than the values determined by SIA or conventional gut content analysis in other areas of the Mediterranean Sea or in the native range. Crab specimens showed a high inter-individual variability in both δ13C and δ15N values; further analysis indicated negligible differences in the isotopic niche of adult males and females. Conversely, δ15N values were significantly related to the size of the specimens, ultimately suggesting an ontogenetic dietary shift. This study represents the first attempt to characterize the trophic habits of the blue swimming crab in the context of an invaded food web and may contribute to the implementation of long-term management strategies of control and mitigation of its ecological impact.}, keywords = {}, pubstate = {published}, tppubtype = {article} } There is a growing recognition that an advanced understanding of the trophic characteristics of an invasive consumer can provide important information on its ecological impact. In recent years, the blue swimming crab Portunus segnis, one of the earliest Lessepsian invaders, has considerably expanded its distribution range in the Mediterranean Sea, yet, its trophic habits in invaded areas remain scarcely investigated. In this study, we used carbon and nitrogen stable isotopes analysis (SIA) to determine the trophic position and isotopic niche of the crab compared with other representatives of the flora and fauna occurring in Elounda Bay (Crete). P. segnis showed a trophic position of 3.9, higher than the values determined by SIA or conventional gut content analysis in other areas of the Mediterranean Sea or in the native range. Crab specimens showed a high inter-individual variability in both δ13C and δ15N values; further analysis indicated negligible differences in the isotopic niche of adult males and females. Conversely, δ15N values were significantly related to the size of the specimens, ultimately suggesting an ontogenetic dietary shift. This study represents the first attempt to characterize the trophic habits of the blue swimming crab in the context of an invaded food web and may contribute to the implementation of long-term management strategies of control and mitigation of its ecological impact. |
Rallis, Ioannis; Chatzigeorgiou, Giorgos; Florido, Marta; Sedano, Francisco; Procopiou, Avgi; Chertz-Bynichaki, Melina; Vernadou, Emmanouela; Plaiti, Wanda; Koulouri, Panayota; Dounas, Costas; Gerovasileiou, Vasilis; Dailianis, Thanos Early Succession Patterns of Benthic Assemblages on Artificial Reefs in the Oligotrophic Eastern Mediterranean Basin Journal Article Journal of Marine Science and Engineering, 10 (5), pp. 620, 2022, ISSN: 2077-1312. @article{rallis_early_2022, title = {Early Succession Patterns of Benthic Assemblages on Artificial Reefs in the Oligotrophic Eastern Mediterranean Basin}, author = {Ioannis Rallis and Giorgos Chatzigeorgiou and Marta Florido and Francisco Sedano and Avgi Procopiou and Melina Chertz-Bynichaki and Emmanouela Vernadou and Wanda Plaiti and Panayota Koulouri and Costas Dounas and Vasilis Gerovasileiou and Thanos Dailianis}, url = {https://imbbc.hcmr.gr/wp-content/uploads/2022/05/2022-Rallis-jmse-35.pdf https://www.mdpi.com/2077-1312/10/5/620}, doi = {10.3390/jmse10050620}, issn = {2077-1312}, year = {2022}, date = {2022-05-01}, urldate = {2022-05-09}, journal = {Journal of Marine Science and Engineering}, volume = {10}, number = {5}, pages = {620}, abstract = {The colonization of artificial structures by benthic organisms in the marine realm is known to be affected by the general trophic patterns of the biogeographical zone and the prevailing environmental traits at the local scale. The present work aims to present quantitative data on the early settlement progress of macrofaunal benthic assemblages developing on artificial reefs (ARs) deployed at the Underwater Biotechnological Park of Crete (UBPC) in the oligotrophic Eastern Mediterranean. Visual census and subsequent image analysis combined with scraped quadrats were used to describe the establishment of the communities and their development over three consecutive campaigns, spanning 5 years post-deployment. Macroalgae consistently dominated in terms of coverage, while sessile invertebrates displayed different patterns over the years. Polychaeta and Bryozoa were gradually replaced by Cnidaria, while Porifera and Mollusca displayed an increasing trend over the years. Motile benthos was mainly represented by Mollusca, while the abundance of Polychaeta increased in contrast to that of Crustacea. For both sessile and motile assemblages, significant differences were observed among the years. The results of this study indicate that ecological succession is still ongoing, and further improvement in the monitoring methodology can assist towards a more accurate assessment of the community composition in complex AR structures.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The colonization of artificial structures by benthic organisms in the marine realm is known to be affected by the general trophic patterns of the biogeographical zone and the prevailing environmental traits at the local scale. The present work aims to present quantitative data on the early settlement progress of macrofaunal benthic assemblages developing on artificial reefs (ARs) deployed at the Underwater Biotechnological Park of Crete (UBPC) in the oligotrophic Eastern Mediterranean. Visual census and subsequent image analysis combined with scraped quadrats were used to describe the establishment of the communities and their development over three consecutive campaigns, spanning 5 years post-deployment. Macroalgae consistently dominated in terms of coverage, while sessile invertebrates displayed different patterns over the years. Polychaeta and Bryozoa were gradually replaced by Cnidaria, while Porifera and Mollusca displayed an increasing trend over the years. Motile benthos was mainly represented by Mollusca, while the abundance of Polychaeta increased in contrast to that of Crustacea. For both sessile and motile assemblages, significant differences were observed among the years. The results of this study indicate that ecological succession is still ongoing, and further improvement in the monitoring methodology can assist towards a more accurate assessment of the community composition in complex AR structures. |
Skouradakis, Grigorios; Dounas, Costas; Androulakis, Dimitrios N; Papadaki, Maria; Koulouri, Panayota; Pavlidis, Michail A Study of Arca noae (Linnaeus, 1758) in Elounda Bay, Crete, Eastern Mediterranean Journal Article Journal of Marine Science and Engineering, 10 (5), pp. 673, 2022, ISSN: 2077-1312. @article{skouradakis_study_2022, title = {A Study of Arca noae (Linnaeus, 1758) in Elounda Bay, Crete, Eastern Mediterranean}, author = {Grigorios Skouradakis and Costas Dounas and Dimitrios N Androulakis and Maria Papadaki and Panayota Koulouri and Michail Pavlidis}, url = {https://imbbc.hcmr.gr/wp-content/uploads/2022/07/2022-Skouradakis-jmse-38.pdf https://www.mdpi.com/2077-1312/10/5/673}, doi = {10.3390/jmse10050673}, issn = {2077-1312}, year = {2022}, date = {2022-05-01}, urldate = {2022-07-29}, journal = {Journal of Marine Science and Engineering}, volume = {10}, number = {5}, pages = {673}, abstract = {There is growing interest about marine bivalve aquaculture globally, not only for the market value of the goods produced, but also for the socio-economic and environmental services that this activity can provide. Arca noae is an endemic Mediterranean bivalve of commercial value, whose previously undescribed population in Elounda Bay we studied in terms of its structure and reproduction, while constructing a timeseries of the basic environmental parameters of the bay, thus, gaining fundamental knowledge for the potential future exploitation of the species in the area. We found a variable spatial distribution of arks in the study area, with local high peaks in the population density, consisting of smaller size individuals, in comparison to other areas. Because of protandry of the species, human pressure on this population could have a strong negative effect, by targeting the limited numbers of large females in the study area. The reproduction pattern was similar to the reports from other Mediterranean locations. The abiotic conditions in Elounda Bay differed from those in the adjacent coastal zone, confirming that the Bay is a unique semi-enclosed marine area in the island of Crete.}, keywords = {}, pubstate = {published}, tppubtype = {article} } There is growing interest about marine bivalve aquaculture globally, not only for the market value of the goods produced, but also for the socio-economic and environmental services that this activity can provide. Arca noae is an endemic Mediterranean bivalve of commercial value, whose previously undescribed population in Elounda Bay we studied in terms of its structure and reproduction, while constructing a timeseries of the basic environmental parameters of the bay, thus, gaining fundamental knowledge for the potential future exploitation of the species in the area. We found a variable spatial distribution of arks in the study area, with local high peaks in the population density, consisting of smaller size individuals, in comparison to other areas. Because of protandry of the species, human pressure on this population could have a strong negative effect, by targeting the limited numbers of large females in the study area. The reproduction pattern was similar to the reports from other Mediterranean locations. The abiotic conditions in Elounda Bay differed from those in the adjacent coastal zone, confirming that the Bay is a unique semi-enclosed marine area in the island of Crete. |
Koulouri, Panayota; Mogias, Athanasios; Dounas, Costas A Pilot Survey Investigating Naturoid Reefs as a Tool for Sustainable Marine Ecotourism Journal Article Journal of Marine Science and Engineering, 10 (8), pp. 1080, 2022, ISSN: 2077-1312. @article{koulouri_pilot_2022, title = {A Pilot Survey Investigating Naturoid Reefs as a Tool for Sustainable Marine Ecotourism}, author = {Panayota Koulouri and Athanasios Mogias and Costas Dounas}, url = {https://imbbc.hcmr.gr/wp-content/uploads/2022/08/2022-Koulouri-jmse-56.pdf https://www.mdpi.com/2077-1312/10/8/1080}, doi = {10.3390/jmse10081080}, issn = {2077-1312}, year = {2022}, date = {2022-01-01}, urldate = {2022-08-26}, journal = {Journal of Marine Science and Engineering}, volume = {10}, number = {8}, pages = {1080}, abstract = {Recreational SCUBA diving is currently a nature-based USD multibillion tourism industry across the globe. However, degradation of many recreational diving destinations all over the world due to “soft” ecotourists necessitates the adoption of innovative management measures. Hellenic Centre for Marine Research (HCMR) developed an innovative technology for the creation of artificial underwater ecotourism attractions (“oases”) to divert visitors away from sensitive marine natural areas of high ecological and aesthetic value. This innovative technology includes specially constructed artificial reefs in an attempt to simulate the functional and morphological characteristics and the aesthetics of the natural rocky reefs. In this study, a pilot survey was conducted in three diving centres of Crete Island, one of the most important tourist destinations in the Mediterranean Sea, involving the participation of 144 SCUBA divers from all over the world. The survey aimed at investigating SCUBA divers’ profiles and perceptions concerning recreational diving activities and artificial reefs technology. Findings of this study indicate that large naval shipwrecks combined with innovative man-fabricated constructions simulating natural rocky reefs meet the preferences of the majority of the participants of the survey and they can be used as an alternative tool for relevant marine ecotourism sustainable applications.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Recreational SCUBA diving is currently a nature-based USD multibillion tourism industry across the globe. However, degradation of many recreational diving destinations all over the world due to “soft” ecotourists necessitates the adoption of innovative management measures. Hellenic Centre for Marine Research (HCMR) developed an innovative technology for the creation of artificial underwater ecotourism attractions (“oases”) to divert visitors away from sensitive marine natural areas of high ecological and aesthetic value. This innovative technology includes specially constructed artificial reefs in an attempt to simulate the functional and morphological characteristics and the aesthetics of the natural rocky reefs. In this study, a pilot survey was conducted in three diving centres of Crete Island, one of the most important tourist destinations in the Mediterranean Sea, involving the participation of 144 SCUBA divers from all over the world. The survey aimed at investigating SCUBA divers’ profiles and perceptions concerning recreational diving activities and artificial reefs technology. Findings of this study indicate that large naval shipwrecks combined with innovative man-fabricated constructions simulating natural rocky reefs meet the preferences of the majority of the participants of the survey and they can be used as an alternative tool for relevant marine ecotourism sustainable applications. |
2021 |
Maidanou, Maria; Koulouri, Panayota; Karachle, Paraskevi K; Arvanitidis, Christos; Koutsoubas, Drosos; Dounas, Costas Trophic Diversity of a Fish Community Associated with a Caulerpa prolifera (Forsskål) Meadow in a Shallow Semi-Enclosed Embayment Journal Article JMSE, 9 (2), pp. 165, 2021, ISSN: 2077-1312. @article{maidanou_trophic_2021, title = {Trophic Diversity of a Fish Community Associated with a Caulerpa prolifera (Forsskål) Meadow in a Shallow Semi-Enclosed Embayment}, author = {Maria Maidanou and Panayota Koulouri and Paraskevi K Karachle and Christos Arvanitidis and Drosos Koutsoubas and Costas Dounas}, url = {https://imbbc.hcmr.gr/wp-content/uploads/2021/02/2021-Maidanou-JMSE-12.pdf https://www.mdpi.com/2077-1312/9/2/165}, doi = {10.3390/jmse9020165}, issn = {2077-1312}, year = {2021}, date = {2021-01-01}, urldate = {2021-02-24}, journal = {JMSE}, volume = {9}, number = {2}, pages = {165}, abstract = {This study investigates the trophic diversity of fishes living in a meadow of Caulerpa prolifera on a bimonthly basis between May 2006 and April 2007 in a semi-enclosed coastal marine ecosystem of the Mediterranean Sea (Elounda Bay, Crete Island). The study area is shallow and protected from waves, and it is covered by a C. prolifera bed, characterized by high organic input and a highly diverse macrobenthic community. Feeding patterns of the fish, investigated on the basis of stomach content analyses, were described in terms of numerical abundance and frequency of occurrence of prey taxa. A total of 1642 fish individuals, belonging to 17 species, were examined. In total, 45,674 prey individuals were identified belonging to 110 prey taxa, most of which were Malacostraca including their larvae and Copepoda (41,175 individuals identified to 71 taxa). Four different trophic groups were identified: herbivorous, pelagic, benthic (hyperbenthic) and piscivorous. Trophic diversity patterns of the fish species studied were also compared to the relative availability of macrobenthic and zooplanktonic taxa during the same period in the study area. The coexistence of many different, mostly benthic but also pelagic, fishes and their juveniles implies their high trophic flexibility, which is probably important for their survival in this particular habitat. Results of the present study provide basic knowledge on trophic diversity and interactions in the marine ecosystem and, therefore, some evidence as to the protection value of this particular habitat, which is essential for the implementation of a multispecies approach to decision-makers and managers of fisheries sources of the region.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This study investigates the trophic diversity of fishes living in a meadow of Caulerpa prolifera on a bimonthly basis between May 2006 and April 2007 in a semi-enclosed coastal marine ecosystem of the Mediterranean Sea (Elounda Bay, Crete Island). The study area is shallow and protected from waves, and it is covered by a C. prolifera bed, characterized by high organic input and a highly diverse macrobenthic community. Feeding patterns of the fish, investigated on the basis of stomach content analyses, were described in terms of numerical abundance and frequency of occurrence of prey taxa. A total of 1642 fish individuals, belonging to 17 species, were examined. In total, 45,674 prey individuals were identified belonging to 110 prey taxa, most of which were Malacostraca including their larvae and Copepoda (41,175 individuals identified to 71 taxa). Four different trophic groups were identified: herbivorous, pelagic, benthic (hyperbenthic) and piscivorous. Trophic diversity patterns of the fish species studied were also compared to the relative availability of macrobenthic and zooplanktonic taxa during the same period in the study area. The coexistence of many different, mostly benthic but also pelagic, fishes and their juveniles implies their high trophic flexibility, which is probably important for their survival in this particular habitat. Results of the present study provide basic knowledge on trophic diversity and interactions in the marine ecosystem and, therefore, some evidence as to the protection value of this particular habitat, which is essential for the implementation of a multispecies approach to decision-makers and managers of fisheries sources of the region. |
Koulouri, Panayota; Giannoulaki, Marianna; Machias, Athanasios; Dounas, Costas Ksibi, Mohamed; Ghorbal, Achraf; Chakraborty, Sudip; Chaminé, Helder I; Barbieri, Maurizio; Guerriero, Giulia; Hentati, Olfa; Negm, Abdelazim; Lehmann, Anthony; Römbke, Jörg; Duarte, Armando Costa; Xoplaki, Elena; Khélifi, Nabil; Colinet, Gilles; Dias, João Miguel; Gargouri, Imed; Hullebusch, Eric Van D; Cabrero, Benigno Sánchez; Ferlisi, Settimio; Tizaoui, Chedly; Kallel, Amjad; Rtimi, Sami; Panda, Sandeep; Michaud, Philippe; Sahu, Jaya Narayana; Seffen, Mongi; Naddeo, Vincenzo (Ed.): Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions (2nd Edition), pp. 2197–2201, Springer International Publishing, Cham, 2021, ISBN: 978-3-030-51209-5 978-3-030-51210-1, (BIODIV). @incollection{ksibi_measures_2021, title = {Measures for the Protection and Sustainable Exploitation of Marine Biological Resources in an Oligotrophic Fishing Ground (Crete Island, Greece, E. Mediterranean)}, author = {Panayota Koulouri and Marianna Giannoulaki and Athanasios Machias and Costas Dounas}, editor = {Mohamed Ksibi and Achraf Ghorbal and Sudip Chakraborty and Helder I Chaminé and Maurizio Barbieri and Giulia Guerriero and Olfa Hentati and Abdelazim Negm and Anthony Lehmann and Jörg Römbke and Armando Costa Duarte and Elena Xoplaki and Nabil Khélifi and Gilles Colinet and João Miguel Dias and Imed Gargouri and Eric D Van Hullebusch and Benigno Sánchez Cabrero and Settimio Ferlisi and Chedly Tizaoui and Amjad Kallel and Sami Rtimi and Sandeep Panda and Philippe Michaud and Jaya Narayana Sahu and Mongi Seffen and Vincenzo Naddeo}, url = {http://link.springer.com/10.1007/978-3-030-51210-1_344}, isbn = {978-3-030-51209-5 978-3-030-51210-1}, year = {2021}, date = {2021-01-01}, urldate = {2022-01-17}, booktitle = {Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions (2nd Edition)}, pages = {2197--2201}, publisher = {Springer International Publishing}, address = {Cham}, note = {BIODIV}, keywords = {}, pubstate = {published}, tppubtype = {incollection} } |
Gerovasileiou, Vasilis; Koulouri, Panayota; Koutsikopoulos, C; Dailianis, Thanos; Dounas, Costas; Salomidi, Maria; Trygonis, Vasilis; Karris, G; Raitsos, Dionysios E; Dimitriadis, Charalampos; Sini, Maria; Poursanidis, Dimitris; Sourbes, Laurent; Koutsoubas, Drosos Chapter 23. Marine Biodiversity in Greek Seas Incollection Marine Biology, Broken Hill Publishers Ltd., 2021. @incollection{gerovasileiou_chapter_2021, title = {Chapter 23. Marine Biodiversity in Greek Seas}, author = {Vasilis Gerovasileiou and Panayota Koulouri and C Koutsikopoulos and Thanos Dailianis and Costas Dounas and Maria Salomidi and Vasilis Trygonis and G Karris and Dionysios E Raitsos and Charalampos Dimitriadis and Maria Sini and Dimitris Poursanidis and Laurent Sourbes and Drosos Koutsoubas}, year = {2021}, date = {2021-01-01}, booktitle = {Marine Biology}, publisher = {Broken Hill Publishers Ltd.}, keywords = {}, pubstate = {published}, tppubtype = {incollection} } |
2020 |
Correia, Miguel; Paulo, Diogo; Samara, Elina; Koulouri, Panayota; Mentogiannis, Vasilis; Dounas, Costas Journal of Fish Biology, 97 (1), pp. 314–317, 2020, ISSN: 0022-1112, 1095-8649. @article{correia_field_2020, title = {Field studies of seahorse population density, structure and habitat use in a semi‐closed north‐eastern Mediterranean marine area (Stratoni, North Aegean Sea)}, author = {Miguel Correia and Diogo Paulo and Elina Samara and Panayota Koulouri and Vasilis Mentogiannis and Costas Dounas}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/jfb.14371}, doi = {10.1111/jfb.14371}, issn = {0022-1112, 1095-8649}, year = {2020}, date = {2020-07-01}, urldate = {2020-08-31}, journal = {Journal of Fish Biology}, volume = {97}, number = {1}, pages = {314--317}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Androulakis, Dimitrios N; Banks, Andrew Clive; Dounas, Costas; Margaris, Dionissios P Remote Sensing, 12 (7), pp. 1140, 2020, ISSN: 2072-4292, (BIODIV). @article{androulakis_evaluation_2020, title = {An Evaluation of Autonomous In Situ Temperature Loggers in a Coastal Region of the Eastern Mediterranean Sea for Use in the Validation of Near-Shore Satellite Sea Surface Temperature Measurements}, author = {Dimitrios N Androulakis and Andrew Clive Banks and Costas Dounas and Dionissios P Margaris}, url = {https://www.mdpi.com/2072-4292/12/7/1140}, doi = {10.3390/rs12071140}, issn = {2072-4292}, year = {2020}, date = {2020-04-01}, urldate = {2022-01-17}, journal = {Remote Sensing}, volume = {12}, number = {7}, pages = {1140}, abstract = {The coastal ocean is one of the most important environments on our planet, home to some of the most bio-diverse and productive ecosystems and providing key input to the livelihood of the majority of human society. It is also a highly dynamic and sensitive environment, particularly susceptible to damage from anthropogenic influences such as pollution and over-exploitation as well as the effects of climate change. These have the added potential to exacerbate other anthropogenic effects and the recent change in sea temperature can be considered as the most pervasive and severe cause of impact in coastal ecosystems worldwide. In addition to open ocean measurements, satellite observations of sea surface temperature (SST) have the potential to provide accurate synoptic coverage of this essential climate variable for the near-shore coastal ocean. However, this potential has not been fully realized, mainly because of a lack of reliable in situ validation data, and the contamination of near-shore measurements by the land. The underwater biotechnological park of Crete (UBPC) has been taking near surface temperature readings autonomously since 2014. Therefore, this study investigated the potential for this infrastructure to be used to validate SST measurements of the near-shore coastal ocean. A comparison between in situ data and Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua and Terra SST data is presented for a four year (2014–2018) in situ time series recorded from the UBPC. For matchups between in situ and satellite SST data, only nighttime in situ extrapolated to the sea surface (SSTskin) data within ±1 h from the satellite’s overpass are selected and averaged. A close correlation between the in situ data and the MODIS SST was found (squared Pearson correlation coefficient-r2 textgreater 0.9689, mean absolute error-Δ textless 0.51 both for Aqua and Terra products). Moreover, close correlation was found between the satellite data and their adjacent satellite pixel’s data further from the shore (r2 textgreater 0.9945, Δ textless 0.23 for both Aqua and Terra products, daytime and nighttime satellite SST). However, there was also a consistent positive systematic difference in the satellite against satellite mean biases indicating a thermal adjacency effect from the land (e.g., mean bias between daytime Aqua satellite SST from the UBPC cell minus the respective adjacent cell’s data is δ = 0.02). Nevertheless, if improvements are made in the in situ sensors and their calibration and uncertainty evaluation, these initial results indicate that near-shore autonomous coastal underwater temperature arrays, such as the one at UBPC, could in the future provide valuable in situ data for the validation of satellite coastal SST measurements.}, note = {BIODIV}, keywords = {}, pubstate = {published}, tppubtype = {article} } The coastal ocean is one of the most important environments on our planet, home to some of the most bio-diverse and productive ecosystems and providing key input to the livelihood of the majority of human society. It is also a highly dynamic and sensitive environment, particularly susceptible to damage from anthropogenic influences such as pollution and over-exploitation as well as the effects of climate change. These have the added potential to exacerbate other anthropogenic effects and the recent change in sea temperature can be considered as the most pervasive and severe cause of impact in coastal ecosystems worldwide. In addition to open ocean measurements, satellite observations of sea surface temperature (SST) have the potential to provide accurate synoptic coverage of this essential climate variable for the near-shore coastal ocean. However, this potential has not been fully realized, mainly because of a lack of reliable in situ validation data, and the contamination of near-shore measurements by the land. The underwater biotechnological park of Crete (UBPC) has been taking near surface temperature readings autonomously since 2014. Therefore, this study investigated the potential for this infrastructure to be used to validate SST measurements of the near-shore coastal ocean. A comparison between in situ data and Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua and Terra SST data is presented for a four year (2014–2018) in situ time series recorded from the UBPC. For matchups between in situ and satellite SST data, only nighttime in situ extrapolated to the sea surface (SSTskin) data within ±1 h from the satellite’s overpass are selected and averaged. A close correlation between the in situ data and the MODIS SST was found (squared Pearson correlation coefficient-r2 textgreater 0.9689, mean absolute error-Δ textless 0.51 both for Aqua and Terra products). Moreover, close correlation was found between the satellite data and their adjacent satellite pixel’s data further from the shore (r2 textgreater 0.9945, Δ textless 0.23 for both Aqua and Terra products, daytime and nighttime satellite SST). However, there was also a consistent positive systematic difference in the satellite against satellite mean biases indicating a thermal adjacency effect from the land (e.g., mean bias between daytime Aqua satellite SST from the UBPC cell minus the respective adjacent cell’s data is δ = 0.02). Nevertheless, if improvements are made in the in situ sensors and their calibration and uncertainty evaluation, these initial results indicate that near-shore autonomous coastal underwater temperature arrays, such as the one at UBPC, could in the future provide valuable in situ data for the validation of satellite coastal SST measurements. |
Androulakis, Dimitrios N; Dounas, Costas G; Banks, Andrew Clive; Magoulas, Antonios N; Margaris, Dionissios P Sustainability, 12 (12), 2020, ISSN: 2071-1050. @article{androulakis_assessment_2020, title = {An Assessment of Computational Fluid Dynamics as a Tool to Aid the Design of the HCMR-Artificial-ReefsTM Diving Oasis in the Underwater Biotechnological Park of Crete}, author = {Dimitrios N Androulakis and Costas G Dounas and Andrew Clive Banks and Antonios N Magoulas and Dionissios P Margaris}, url = {https://www.mdpi.com/2071-1050/12/12/4847}, doi = {10.3390/su12124847}, issn = {2071-1050}, year = {2020}, date = {2020-01-01}, journal = {Sustainability}, volume = {12}, number = {12}, abstract = {Since recreational diving activities have increased in recent decades, resulting in additional environmental pressure on the coastal zone, the deployment of artificial reefs as a conservation strategy to divert mass ecotourism from fragile natural reefs has been proposed and realized in many areas of the world. Twelve units of a patented naturoid artificial reef technology developed by the Hellenic Centre for Marine Research (HCMR) were deployed in 2015 in the Underwater Biotechnological Park of Crete (UBPC) in order to create an experimental diving oasis and investigate the potential of achieving this aim for the over-exploited coastal ecosystems of this part of the Eastern Mediterranean. Assessment of the degree of establishment of artificial reefs and their ability to mimic natural ecosystems is often monitored through biological surveys and sampling. The measurement of the chemical, physical, and hydrodynamic characteristics of the water mass surrounding artificial reefs is also essential to fully understand their comparison to natural reefs. In particular, the flow field around reefs has been shown to be one of the most important physical factors in determining suitable conditions for the establishment of a number of key species on reef habitats. However, the combination of biological establishment monitoring and realistic flow-field simulation using computational fluid dynamics as a tool to aid in the design improvement of already existing reef installations has not been fully investigated in previous work. They are often reported separately as either ecological or engineering studies. Therefore, this study examined a full-scale numerical simulation of the field flow around individual already installed naturoid reef shapes, and part of their present arrangement on the sea bottom of the UPBC combined with the field-testing of the functionality of the installed artificial reefs concerning fish species aggregation. The results show that the simulated flow characteristics around the HCMR diving oasis artificial reefs were in good general agreement with the results of former studies, both for flows around a single deployed unit and for flows around a cluster of more than one unit. The results also gave good indications of the performance of individual reef units concerning key desirable characteristics such as downstream shadowing and sediment/nutrient upwelling and resuspension. In particular, they confirmed extended low flow levels (less than 0.3 m/s) and in some cases double vortexes on the downstream side of reef units where observed colonization and habitation of some key fish species had taken place. They also showed how the present distribution of units could be optimized to perform better as an integrated reef cluster. The use of computational fluid dynamics, with field survey data, is therefore suggested as a useful design improvement tool for installed reef structures and their deployment arrangement for recreational diving oases that can aid the sustainable development of the coastal zone.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Since recreational diving activities have increased in recent decades, resulting in additional environmental pressure on the coastal zone, the deployment of artificial reefs as a conservation strategy to divert mass ecotourism from fragile natural reefs has been proposed and realized in many areas of the world. Twelve units of a patented naturoid artificial reef technology developed by the Hellenic Centre for Marine Research (HCMR) were deployed in 2015 in the Underwater Biotechnological Park of Crete (UBPC) in order to create an experimental diving oasis and investigate the potential of achieving this aim for the over-exploited coastal ecosystems of this part of the Eastern Mediterranean. Assessment of the degree of establishment of artificial reefs and their ability to mimic natural ecosystems is often monitored through biological surveys and sampling. The measurement of the chemical, physical, and hydrodynamic characteristics of the water mass surrounding artificial reefs is also essential to fully understand their comparison to natural reefs. In particular, the flow field around reefs has been shown to be one of the most important physical factors in determining suitable conditions for the establishment of a number of key species on reef habitats. However, the combination of biological establishment monitoring and realistic flow-field simulation using computational fluid dynamics as a tool to aid in the design improvement of already existing reef installations has not been fully investigated in previous work. They are often reported separately as either ecological or engineering studies. Therefore, this study examined a full-scale numerical simulation of the field flow around individual already installed naturoid reef shapes, and part of their present arrangement on the sea bottom of the UPBC combined with the field-testing of the functionality of the installed artificial reefs concerning fish species aggregation. The results show that the simulated flow characteristics around the HCMR diving oasis artificial reefs were in good general agreement with the results of former studies, both for flows around a single deployed unit and for flows around a cluster of more than one unit. The results also gave good indications of the performance of individual reef units concerning key desirable characteristics such as downstream shadowing and sediment/nutrient upwelling and resuspension. In particular, they confirmed extended low flow levels (less than 0.3 m/s) and in some cases double vortexes on the downstream side of reef units where observed colonization and habitation of some key fish species had taken place. They also showed how the present distribution of units could be optimized to perform better as an integrated reef cluster. The use of computational fluid dynamics, with field survey data, is therefore suggested as a useful design improvement tool for installed reef structures and their deployment arrangement for recreational diving oases that can aid the sustainable development of the coastal zone. |
KOUKOUNARI, IOLI; PARASKEVOPOULOU, VASSILIKI; KARDITSA, AIKATERINI; KOULOURI, PANAYOTA; POULOS, SERAFEIM; DOUNAS, COSTAS; DASSENAKIS, MANOS Trace metal concentrations in the offshore surficial sediment of the Heraklio Gulf (Crete Island, East Mediterranean Sea) Journal Article Mediterranean Marine Science, 21 (1), pp. 84–104, 2020, ISSN: 1791-6763. @article{koukounari_trace_2020, title = {Trace metal concentrations in the offshore surficial sediment of the Heraklio Gulf (Crete Island, East Mediterranean Sea)}, author = {IOLI KOUKOUNARI and VASSILIKI PARASKEVOPOULOU and AIKATERINI KARDITSA and PANAYOTA KOULOURI and SERAFEIM POULOS and COSTAS DOUNAS and MANOS DASSENAKIS}, url = {https://ejournals.epublishing.ekt.gr/index.php/hcmr-med-mar-sc/article/view/20396}, doi = {10.12681/mms.20396}, issn = {1791-6763}, year = {2020}, date = {2020-01-01}, journal = {Mediterranean Marine Science}, volume = {21}, number = {1}, pages = {84--104}, abstract = {The present study investigates the distribution of trace metals (Fe, Mn, Cr, Zn, Pb, Cu and Al), as indicators of pollution, in the surficial inner shelf sediments along the northern coast of Heraklio Gulf (Crete Island). Despite the fact that Heraklio Gulf is an industrialized urban area, hosting the third most important commercial harbour in Greece, the levels of trace metals in sediments are not exceedingly high. According to Sediment Quality Guidelines (SQG’s), the sediments are considered unpolluted with low probability of adverse effects to biota in the case of Cu, Zn and Pb, while moderately to heavily polluted only in the case of Cr. Moreover, Zn, Cu and Pb concentrations are lower than those measured in a previous study (1989). This improvement of environmental state in the study area is a response to more effective control of terrestrial pollution sources, following the enforcement of the Directive 91/271/EEC (as amended by Directive 98/15/EU) on urban wastewater treatment and disposal into Greek national legislation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The present study investigates the distribution of trace metals (Fe, Mn, Cr, Zn, Pb, Cu and Al), as indicators of pollution, in the surficial inner shelf sediments along the northern coast of Heraklio Gulf (Crete Island). Despite the fact that Heraklio Gulf is an industrialized urban area, hosting the third most important commercial harbour in Greece, the levels of trace metals in sediments are not exceedingly high. According to Sediment Quality Guidelines (SQG’s), the sediments are considered unpolluted with low probability of adverse effects to biota in the case of Cu, Zn and Pb, while moderately to heavily polluted only in the case of Cr. Moreover, Zn, Cu and Pb concentrations are lower than those measured in a previous study (1989). This improvement of environmental state in the study area is a response to more effective control of terrestrial pollution sources, following the enforcement of the Directive 91/271/EEC (as amended by Directive 98/15/EU) on urban wastewater treatment and disposal into Greek national legislation. |
Koulouri, Panayota; Gerovasileiou, Vasilis; Bailly, Nicolas; Dounas, Costas Tanaidacea of Greece: a preliminary checklist Journal Article Biodiversity Data Journal, 8 , pp. e47184, 2020, ISSN: 1314-2836, (Publisher: Pensoft Publishers _eprint: https://doi.org/10.3897/BDJ.8.e47184). @article{koulouri_tanaidacea_2020, title = {Tanaidacea of Greece: a preliminary checklist}, author = {Panayota Koulouri and Vasilis Gerovasileiou and Nicolas Bailly and Costas Dounas}, url = {https://doi.org/10.3897/BDJ.8.e47184}, doi = {10.3897/BDJ.8.e47184}, issn = {1314-2836}, year = {2020}, date = {2020-01-01}, journal = {Biodiversity Data Journal}, volume = {8}, pages = {e47184}, note = {Publisher: Pensoft Publishers _eprint: https://doi.org/10.3897/BDJ.8.e47184}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Koulouri, Panayota; Gerovasileiou, Vasilis; Bailly, Nicolas; Dounas, Costas Stomatopoda of Greece: an annotated checklist Journal Article Biodiversity Data Journal, 8 , pp. e47183, 2020, ISSN: 1314-2836, (Publisher: Pensoft Publishers _eprint: https://doi.org/10.3897/BDJ.8.e47183). @article{koulouri_stomatopoda_2020, title = {Stomatopoda of Greece: an annotated checklist}, author = {Panayota Koulouri and Vasilis Gerovasileiou and Nicolas Bailly and Costas Dounas}, url = {https://doi.org/10.3897/BDJ.8.e47183}, doi = {10.3897/BDJ.8.e47183}, issn = {1314-2836}, year = {2020}, date = {2020-01-01}, journal = {Biodiversity Data Journal}, volume = {8}, pages = {e47183}, note = {Publisher: Pensoft Publishers _eprint: https://doi.org/10.3897/BDJ.8.e47183}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Koutsouveli, Vasiliki; Manousaki, Tereza; Riesgo, Ana; Lagnel, Jacques; Kollias, Spyros; Tsigenopoulos, Costas S; Arvanitidis, Christos; Dounas, Costas; Magoulas, Antonios; Dailianis, Thanos Frontiers in Marine Science, 6 , pp. 786, 2020, ISSN: 2296-7745. @article{koutsouveli_gearing_2020, title = {Gearing Up for Warmer Times: Transcriptomic Response of Spongia officinalis to Elevated Temperatures Reveals Recruited Mechanisms and Potential for Resilience}, author = {Vasiliki Koutsouveli and Tereza Manousaki and Ana Riesgo and Jacques Lagnel and Spyros Kollias and Costas S Tsigenopoulos and Christos Arvanitidis and Costas Dounas and Antonios Magoulas and Thanos Dailianis}, url = {https://www.frontiersin.org/article/10.3389/fmars.2019.00786/full}, doi = {10.3389/fmars.2019.00786}, issn = {2296-7745}, year = {2020}, date = {2020-01-01}, urldate = {2020-08-06}, journal = {Frontiers in Marine Science}, volume = {6}, pages = {786}, abstract = {The emblematic sponge Spongia officinalis is currently threatened by recurrent mortality incidents in its native habitats. Elevated temperature has been indicated as a major triggering factor, but the molecular mechanisms recruited for the organism’s response to thermal shifts are yet unknown. Here, we experimentally tested the effect of exposure to temperatures of varying intensity and span on its gene expression profile, replicating gradients encountered in the species’ native habitat. Analysis revealed major shifts in the organism’s transcriptomic profile induced by temperatures corresponding to the standard seasonal maximum, triggering processes related to signal transduction, inflammation, and apoptotic pathway. Further elevation of temperature corresponding to local extremes activated further the immune response of the sponge along with protein ubiquitination. Following prolonged exposure, activation of endoplasmic reticulum stress related to accumulation of misfolded proteins and signs of resilience were observed. In the latter condition, categories such as cellular response to stress, wound repair, and diminution of pathological inflammation as also genes related to cell regeneration and cell growth were upregulated. Our results highlight the acknowledged sensitivity of S. officinalis to environmental shifts, providing an insight into the molecular mechanisms involved in the process. Furthermore, they suggest innate capacity for resilience at the current thermal extremes, implying a combination of factors and not temperature per se as the lethal agent. This sheds light on the mechanisms of pressure induced by the ongoing ocean warming trend to coastal sessile invertebrates.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The emblematic sponge Spongia officinalis is currently threatened by recurrent mortality incidents in its native habitats. Elevated temperature has been indicated as a major triggering factor, but the molecular mechanisms recruited for the organism’s response to thermal shifts are yet unknown. Here, we experimentally tested the effect of exposure to temperatures of varying intensity and span on its gene expression profile, replicating gradients encountered in the species’ native habitat. Analysis revealed major shifts in the organism’s transcriptomic profile induced by temperatures corresponding to the standard seasonal maximum, triggering processes related to signal transduction, inflammation, and apoptotic pathway. Further elevation of temperature corresponding to local extremes activated further the immune response of the sponge along with protein ubiquitination. Following prolonged exposure, activation of endoplasmic reticulum stress related to accumulation of misfolded proteins and signs of resilience were observed. In the latter condition, categories such as cellular response to stress, wound repair, and diminution of pathological inflammation as also genes related to cell regeneration and cell growth were upregulated. Our results highlight the acknowledged sensitivity of S. officinalis to environmental shifts, providing an insight into the molecular mechanisms involved in the process. Furthermore, they suggest innate capacity for resilience at the current thermal extremes, implying a combination of factors and not temperature per se as the lethal agent. This sheds light on the mechanisms of pressure induced by the ongoing ocean warming trend to coastal sessile invertebrates. |
Angelakis, A N; Koulouri, P; Dounas, C; Tchobanoglous, G Evolution of urban waste- and storm-water management in the region of Crete, Greece: A preliminary assessment Journal Article Water Science and Technology, pp. wst2020305, 2020, ISSN: 0273-1223, 1996-9732. @article{angelakis_evolution_2020, title = {Evolution of urban waste- and storm-water management in the region of Crete, Greece: A preliminary assessment}, author = {A N Angelakis and P Koulouri and C Dounas and G Tchobanoglous}, url = {https://iwaponline.com/wst/article/doi/10.2166/wst.2020.305/75117/Evolution-of-urban-waste-and-stormwater-management https://imbbc.hcmr.gr/wp-content/uploads/2020/12/2020-Aggelakis-WST52-pre-print.pdf}, doi = {10.2166/wst.2020.305}, issn = {0273-1223, 1996-9732}, year = {2020}, date = {2020-01-01}, urldate = {2020-12-29}, journal = {Water Science and Technology}, pages = {wst2020305}, abstract = {Abstract The history of water supply and wastewater engineering in Crete Island (Greece) dates back more than ca 4,500 years, since the early Bronze Ages. In the Minoan era, it was recognized that the removal of wastewater and storm-water were necessary for communal living. The early Minoan developments in wastewater and storm-water collection and removal are the cornerstones on which modern cities are built. The evolution of wastewater and storm-water management from prehistoric to modern times in Crete is examined briefly in this paper. Information on the current status and future strategies for wastewater and storm-water management is also presented.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Abstract The history of water supply and wastewater engineering in Crete Island (Greece) dates back more than ca 4,500 years, since the early Bronze Ages. In the Minoan era, it was recognized that the removal of wastewater and storm-water were necessary for communal living. The early Minoan developments in wastewater and storm-water collection and removal are the cornerstones on which modern cities are built. The evolution of wastewater and storm-water management from prehistoric to modern times in Crete is examined briefly in this paper. Information on the current status and future strategies for wastewater and storm-water management is also presented. |
2019 |
Manousaki, Tereza; Koutsouveli, Vasiliki; Lagnel, Jacques; Kollias, Spyridon; Tsigenopoulos, Costas S; Arvanitidis, Christos; Magoulas, Antonios; Dounas, Costas; Dailianis, Thanos A de novo transcriptome assembly for the bath sponge Spongia officinalis, adjusting for microsymbionts Journal Article BMC Research Notes, 12 (1), pp. 813, 2019, ISSN: 1756-0500. @article{manousaki_novo_2019, title = {A de novo transcriptome assembly for the bath sponge Spongia officinalis, adjusting for microsymbionts}, author = {Tereza Manousaki and Vasiliki Koutsouveli and Jacques Lagnel and Spyridon Kollias and Costas S Tsigenopoulos and Christos Arvanitidis and Antonios Magoulas and Costas Dounas and Thanos Dailianis}, url = {https://bmcresnotes.biomedcentral.com/articles/10.1186/s13104-019-4843-6}, doi = {10.1186/s13104-019-4843-6}, issn = {1756-0500}, year = {2019}, date = {2019-12-01}, urldate = {2020-08-06}, journal = {BMC Research Notes}, volume = {12}, number = {1}, pages = {813}, abstract = {Objectives We report a transcriptome acquisition for the bath sponge Spongia officinalis, a non-model marine organism that hosts rich symbiotic microbial communities. To this end, a pipeline was developed to efficiently separate between bacterial expressed genes from those of eukaryotic origin. The transcriptome was produced to support the assessment of gene expression and, thus, the response of the sponge, to elevated temperatures, replicating conditions currently occurring in its native habitat. Data description We describe the assembled transcriptome along with the bioinformatic pipeline used to discriminate between signals of metazoan and prokaryotic origin. The pipeline involves standard read pre-processing steps and incorporates extra analyses to identify and filter prokaryotic reads out of the analysis. The proposed pipeline can be followed to overcome the technical RNASeq problems characteristic for symbiont-rich metazoan organisms with low or non-existent tissue differentiation, such as sponges and cnidarians. At the same time, it can be valuable towards the development of approaches for parallel transcriptomic studies of symbiotic communities and the host.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Objectives We report a transcriptome acquisition for the bath sponge Spongia officinalis, a non-model marine organism that hosts rich symbiotic microbial communities. To this end, a pipeline was developed to efficiently separate between bacterial expressed genes from those of eukaryotic origin. The transcriptome was produced to support the assessment of gene expression and, thus, the response of the sponge, to elevated temperatures, replicating conditions currently occurring in its native habitat. Data description We describe the assembled transcriptome along with the bioinformatic pipeline used to discriminate between signals of metazoan and prokaryotic origin. The pipeline involves standard read pre-processing steps and incorporates extra analyses to identify and filter prokaryotic reads out of the analysis. The proposed pipeline can be followed to overcome the technical RNASeq problems characteristic for symbiont-rich metazoan organisms with low or non-existent tissue differentiation, such as sponges and cnidarians. At the same time, it can be valuable towards the development of approaches for parallel transcriptomic studies of symbiotic communities and the host. |
Gerovasileiou, Vasilis; Smith, Christopher J; Kiparissis, Sotiris; Stamouli, Caterina; Dounas, Costas; Mytilineou, Chryssi Updating the distribution status of the critically endangered bamboo coral Isidella elongata (Esper, 1788) in the deep Eastern Mediterranean Sea Journal Article Regional Studies in Marine Science, 28 , pp. 100610, 2019, ISSN: 23524855. @article{gerovasileiou_updating_2019, title = {Updating the distribution status of the critically endangered bamboo coral Isidella elongata (Esper, 1788) in the deep Eastern Mediterranean Sea}, author = {Vasilis Gerovasileiou and Christopher J Smith and Sotiris Kiparissis and Caterina Stamouli and Costas Dounas and Chryssi Mytilineou}, url = {https://linkinghub.elsevier.com/retrieve/pii/S2352485518302809}, doi = {10.1016/j.rsma.2019.100610}, issn = {23524855}, year = {2019}, date = {2019-04-01}, urldate = {2020-08-21}, journal = {Regional Studies in Marine Science}, volume = {28}, pages = {100610}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
2018 |
Keklikoglou, K; Chatzigeorgiou, G; Faulwetter, S; Kalogeropoulou, V; Plaiti, W; Maidanou, M; Dounas, C; Lampadariou, N; Arvanitidis, C 'Simple' can be good, too: Testing three hard bottom sampling methods on macrobenthic and meiobenthic assemblages Journal Article Journal of the Marine Biological Association of the United Kingdom, 2018, ISSN: 00253154, (Publisher: Cambridge University Press). @article{keklikoglou_simple_2018, title = {'Simple' can be good, too: Testing three hard bottom sampling methods on macrobenthic and meiobenthic assemblages}, author = {K Keklikoglou and G Chatzigeorgiou and S Faulwetter and V Kalogeropoulou and W Plaiti and M Maidanou and C Dounas and N Lampadariou and C Arvanitidis}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055515853&doi=10.1017%2fS0025315418000863&partnerID=40&md5=3cb71874d9e2fbcb00720d2b0f17d0a1}, doi = {10.1017/S0025315418000863}, issn = {00253154}, year = {2018}, date = {2018-01-01}, journal = {Journal of the Marine Biological Association of the United Kingdom}, abstract = {Subtidal hard bottoms are of particular scientific and economic value as they are highly productive systems. They are less well studied compared with soft bottoms, as they often require manual sample collection via scuba diving. Although a multitude of sampling devices is available for soft bottoms, only a few are suitable for hard substrates, and their performance is largely unstudied. In the present study, three hard bottom sampling methods were compared, regarding their sampling efficiency and the damage they may cause to macrobenthic and meiobenthic organisms. Two of the sampling methods examined are typically employed for the study of hard bottom substrates (manual collection, airlift device), while the third involves a newly constructed sampler (MANOSS - Manual Operated Suction Sampler). All three sampling methods were tested at 12 m depth on a hard bottom substrate with algal coverage dominated by Cystoseira spp. No overall significant differences were observed between the sampling efficiency and the damage caused by the three sampling methods regarding the macrofaunal assemblages, with the exception of the MANOSS method which collected more species than the manual method. In addition, significant differences were observed in the collecting performance for the meiobenthic assemblages, presenting significantly higher densities of meiofauna sampled by the MANOSS compared with the manual collection method, while the airlift device presented an intermediate efficiency. However, taking into account other factors such as cost, ease of use and the scope of each study, none of the methods clearly outperforms the others. Copyright © Marine Biological Association of the United Kingdom 2018.}, note = {Publisher: Cambridge University Press}, keywords = {}, pubstate = {published}, tppubtype = {article} } Subtidal hard bottoms are of particular scientific and economic value as they are highly productive systems. They are less well studied compared with soft bottoms, as they often require manual sample collection via scuba diving. Although a multitude of sampling devices is available for soft bottoms, only a few are suitable for hard substrates, and their performance is largely unstudied. In the present study, three hard bottom sampling methods were compared, regarding their sampling efficiency and the damage they may cause to macrobenthic and meiobenthic organisms. Two of the sampling methods examined are typically employed for the study of hard bottom substrates (manual collection, airlift device), while the third involves a newly constructed sampler (MANOSS - Manual Operated Suction Sampler). All three sampling methods were tested at 12 m depth on a hard bottom substrate with algal coverage dominated by Cystoseira spp. No overall significant differences were observed between the sampling efficiency and the damage caused by the three sampling methods regarding the macrofaunal assemblages, with the exception of the MANOSS method which collected more species than the manual method. In addition, significant differences were observed in the collecting performance for the meiobenthic assemblages, presenting significantly higher densities of meiofauna sampled by the MANOSS compared with the manual collection method, while the airlift device presented an intermediate efficiency. However, taking into account other factors such as cost, ease of use and the scope of each study, none of the methods clearly outperforms the others. Copyright © Marine Biological Association of the United Kingdom 2018. |
2017 |
Maidanou, M; Koulouri, P; Arvanitidis, C; Koutsoubas, D; Dounas, C Macrobenthic assemblage structure associated with a Caulerpa prolifera meadow in the eastern Mediterranean Sea (Elounda Bay, Crete Island) Journal Article Regional Studies in Marine Science, 14 , pp. 1–14, 2017, ISSN: 23524855, (Publisher: Elsevier B.V.). @article{maidanou_macrobenthic_2017, title = {Macrobenthic assemblage structure associated with a Caulerpa prolifera meadow in the eastern Mediterranean Sea (Elounda Bay, Crete Island)}, author = {M Maidanou and P Koulouri and C Arvanitidis and D Koutsoubas and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018339510&doi=10.1016%2fj.rsma.2017.04.004&partnerID=40&md5=5537690cc92ad9e5af4b198854bb8110}, doi = {10.1016/j.rsma.2017.04.004}, issn = {23524855}, year = {2017}, date = {2017-01-01}, journal = {Regional Studies in Marine Science}, volume = {14}, pages = {1--14}, abstract = {The present study investigates the structure and intra-annual variation of the benthic macrofaunal community associated with a monospecific C. prolifera meadow in a shallow semi-enclosed coastal marine ecosystem of the eastern Mediterranean Sea (Elounda Bay, Crete Island). The samples were collected on five occasions (May, September and November 2006, February and April 2007) by using an epibenthic sledge (0.5 mm mesh size). The analysis of the macrofauna revealed 319 taxa with densities ranging from 71 to 410 individuals m−2. The most diversified animal groups were polychaetes, gastropods and amphipods. Crustaceans were by far the most abundant group with densities exceeding 50% of the total macrofauna during the study period. The dominant species were the amphipods Caprella acanthifera acanthifera, C. rapax and Microdeutopus stationis, the gastropod Pusillina lineolata, the tanaid Leptochelia sp. and the bivalve Abra alba. The results of the present study revealed a relatively high diversified and abundant benthic macrofauna, which is supported by the presence of the dense and continuous canopy of C. prolifera in this shallow wave-sheltered area characterized by high organic matter input. © 2017 Elsevier B.V.}, note = {Publisher: Elsevier B.V.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The present study investigates the structure and intra-annual variation of the benthic macrofaunal community associated with a monospecific C. prolifera meadow in a shallow semi-enclosed coastal marine ecosystem of the eastern Mediterranean Sea (Elounda Bay, Crete Island). The samples were collected on five occasions (May, September and November 2006, February and April 2007) by using an epibenthic sledge (0.5 mm mesh size). The analysis of the macrofauna revealed 319 taxa with densities ranging from 71 to 410 individuals m−2. The most diversified animal groups were polychaetes, gastropods and amphipods. Crustaceans were by far the most abundant group with densities exceeding 50% of the total macrofauna during the study period. The dominant species were the amphipods Caprella acanthifera acanthifera, C. rapax and Microdeutopus stationis, the gastropod Pusillina lineolata, the tanaid Leptochelia sp. and the bivalve Abra alba. The results of the present study revealed a relatively high diversified and abundant benthic macrofauna, which is supported by the presence of the dense and continuous canopy of C. prolifera in this shallow wave-sheltered area characterized by high organic matter input. © 2017 Elsevier B.V. |
2016 |
Chatzigeorgiou, G; Faulwetter, S; Dailianis, T; Smith, V S; Koulouri, P; Dounas, C; Arvanitidis, C Testing the robustness of Citizen Science projects: Evaluating the results of pilot project COMBER Journal Article Biodiversity Data Journal, 4 (1), 2016, ISSN: 13142828, (Publisher: Pensoft Publishers). @article{chatzigeorgiou_testing_2016, title = {Testing the robustness of Citizen Science projects: Evaluating the results of pilot project COMBER}, author = {G Chatzigeorgiou and S Faulwetter and T Dailianis and V S Smith and P Koulouri and C Dounas and C Arvanitidis}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018623784&doi=10.3897%2fBDJ.4.e10859&partnerID=40&md5=5e1065f8df7260a055f72bdac84bccf2}, doi = {10.3897/BDJ.4.e10859}, issn = {13142828}, year = {2016}, date = {2016-01-01}, journal = {Biodiversity Data Journal}, volume = {4}, number = {1}, abstract = {Background Citizen Science (CS) as a term implies a great deal of approaches and scopes involving many different fields of science. The number of the relevant projects globally has been increased significantly in the recent years. Large scale ecological questions can be answered only through extended observation networks and CS projects can support this effort. Although the need of such projects is apparent, an important part of scientific community cast doubt on the reliability of CS data sets. New information The pilot CS project COMBER has been created in order to provide evidence to answer the aforementioned question in the coastal marine biodiversity monitoring. The results of the current analysis show that a carefully designed CS project with clear hypotheses, wide participation and data sets validation, can be a valuable tool for the large scale and long term changes in marine biodiversity pattern change and therefore for relevant management and conservation issues. © Chatzigeorgiou G et al.}, note = {Publisher: Pensoft Publishers}, keywords = {}, pubstate = {published}, tppubtype = {article} } Background Citizen Science (CS) as a term implies a great deal of approaches and scopes involving many different fields of science. The number of the relevant projects globally has been increased significantly in the recent years. Large scale ecological questions can be answered only through extended observation networks and CS projects can support this effort. Although the need of such projects is apparent, an important part of scientific community cast doubt on the reliability of CS data sets. New information The pilot CS project COMBER has been created in order to provide evidence to answer the aforementioned question in the coastal marine biodiversity monitoring. The results of the current analysis show that a carefully designed CS project with clear hypotheses, wide participation and data sets validation, can be a valuable tool for the large scale and long term changes in marine biodiversity pattern change and therefore for relevant management and conservation issues. © Chatzigeorgiou G et al. |
Mytilineou, C; Akel, E H K; Babali, N; Balistreri, P; Bariche, M; Boyaci, Y Ö; Cilenti, L; Constantinou, C; Crocetta, F; Çelik, M; Dereli, H; Dounas, C; Durucan, F; Garrido, A; Gerovasileiou, V; Kapiris, K; Kebapcioglu, T; Kleitou, P; Krystalas, A; Lipej, L; Maina, I; Marakis, P; Mavric, B; Moussa, R; Peña-Rivas, L; Poursanidis, D; Renda, W; Rizkalla, S I; Rosso, A; Scirocco, T; Sciuto, F; Servello, G; Tiralongo, F; Yapici, S; Zenetos, A A New mediterranean biodiversity records (November, 2016) Journal Article Mediterranean Marine Science, 17 (3), pp. 794–821, 2016, ISSN: 1108393X, (Publisher: Hellenic Centre for Marine Research). @article{mytilineou_new_2016, title = {New mediterranean biodiversity records (November, 2016)}, author = {C Mytilineou and E H K Akel and N Babali and P Balistreri and M Bariche and Y Ö Boyaci and L Cilenti and C Constantinou and F Crocetta and M Çelik and H Dereli and C Dounas and F Durucan and A Garrido and V Gerovasileiou and K Kapiris and T Kebapcioglu and P Kleitou and A Krystalas and L Lipej and I Maina and P Marakis and B Mavric and R Moussa and L Peña-Rivas and D Poursanidis and W Renda and S I Rizkalla and A Rosso and T Scirocco and F Sciuto and G Servello and F Tiralongo and S Yapici and A A Zenetos}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85025683855&doi=10.12681%2fmms.1976&partnerID=40&md5=d1378e8afcb69241267862c9000f5d07}, doi = {10.12681/mms.1976}, issn = {1108393X}, year = {2016}, date = {2016-01-01}, journal = {Mediterranean Marine Science}, volume = {17}, number = {3}, pages = {794--821}, abstract = {This Collective Article presents information on 26 taxa belonging to 8 Phyla and extending from the western Mediterranean to the Levantine Sea. The new records were found in 9 countries as follows: Spain: first record for the Mediterranean of the crab Cancer bellianus; Algeria: further records of the alien fish Lagocephalus sceleratus in western Algerian waters; Italy: first report on the presence and establishment of the ctenophore Mnemiopsis leidyi in Lessina and Varano Lagoons (W. Adriatic) and of Penaeus aztecus in Corigliano Gulf (Italian Ionian). Moreover, the extension of the distribution range of the polychaete Branchiomma bairdi to W. Sicily as well as that of the crab Ocypode cursor and the bryozoan Catenicella paradoxa to E. Sicily are cited. Slovenia: the record of the rare saccoglossan gastropod Placida cremoniana from Piran (Gulf of Trieste) is the first for the Adriatic; Greece: the native sea slug Eubranchus farrani is the first from the Eastern Mediterranean; many sightings of the bamboo corals Isididae distributed along all the E. Ionian Sea and the establishment of P. aztecus in all Greek waters are also reported for first time; the westernmost extension of the alien urchin Diadema setosum in Cretan waters is cited and new sightings of the alien species Goniobranchus annulatus and Pterois miles are presented. Turkey: the alien fish Champsodon capensis is reported for first time from the Aegean Sea and the native acari Agauopsis microrhyncha from the Levantine Sea; a new observation of the alien crab Atergatis roseus in Güllük Bay-Aegean is also mentioned; Cyprus: first records of the alien urchin D. setosum and Lobotes surinamensis in Cypriot waters; Lebanon: several sightings of Monachus monachus from Lebanese waters indicate a potential better status for the species in the area; Egypt: first records of the alien crab Dorippe quadridens and the alien gastropods Nerita sanguinolenta and Conomurex persicus from the Mediterranean Egyptian waters; extension of the distribution range of Diodora funiculata and Diodora rueppellii and a second record of the alien Fulvia fragilis in the same area.}, note = {Publisher: Hellenic Centre for Marine Research}, keywords = {}, pubstate = {published}, tppubtype = {article} } This Collective Article presents information on 26 taxa belonging to 8 Phyla and extending from the western Mediterranean to the Levantine Sea. The new records were found in 9 countries as follows: Spain: first record for the Mediterranean of the crab Cancer bellianus; Algeria: further records of the alien fish Lagocephalus sceleratus in western Algerian waters; Italy: first report on the presence and establishment of the ctenophore Mnemiopsis leidyi in Lessina and Varano Lagoons (W. Adriatic) and of Penaeus aztecus in Corigliano Gulf (Italian Ionian). Moreover, the extension of the distribution range of the polychaete Branchiomma bairdi to W. Sicily as well as that of the crab Ocypode cursor and the bryozoan Catenicella paradoxa to E. Sicily are cited. Slovenia: the record of the rare saccoglossan gastropod Placida cremoniana from Piran (Gulf of Trieste) is the first for the Adriatic; Greece: the native sea slug Eubranchus farrani is the first from the Eastern Mediterranean; many sightings of the bamboo corals Isididae distributed along all the E. Ionian Sea and the establishment of P. aztecus in all Greek waters are also reported for first time; the westernmost extension of the alien urchin Diadema setosum in Cretan waters is cited and new sightings of the alien species Goniobranchus annulatus and Pterois miles are presented. Turkey: the alien fish Champsodon capensis is reported for first time from the Aegean Sea and the native acari Agauopsis microrhyncha from the Levantine Sea; a new observation of the alien crab Atergatis roseus in Güllük Bay-Aegean is also mentioned; Cyprus: first records of the alien urchin D. setosum and Lobotes surinamensis in Cypriot waters; Lebanon: several sightings of Monachus monachus from Lebanese waters indicate a potential better status for the species in the area; Egypt: first records of the alien crab Dorippe quadridens and the alien gastropods Nerita sanguinolenta and Conomurex persicus from the Mediterranean Egyptian waters; extension of the distribution range of Diodora funiculata and Diodora rueppellii and a second record of the alien Fulvia fragilis in the same area. |
Koulouri, P; Kalogirou, S; Maidanou, M; Koutsoubas, D; Dounas, C Regional Studies in Marine Science, 3 , pp. 33–41, 2016, ISSN: 23524855, (Publisher: Elsevier). @article{koulouri_fish_2016, title = {Fish and cephalopod assemblage structure of green alga Caulerpa prolifera (Chlorophyta) meadow in the eastern Mediterranean Sea (Elounda Bay, Crete Island)}, author = {P Koulouri and S Kalogirou and M Maidanou and D Koutsoubas and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84951094365&doi=10.1016%2fj.rsma.2015.12.002&partnerID=40&md5=327c2b4b5171a102b8d4cda066a5ad22}, doi = {10.1016/j.rsma.2015.12.002}, issn = {23524855}, year = {2016}, date = {2016-01-01}, journal = {Regional Studies in Marine Science}, volume = {3}, pages = {33--41}, abstract = {The present study investigated for the first time in the eastern Mediterranean Sea species composition, density, wet biomass and body size of fish and cephalopod species associated with a Caulerpa prolifera meadow in a shallow semi-enclosed coastal marine ecosystem (Elounda Bay, Crete Island). Quantitative sampling with a local boat seine, revealed 34 fish species belonging to 22 families and three cephalopod taxa. The number and density of species peaked during the summer sampling period due to high numbers of juveniles, while the highest wet biomass was observed during the autumn sampling period. The fish species Boops boops, Spicara smaris, Mullus barbatus and the non-indigenous Siganus luridus were dominant, making up a high proportion of the total fish fauna of the studied area. The cephalopod Sepia officinalis was the most important species, in terms of wet biomass. The results of the study indicated that the semi-enclosed coastal marine ecosystem of Elounda Bay, characterized by a dense monospecific C. prolifera bed as well as specific abiotic and biotic features could be regarded as an important habitat for the development of fish and cephalopod species, thus contributing to the conservation and maintenance of marine biological resources of the area. © 2015 Elsevier B.V.}, note = {Publisher: Elsevier}, keywords = {}, pubstate = {published}, tppubtype = {article} } The present study investigated for the first time in the eastern Mediterranean Sea species composition, density, wet biomass and body size of fish and cephalopod species associated with a Caulerpa prolifera meadow in a shallow semi-enclosed coastal marine ecosystem (Elounda Bay, Crete Island). Quantitative sampling with a local boat seine, revealed 34 fish species belonging to 22 families and three cephalopod taxa. The number and density of species peaked during the summer sampling period due to high numbers of juveniles, while the highest wet biomass was observed during the autumn sampling period. The fish species Boops boops, Spicara smaris, Mullus barbatus and the non-indigenous Siganus luridus were dominant, making up a high proportion of the total fish fauna of the studied area. The cephalopod Sepia officinalis was the most important species, in terms of wet biomass. The results of the study indicated that the semi-enclosed coastal marine ecosystem of Elounda Bay, characterized by a dense monospecific C. prolifera bed as well as specific abiotic and biotic features could be regarded as an important habitat for the development of fish and cephalopod species, thus contributing to the conservation and maintenance of marine biological resources of the area. © 2015 Elsevier B.V. |
Romero-Ramirez, A; Bonifácio, P; Labrune, C; Sardá, R; Amouroux, J M; Bellan, G; Duchêne, J C; Hermand, R; Karakassis, I; Dounas, C; Grémare, A Long-term (1998-2010) large-scale comparison of the ecological quality status of gulf of lions (NW Mediterranean) benthic habitats Journal Article Marine Pollution Bulletin, 102 (1), pp. 102–113, 2016, ISSN: 0025326X, (Publisher: Elsevier Ltd). @article{romero-ramirez_long-term_2016, title = {Long-term (1998-2010) large-scale comparison of the ecological quality status of gulf of lions (NW Mediterranean) benthic habitats}, author = {A Romero-Ramirez and P Bonifácio and C Labrune and R Sardá and J M Amouroux and G Bellan and J C Duchêne and R Hermand and I Karakassis and C Dounas and A Grémare}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956957240&doi=10.1016%2fj.marpolbul.2015.11.052&partnerID=40&md5=4a816b544ac0dcaee35ba40193d8fb38}, doi = {10.1016/j.marpolbul.2015.11.052}, issn = {0025326X}, year = {2016}, date = {2016-01-01}, journal = {Marine Pollution Bulletin}, volume = {102}, number = {1}, pages = {102--113}, abstract = {A comprehensive Mediterranean data set has been used to address 3 questions associated with the use of sensitivity/tolerance based biotic indices to infer the Ecological Quality status (EcoQs) of benthic habitats. Our results showed: (1) a significant effect of the reference database on derived sensitivity/tolerance measure (ES500.05) as well as associated Benthic Quality Index values and derived EcoQs; (2) a lack of correlation neither between BQI and AZTI Marine Biotic Index values nor between BQI and Multivariate-AZTI Marine Biotic Index values; (3) a lack of correlation between the values of the Benthic Habitat Quality Index (index derived from Sediment Profile Imagery) and those of either of the 3 tested biotic indices; and (4) a general agreement between the 3 tested biotic indices in describing the lack of global trend for the EcoQs of the Gulf of Lions despite the occurrence of significant changes in benthic macrofauna composition between 1998 and 2010. © 2015 Elsevier Ltd.}, note = {Publisher: Elsevier Ltd}, keywords = {}, pubstate = {published}, tppubtype = {article} } A comprehensive Mediterranean data set has been used to address 3 questions associated with the use of sensitivity/tolerance based biotic indices to infer the Ecological Quality status (EcoQs) of benthic habitats. Our results showed: (1) a significant effect of the reference database on derived sensitivity/tolerance measure (ES500.05) as well as associated Benthic Quality Index values and derived EcoQs; (2) a lack of correlation neither between BQI and AZTI Marine Biotic Index values nor between BQI and Multivariate-AZTI Marine Biotic Index values; (3) a lack of correlation between the values of the Benthic Habitat Quality Index (index derived from Sediment Profile Imagery) and those of either of the 3 tested biotic indices; and (4) a general agreement between the 3 tested biotic indices in describing the lack of global trend for the EcoQs of the Gulf of Lions despite the occurrence of significant changes in benthic macrofauna composition between 1998 and 2010. © 2015 Elsevier Ltd. |
Dounas, C; Androulakis, D; Dailianis, T; Koulouri, P Recreational diving oasis with artificial habitats Inproceedings Rapp. Com. int. Mer Médit., pp. 476, 2016. @inproceedings{dounas_recreational_2016, title = {Recreational diving oasis with artificial habitats}, author = {C Dounas and D Androulakis and T Dailianis and P Koulouri}, year = {2016}, date = {2016-01-01}, booktitle = {Rapp. Com. int. Mer Médit.}, volume = {41}, pages = {476}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Koulouri, P; Psochiou, E; Dounas, C Measures for the conservation and management of marine biological resources of Elounda Bay (Crete Island) Inproceedings Rapp. Com. int. Mer Médit., pp. 527, Kiel, Germany, 2016. @inproceedings{koulouri_measures_2016, title = {Measures for the conservation and management of marine biological resources of Elounda Bay (Crete Island)}, author = {P Koulouri and E Psochiou and C Dounas}, year = {2016}, date = {2016-01-01}, booktitle = {Rapp. Com. int. Mer Médit.}, volume = {41}, pages = {527}, address = {Kiel, Germany}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Skoula, I; Koulouri, P; Dounas, C; Eleftheriou, M The Kingdom of Photophilous Algae Book BIOWATCH Editions, Heraklion, Crete, 2016. @book{skoula_kingdom_2016, title = {The Kingdom of Photophilous Algae}, author = {I Skoula and P Koulouri and C Dounas and M Eleftheriou}, year = {2016}, date = {2016-01-01}, publisher = {BIOWATCH Editions}, address = {Heraklion, Crete}, keywords = {}, pubstate = {published}, tppubtype = {book} } |
2015 |
Koulouri, P; Dounas, C; Arvanitidis, C; Koutsoubas, D; Tselepides, A; Eleftheriou, A A field experiment on trophic relations within the benthic boundary layer (BBL) over an oligotrophic continental shelf Journal Article Estuarine, Coastal and Shelf Science, 164 , pp. 392–407, 2015, ISSN: 02727714, (Publisher: Academic Press). @article{koulouri_field_2015, title = {A field experiment on trophic relations within the benthic boundary layer (BBL) over an oligotrophic continental shelf}, author = {P Koulouri and C Dounas and C Arvanitidis and D Koutsoubas and A Tselepides and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84939607766&doi=10.1016%2fj.ecss.2015.07.029&partnerID=40&md5=bd870466fe027569f055b2da46d553de}, doi = {10.1016/j.ecss.2015.07.029}, issn = {02727714}, year = {2015}, date = {2015-01-01}, journal = {Estuarine, Coastal and Shelf Science}, volume = {164}, pages = {392--407}, abstract = {The benthic boundary layer (BBL) macrofauna consists of epibenthic, hyperbenthic and zooplanktonic organisms with different degrees of mobility and bottom dependence. The top-level predators within this habitat include demersal fish species. The BBL species are considered to be the most readily available prey for these fish making them an attractive source of food and therefore key taxa in marine food webs. The present study is a field experiment in the oligotrophic continental shelf of Heraklion Bay (Cretan Sea, eastern Mediterranean) investigating the ways in which demersal fish utilize BBL sources as food. Species diversity patterns derived from samples collected by using a modified hyperbenthic sledge as well as different benthic, hyperbenthic and pelagic samplers are described. These patterns are compared with those derived from stomach content analysis of demersal fish species inhabiting the same area. Results reveal that BBL macrofaunal communities which comprise most of the available prey communities are largely exploited by demersal fish species. Furthermore, the application of different samplers provides complementary information on prey selectivity of macrofaunal organisms by demersal fish species, highlighting further the trophic interactions within the BBL habitat. © 2015 Elsevier Ltd.}, note = {Publisher: Academic Press}, keywords = {}, pubstate = {published}, tppubtype = {article} } The benthic boundary layer (BBL) macrofauna consists of epibenthic, hyperbenthic and zooplanktonic organisms with different degrees of mobility and bottom dependence. The top-level predators within this habitat include demersal fish species. The BBL species are considered to be the most readily available prey for these fish making them an attractive source of food and therefore key taxa in marine food webs. The present study is a field experiment in the oligotrophic continental shelf of Heraklion Bay (Cretan Sea, eastern Mediterranean) investigating the ways in which demersal fish utilize BBL sources as food. Species diversity patterns derived from samples collected by using a modified hyperbenthic sledge as well as different benthic, hyperbenthic and pelagic samplers are described. These patterns are compared with those derived from stomach content analysis of demersal fish species inhabiting the same area. Results reveal that BBL macrofaunal communities which comprise most of the available prey communities are largely exploited by demersal fish species. Furthermore, the application of different samplers provides complementary information on prey selectivity of macrofaunal organisms by demersal fish species, highlighting further the trophic interactions within the BBL habitat. © 2015 Elsevier Ltd. |
2013 |
Koulouri, P; Markantonatou, V; Martin, C; Alexandrakis, G; Poulos, S; Dounas, C; Henocque, Y Sustainable development of a former UṠ. Base in Greece Inproceedings Proceedings of the 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference, pp. 403–414, Middle East Technical University, 2013. @inproceedings{koulouri_sustainable_2013, title = {Sustainable development of a former UṠ. Base in Greece}, author = {P Koulouri and V Markantonatou and C Martin and G Alexandrakis and S Poulos and C Dounas and Y Henocque}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84900854858&partnerID=40&md5=e86bcc86ba3ab58287f0b66591131fb0}, year = {2013}, date = {2013-01-01}, booktitle = {Proceedings of the 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference}, volume = {1}, pages = {403--414}, publisher = {Middle East Technical University}, abstract = {The former U.S. base of Gournes (FUSBG) is located on the northeastern coast of the island of Crete under the regional authority of Hersonissos, a municipality with a coastline of 38 km and a population of more than 27,000 inhabitants. Hersonissos is one of the most important tourist destinations in Greece, representing 15% of the country's tourism resources. During the summer season, there is a substantial flow of touristic visitors, who are accommodated in a large number of hotels. The total surface of the FUSBG is 2.98 km 2 with only 38% in use and providing a range of facilities. In some cases, FUSBG facilities either malfunction or do not function at all, partly because of the financial and economic crisis Greece has been facing since 2007. In 2011, the Greek Parliament passed a law (Gazette: 3986/152/1-7-2011), which allows the so-called "fast track" procedure for purchasing or leasing of public enterprises and property, in order to meet national financial obligations towards the European Union, the European Central Bank and the International Monetary Fund. FUSBG is included in the list of properties suitable for this procedure. To combat the very real risk of uncontrolled future growth of this coastal area, fuelled by the private sector and disregarding the common good and environmental protection, we put forward a proposal that depends on a strategy of rapid actions, based on an analysis of the existing legislative and institutional framework, together with an exploration of the most important environmental components focusing on the development of the FUSBG. Tools applied in the analysis, such as Geographical Information Systems (GIS) and a Beach Vulnerability Index (BVI) to anticipated sea-level rise, are proposed as important means for setting up the overall framework for a successful Integrated Coastal Zone Management (ICZM) implementation in the study area. Additionally, the establishment of a management board consisting of a wide range of local stakeholders from the public and private sectors is strongly recommended, ensuring local interests and enhancing public awareness on issues relevant to the FUSBG's sustainable development. Loss of faith in institutions may result in a need to draw up new cycles of consultations and agreements between different parties that will be built up on trust and transparent procedures, to ensure benefits for the civil society, respect of cultural heritage issues and co-management of the area.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } The former U.S. base of Gournes (FUSBG) is located on the northeastern coast of the island of Crete under the regional authority of Hersonissos, a municipality with a coastline of 38 km and a population of more than 27,000 inhabitants. Hersonissos is one of the most important tourist destinations in Greece, representing 15% of the country's tourism resources. During the summer season, there is a substantial flow of touristic visitors, who are accommodated in a large number of hotels. The total surface of the FUSBG is 2.98 km 2 with only 38% in use and providing a range of facilities. In some cases, FUSBG facilities either malfunction or do not function at all, partly because of the financial and economic crisis Greece has been facing since 2007. In 2011, the Greek Parliament passed a law (Gazette: 3986/152/1-7-2011), which allows the so-called "fast track" procedure for purchasing or leasing of public enterprises and property, in order to meet national financial obligations towards the European Union, the European Central Bank and the International Monetary Fund. FUSBG is included in the list of properties suitable for this procedure. To combat the very real risk of uncontrolled future growth of this coastal area, fuelled by the private sector and disregarding the common good and environmental protection, we put forward a proposal that depends on a strategy of rapid actions, based on an analysis of the existing legislative and institutional framework, together with an exploration of the most important environmental components focusing on the development of the FUSBG. Tools applied in the analysis, such as Geographical Information Systems (GIS) and a Beach Vulnerability Index (BVI) to anticipated sea-level rise, are proposed as important means for setting up the overall framework for a successful Integrated Coastal Zone Management (ICZM) implementation in the study area. Additionally, the establishment of a management board consisting of a wide range of local stakeholders from the public and private sectors is strongly recommended, ensuring local interests and enhancing public awareness on issues relevant to the FUSBG's sustainable development. Loss of faith in institutions may result in a need to draw up new cycles of consultations and agreements between different parties that will be built up on trust and transparent procedures, to ensure benefits for the civil society, respect of cultural heritage issues and co-management of the area. |
Koulouri, P; Dounas, C; Eleftheriou, A Hyperbenthic community structure over oligotrophic continental shelves and upper slopes: Crete (South Aegean Sea, NE Mediterranean) Journal Article Estuarine, Coastal and Shelf Science, 117 , pp. 188–198, 2013, ISSN: 02727714. @article{koulouri_hyperbenthic_2013, title = {Hyperbenthic community structure over oligotrophic continental shelves and upper slopes: Crete (South Aegean Sea, NE Mediterranean)}, author = {P Koulouri and C Dounas and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84873740432&doi=10.1016%2fj.ecss.2012.11.015&partnerID=40&md5=bddcec5541dd4a44103551d48b007be9}, doi = {10.1016/j.ecss.2012.11.015}, issn = {02727714}, year = {2013}, date = {2013-01-01}, journal = {Estuarine, Coastal and Shelf Science}, volume = {117}, pages = {188--198}, abstract = {The community structure of hyperbenthos on continental shelves and upper slopes of oligotrophic areas have been little studied. The present study, located in the eastern Mediterranean (Heraklion Bay, Crete) gives the first description of this using samples collected at depths ranging between 50 and 300 m in two seasonal occasions (March and September 2001) using a modified hyperbenthic sledge (0.5 mm mesh size) specifically designed to resuspend the sediment surface and to sample simultaneously the hyperbenthic macrofauna. The analysis revealed 96 different taxa (Peracarida and Decapoda) with densities ranging from 198 to 2618 ind 100 m-2 and indicated the presence of a clear zonation of the hyperbenthic communities along a depth gradient as well as different diel and seasonal adaptations to the prevailing environmental conditions of the community structure. Artificial resuspension of the sediment surface revealed that the highest proportion of the hyperbenthic macrofauna collected in this oligotrophic environment (74-100 %) was found to reside at the sediment-water interface (0-0.05 m). This demersal behaviour seems to be a response to high light levels close to the seabed and availability of food sources associated with the sediment surface. © 2012 Elsevier Ltd.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The community structure of hyperbenthos on continental shelves and upper slopes of oligotrophic areas have been little studied. The present study, located in the eastern Mediterranean (Heraklion Bay, Crete) gives the first description of this using samples collected at depths ranging between 50 and 300 m in two seasonal occasions (March and September 2001) using a modified hyperbenthic sledge (0.5 mm mesh size) specifically designed to resuspend the sediment surface and to sample simultaneously the hyperbenthic macrofauna. The analysis revealed 96 different taxa (Peracarida and Decapoda) with densities ranging from 198 to 2618 ind 100 m-2 and indicated the presence of a clear zonation of the hyperbenthic communities along a depth gradient as well as different diel and seasonal adaptations to the prevailing environmental conditions of the community structure. Artificial resuspension of the sediment surface revealed that the highest proportion of the hyperbenthic macrofauna collected in this oligotrophic environment (74-100 %) was found to reside at the sediment-water interface (0-0.05 m). This demersal behaviour seems to be a response to high light levels close to the seabed and availability of food sources associated with the sediment surface. © 2012 Elsevier Ltd. |
Dounas, C; Koulouri, P Explore while snorkelling the Mediterranean Coastal Fish: An underwater field guide Book BIOWATCH Editions,, 2013. @book{dounas_explore_2013, title = {Explore while snorkelling the Mediterranean Coastal Fish: An underwater field guide}, author = {C Dounas and P Koulouri}, year = {2013}, date = {2013-01-01}, publisher = {BIOWATCH Editions,}, keywords = {}, pubstate = {published}, tppubtype = {book} } |
2011 |
Arvanitidis, C; Faulwetter, S; Chatzigeorgiou, G; Penev, L; Bánki, O; Dailianis, T; Pafilis, E; Kouratoras, M; Chatzinikolaou, E; Fanini, L; Vasileiadou, A; Pavloudi, C; Vavilis, P; Koulouri, P; Dounas, C Engaging the broader community in biodiversity research: The concept of the COMBER pilot project for divers in vibrant Journal Article ZooKeys, 150 , pp. 211–229, 2011, ISSN: 13132989. @article{arvanitidis_engaging_2011, title = {Engaging the broader community in biodiversity research: The concept of the COMBER pilot project for divers in vibrant}, author = {C Arvanitidis and S Faulwetter and G Chatzigeorgiou and L Penev and O Bánki and T Dailianis and E Pafilis and M Kouratoras and E Chatzinikolaou and L Fanini and A Vasileiadou and C Pavloudi and P Vavilis and P Koulouri and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84856457337&doi=10.3897%2fzookeys.150.2149&partnerID=40&md5=48d27ff65c2def3588c3e0f3a8b72a92}, doi = {10.3897/zookeys.150.2149}, issn = {13132989}, year = {2011}, date = {2011-01-01}, journal = {ZooKeys}, volume = {150}, pages = {211--229}, abstract = {This paper discusses the design and implementation of a citizen science pilot project, COMBER (Citizens' Network for the Observation of Marine Biodiv ERsity, http://www.comber.hcmr.gr, which has been initiated under the Vi BRANT EU e-infrastructure. It is designed and implemented for divers and snorkelers who are interested in participating in marine biodiversity citizen science projects. It shows the necessity of engaging the broader community in the marine biodiversity monitoring and research projects, networks and initiatives. It analyses the stakeholders, the industry and the relevant markets involved in diving activities and their potential to sustain these activities. The principles, including data policy and rewards for the participating divers through their own data, upon which this project is based are thoroughly discussed. The results of the users analysis and lessons learned so far are presented. Future plans include promotion, links with citizen science web developments, data publishing tools, and development of new scientific hypotheses to be tested by the data collected so far.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This paper discusses the design and implementation of a citizen science pilot project, COMBER (Citizens' Network for the Observation of Marine Biodiv ERsity, http://www.comber.hcmr.gr, which has been initiated under the Vi BRANT EU e-infrastructure. It is designed and implemented for divers and snorkelers who are interested in participating in marine biodiversity citizen science projects. It shows the necessity of engaging the broader community in the marine biodiversity monitoring and research projects, networks and initiatives. It analyses the stakeholders, the industry and the relevant markets involved in diving activities and their potential to sustain these activities. The principles, including data policy and rewards for the participating divers through their own data, upon which this project is based are thoroughly discussed. The results of the users analysis and lessons learned so far are presented. Future plans include promotion, links with citizen science web developments, data publishing tools, and development of new scientific hypotheses to be tested by the data collected so far. |
Dailianis, T; Tsigenopoulos, C S; Dounas, C; Voultsiadou, E Molecular Ecology, 20 (18), pp. 3757–3772, 2011, ISSN: 09621083. @article{dailianis_genetic_2011, title = {Genetic diversity of the imperilled bath sponge Spongia officinalis Linnaeus, 1759 across the Mediterranean Sea: Patterns of population differentiation and implications for taxonomy and conservation}, author = {T Dailianis and C S Tsigenopoulos and C Dounas and E Voultsiadou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84860390594&doi=10.1111%2fj.1365-294X.2011.05222.x&partnerID=40&md5=69d2c113d95d39f51f769ef7d0b5b93e}, doi = {10.1111/j.1365-294X.2011.05222.x}, issn = {09621083}, year = {2011}, date = {2011-01-01}, journal = {Molecular Ecology}, volume = {20}, number = {18}, pages = {3757--3772}, abstract = {The Mediterranean bath sponge Spongia officinalis is an iconic species with high socio-economic value and precarious future owing to unregulated harvesting, mortality incidents and lack of established knowledge regarding its ecology. This study aims to assess genetic diversity and population structure of the species at different geographical scales throughout its distribution. For this purpose, 11 locations in the Eastern Mediterranean (Aegean Sea), Western Mediterranean (Provence coast) and the Strait of Gibraltar were sampled; specimens were analysed using partial mitochondrial cytochrome oxidase subunit I (COI) sequences, along with a set of eight microsatellite loci. According to our results (i) no genetic differentiation exists among the acknowledged Mediterranean morphotypes, and hence, S. officinalis can be viewed as a single, morphologically variable species; (ii) a notable divergence was recorded in the Gibraltar region, indicating the possible existence of a cryptic species; (iii) restriction to gene flow was evidenced between the Aegean Sea and Provence giving two well-defined regional clusters, thus suggesting the existence of a phylogeographic break between the two systems; (iv) low levels of genetic structure, not correlated to geographical distance, were observed inside geographical sectors, implying mechanisms (natural or anthropogenic) that enhance dispersal and gene flow have promoted population connectivity; (v) the genetic diversity of S. officinalis is maintained high in most studied locations despite pressure from harvesting and the influence of devastating epidemics. These findings provide a basis towards the effective conservation and management of the species. © 2011 Blackwell Publishing Ltd.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The Mediterranean bath sponge Spongia officinalis is an iconic species with high socio-economic value and precarious future owing to unregulated harvesting, mortality incidents and lack of established knowledge regarding its ecology. This study aims to assess genetic diversity and population structure of the species at different geographical scales throughout its distribution. For this purpose, 11 locations in the Eastern Mediterranean (Aegean Sea), Western Mediterranean (Provence coast) and the Strait of Gibraltar were sampled; specimens were analysed using partial mitochondrial cytochrome oxidase subunit I (COI) sequences, along with a set of eight microsatellite loci. According to our results (i) no genetic differentiation exists among the acknowledged Mediterranean morphotypes, and hence, S. officinalis can be viewed as a single, morphologically variable species; (ii) a notable divergence was recorded in the Gibraltar region, indicating the possible existence of a cryptic species; (iii) restriction to gene flow was evidenced between the Aegean Sea and Provence giving two well-defined regional clusters, thus suggesting the existence of a phylogeographic break between the two systems; (iv) low levels of genetic structure, not correlated to geographical distance, were observed inside geographical sectors, implying mechanisms (natural or anthropogenic) that enhance dispersal and gene flow have promoted population connectivity; (v) the genetic diversity of S. officinalis is maintained high in most studied locations despite pressure from harvesting and the influence of devastating epidemics. These findings provide a basis towards the effective conservation and management of the species. © 2011 Blackwell Publishing Ltd. |
Dounas, C; Koulouri, P Mediterranean Coastal Fishes: A snorkeler’s field guide Book Kaleidoskopio-BIOWATCH, Heraklion, Crete, Greece, 2011. @book{dounas_mediterranean_2011, title = {Mediterranean Coastal Fishes: A snorkeler’s field guide}, author = {C Dounas and P Koulouri}, year = {2011}, date = {2011-01-01}, publisher = {Kaleidoskopio-BIOWATCH}, address = {Heraklion, Crete, Greece}, keywords = {}, pubstate = {published}, tppubtype = {book} } |
Voultsiadou, Eleni; Dailianis, Thanos; Antoniadou, Chryssanthi; Vafidis, Dimitris; Dounas, Costas; Chintiroglou, Chariton Charles Aegean Bath Sponges: Historical Data and Current Status Journal Article Reviews in Fisheries science, 19 (1), pp. 34–51, 2011. @article{voultsiadou_aegean_2011, title = {Aegean Bath Sponges: Historical Data and Current Status}, author = {Eleni Voultsiadou and Thanos Dailianis and Chryssanthi Antoniadou and Dimitris Vafidis and Costas Dounas and Chariton Charles Chintiroglou}, url = {https://www.tandfonline.com/doi/abs/10.1080/10641262.2010.531794}, doi = {10.1080/10641262.2010.531794}, year = {2011}, date = {2011-01-01}, journal = {Reviews in Fisheries science}, volume = {19}, number = {1}, pages = {34--51}, abstract = {This study attempts to evaluate the status of the populations of bath sponges (species of the genera Spongia and Hippospongia) in the Aegean, combining historical sources dated before a series of disease outbreaks that occurred from 1986 on, unpublished data obtained during the recovery phase after the first incident, as well as a current survey of the main spongiferous beds in the area. The latter was implemented through an extensive sampling trip assisted by professional sponge fishermen, including 55 stations distributed in 17 Aegean islands. Our analysis of population and morphometric data exhibits regeneration potential for bath sponge stocks, yet highlights the contrast between their present status and that of historical times. Uniformity is not evident, as several populations retain high abundances, while simultaneously areas purportedly rich in bath sponges appear deprived. Small-scale environmental regimes in the Aegean are proposed as the shaping factors of this situation; however, the importance of additional elaborate studies and the implementation of an effective regulation scheme regarding their fisheries are stressed.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This study attempts to evaluate the status of the populations of bath sponges (species of the genera Spongia and Hippospongia) in the Aegean, combining historical sources dated before a series of disease outbreaks that occurred from 1986 on, unpublished data obtained during the recovery phase after the first incident, as well as a current survey of the main spongiferous beds in the area. The latter was implemented through an extensive sampling trip assisted by professional sponge fishermen, including 55 stations distributed in 17 Aegean islands. Our analysis of population and morphometric data exhibits regeneration potential for bath sponge stocks, yet highlights the contrast between their present status and that of historical times. Uniformity is not evident, as several populations retain high abundances, while simultaneously areas purportedly rich in bath sponges appear deprived. Small-scale environmental regimes in the Aegean are proposed as the shaping factors of this situation; however, the importance of additional elaborate studies and the implementation of an effective regulation scheme regarding their fisheries are stressed. |
2010 |
Dounas, C; Koutsoubas, D; Salomidi, M; Koulouri, P; Gerovasileiou, V; Sini, M Distribution and Fisheries of the red coral Corallium rubrum (Linnaeus, 1758) in the Greek Seas: an overview Incollection Bussoletti, E; Cottingham, D; Bruckner, A; Roberts, G; Sandulli, R (Ed.): Red Coral Science, Management, and Trade: Lessons from the Mediterranean, (CRCP-13), pp. 106–114, NOAA, 2010. @incollection{dounas_distribution_2010, title = {Distribution and Fisheries of the red coral Corallium rubrum (Linnaeus, 1758) in the Greek Seas: an overview}, author = {C Dounas and D Koutsoubas and M Salomidi and P Koulouri and V Gerovasileiou and M Sini}, editor = {E Bussoletti and D Cottingham and A Bruckner and G Roberts and R Sandulli}, url = {http://www.google.gr/url?sa=t&source=web&cd=8&ved=0CFUQFjAH&url=http%3A%2F%2Fwww.marescienza.it%2Findex.php%3Foption%3Dcom_docman%26task%3Ddoc_download%26gid%3D25%26Itemid%3D32&ei=DZ6-TZi6FtCcOrnovcYF&usg=AFQjCNHYzcaFbY1SRoTN-UABRz62GfoCSQ}, year = {2010}, date = {2010-01-01}, booktitle = {Red Coral Science, Management, and Trade: Lessons from the Mediterranean}, number = {CRCP-13}, pages = {106--114}, publisher = {NOAA}, series = {NOAA Technical Memorandum}, abstract = {Information, both on the spatial and vertical distribution of Corallium rubrum and its fisheries status in the Greek Seas, is reported in this paper, along with problems related to the conservation and sustainable management of this renewable biological resource. Although fisheries of red coral stocks in Greece have been regulated according to a national rotating harvesting system since 1994, the difficulties experienced by both local and central authorities in confronting the illegal fishing of red corals in closed areas may have resulted in a decrease of the local populations. Available data show that in many areas the shallow water red coral stocks (up to 60 m) are now almost depleted. The observed evidence for the decline of red coral stocks in areas only recently opened up to exploitation is a clear indication that fishing (most probably by using illegal dragging gears) was carried out in these areas throughout the closed period. As an attempt to safeguard stock conservation, it is strongly recommended that an international research programme be set up, aiming at investigating the spatial and vertical distribution as well as the population structure of red coral in the Greek Seas, along with the enforcement of supplementary measures that will improve the effectiveness of the rotating harvesting scheme.}, keywords = {}, pubstate = {published}, tppubtype = {incollection} } Information, both on the spatial and vertical distribution of Corallium rubrum and its fisheries status in the Greek Seas, is reported in this paper, along with problems related to the conservation and sustainable management of this renewable biological resource. Although fisheries of red coral stocks in Greece have been regulated according to a national rotating harvesting system since 1994, the difficulties experienced by both local and central authorities in confronting the illegal fishing of red corals in closed areas may have resulted in a decrease of the local populations. Available data show that in many areas the shallow water red coral stocks (up to 60 m) are now almost depleted. The observed evidence for the decline of red coral stocks in areas only recently opened up to exploitation is a clear indication that fishing (most probably by using illegal dragging gears) was carried out in these areas throughout the closed period. As an attempt to safeguard stock conservation, it is strongly recommended that an international research programme be set up, aiming at investigating the spatial and vertical distribution as well as the population structure of red coral in the Greek Seas, along with the enforcement of supplementary measures that will improve the effectiveness of the rotating harvesting scheme. |
2009 |
Arvanitidis, C; Somerfield, P J; Rumohr, H; Faulwetter, S; Valavanis, V; Vasileiadou, A; Chatzigeorgiou, G; Berghe, Vanden E; Vanaverbeke, J; Labrune, C; Grémare, A; Zettler, M L; Kȩdra, M; Włodarska-Kowalczuk, M; Aleffi, I F; Amouroux, J M; Anisimova, N; Bachelet, G; Büntzow, M; Cochrane, S J; Costello, M J; Craeymeersch, J; Dahle, S; Degraer, S; Denisenko, S; Dounas, C; Duineveld, G; Emblow, C; Escavarage, V; Fabri, M C; Fleischer, D; Gray, J S; Heip, C H R; Herrmann, M; Hummel, H; Janas, U; Karakassis, I; Kendall, M A; Kingston, P; Kotwicki, L; Laudien, J; Mackie, A S Y; Nevrova, E L; Occhipinti-Ambrogi, A; Oliver, P G; Olsgard, F; Palerud, R; Petrov, A; Rachor, E; Revkov, N K; Rose, A; Sardá, R; Sistermans, W C H; Speybroeck, J; Hoey, Van G; Vincx, M; Whomersley, P; Willems, W; Zenetos, A Biological geography of the European seas: Results from the MacroBen database Journal Article Marine Ecology Progress Series, 382 , pp. 265–278, 2009, ISSN: 01718630. @article{arvanitidis_biological_2009, title = {Biological geography of the European seas: Results from the MacroBen database}, author = {C Arvanitidis and P J Somerfield and H Rumohr and S Faulwetter and V Valavanis and A Vasileiadou and G Chatzigeorgiou and E Vanden Berghe and J Vanaverbeke and C Labrune and A Grémare and M L Zettler and M Kȩdra and M Włodarska-Kowalczuk and I F Aleffi and J M Amouroux and N Anisimova and G Bachelet and M Büntzow and S J Cochrane and M J Costello and J Craeymeersch and S Dahle and S Degraer and S Denisenko and C Dounas and G Duineveld and C Emblow and V Escavarage and M C Fabri and D Fleischer and J S Gray and C H R Heip and M Herrmann and H Hummel and U Janas and I Karakassis and M A Kendall and P Kingston and L Kotwicki and J Laudien and A S Y Mackie and E L Nevrova and A Occhipinti-Ambrogi and P G Oliver and F Olsgard and R Palerud and A Petrov and E Rachor and N K Revkov and A Rose and R Sardá and W C H Sistermans and J Speybroeck and G Van Hoey and M Vincx and P Whomersley and W Willems and A Zenetos}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-66649133743&doi=10.3354%2fmeps07955&partnerID=40&md5=b494b7aad3e4476e31b82b871b6c26e6}, doi = {10.3354/meps07955}, issn = {01718630}, year = {2009}, date = {2009-01-01}, journal = {Marine Ecology Progress Series}, volume = {382}, pages = {265--278}, abstract = {This study examines whether or not biogeographical and/or managerial divisions across the European seas can be validated using soft-bottom macrobenthic community data. The faunal groups used were: all macrobenthos groups, polychaetes, molluscs, crustaceans, echinoderms, sipun-culans and the last 5 groups combined. In order to test the discriminating power of these groups, 3 criteria were used: (1) proximity, which refers to the expected closer faunal resemblance of adjacent areas relative to more distant ones; (2) randomness, which in the present context is a measure of the degree to which the inventories of the various sectors, provinces or regions may in each case be considered as a random sample of the inventory of the next largest province or region in a hierarchy of geographic scales; and (3) differentiation, which provides a measure of the uniqueness of the pattern. Results show that only polychaetes fulfill all 3 criteria and that the only marine biogeographic system supported by the analyses is the one proposed by Longhurst (1998). Energy fluxes and other interactions between the planktonic and benthic domains, acting over evolutionary time scales, can be associated with the multivariate pattern derived from the macrobenthos datasets. Third-stage multidimensional scaling ordination reveals that polychaetes produce a unique pattern when all systems are under consideration. Average island distance from the nearest coast, number of islands and the island surface area were the geographic variables best correlated with the community patterns produced by polychaetes. Biogeographic patterns suggest a vicariance model dominating over the founder-dispersal model except for the semi-closed regional seas, where a model substantially modified from the second option could be supported. © Inter-Research 2009.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This study examines whether or not biogeographical and/or managerial divisions across the European seas can be validated using soft-bottom macrobenthic community data. The faunal groups used were: all macrobenthos groups, polychaetes, molluscs, crustaceans, echinoderms, sipun-culans and the last 5 groups combined. In order to test the discriminating power of these groups, 3 criteria were used: (1) proximity, which refers to the expected closer faunal resemblance of adjacent areas relative to more distant ones; (2) randomness, which in the present context is a measure of the degree to which the inventories of the various sectors, provinces or regions may in each case be considered as a random sample of the inventory of the next largest province or region in a hierarchy of geographic scales; and (3) differentiation, which provides a measure of the uniqueness of the pattern. Results show that only polychaetes fulfill all 3 criteria and that the only marine biogeographic system supported by the analyses is the one proposed by Longhurst (1998). Energy fluxes and other interactions between the planktonic and benthic domains, acting over evolutionary time scales, can be associated with the multivariate pattern derived from the macrobenthos datasets. Third-stage multidimensional scaling ordination reveals that polychaetes produce a unique pattern when all systems are under consideration. Average island distance from the nearest coast, number of islands and the island surface area were the geographic variables best correlated with the community patterns produced by polychaetes. Biogeographic patterns suggest a vicariance model dominating over the founder-dispersal model except for the semi-closed regional seas, where a model substantially modified from the second option could be supported. © Inter-Research 2009. |
Berghe, Vanden E; Claus, S; Appeltans, W; Faulwetter, S; Arvanitidis, C; Somerfield, P J; Aleffi, I F; Amouroux, J M; Anisimova, N; Bachelet, G; Cochrane, S J; Costello, M J; Craeymeersch, J; Dahle, S; Degraer, S; Denisenko, S; Dounas, C; Duineveld, G; Emblow, C; Escaravage, V; Fabri, M C; Fleischer, D; Grémare, A; Herrmann, M; Hummel, H; Karakassis, I; Kȩdra, M; Kendall, M A; Kingston, P; Kotwicki, L; Labrune, C; Laudien, J; Nevrova, E L; Occhipinti-Ambrogi, A; Olsgard, F; Palerud, R; Petrov, A; Rachor, E; Revkov, N; Rumohr, H; Sardá, R; Sistermans, W C H; Speybroeck, J; Janas, U; Hoey, Van G; Vincx, M; Whomersley, P; Willems, W; Włodarska-Kowalczuk, M; Zenetos, A; Zettler, M L; Heip, C H R MacroBen integrated database on benthic invertebrates of European continental shelves: A tool for large-scale analysis across Europe Journal Article Marine Ecology Progress Series, 382 , pp. 225–238, 2009, ISSN: 01718630. @article{vanden_berghe_macroben_2009, title = {MacroBen integrated database on benthic invertebrates of European continental shelves: A tool for large-scale analysis across Europe}, author = {E Vanden Berghe and S Claus and W Appeltans and S Faulwetter and C Arvanitidis and P J Somerfield and I F Aleffi and J M Amouroux and N Anisimova and G Bachelet and S J Cochrane and M J Costello and J Craeymeersch and S Dahle and S Degraer and S Denisenko and C Dounas and G Duineveld and C Emblow and V Escaravage and M C Fabri and D Fleischer and A Grémare and M Herrmann and H Hummel and I Karakassis and M Kȩdra and M A Kendall and P Kingston and L Kotwicki and C Labrune and J Laudien and E L Nevrova and A Occhipinti-Ambrogi and F Olsgard and R Palerud and A Petrov and E Rachor and N Revkov and H Rumohr and R Sardá and W C H Sistermans and J Speybroeck and U Janas and G Van Hoey and M Vincx and P Whomersley and W Willems and M Włodarska-Kowalczuk and A Zenetos and M L Zettler and C H R Heip}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-66649129962&doi=10.3354%2fmeps07826&partnerID=40&md5=f1bf83439047ae44d644ea4aafa672e9}, doi = {10.3354/meps07826}, issn = {01718630}, year = {2009}, date = {2009-01-01}, journal = {Marine Ecology Progress Series}, volume = {382}, pages = {225--238}, abstract = {We describe an integrated database on European macrobenthic fauna, developed within the framework of the European Network of Excellence MarBEF, and the data and data integration exercise that provided its content. A total of 44 datasets including 465 354 distribution records from soft-bottom macrobenthic species were uploaded into the relational MacroBen database, corresponding to 22 897 sampled stations from all European seas, and 7203 valid taxa. All taxonomic names were linked to the European Register of Marine Species, which was used as the taxonomic reference to standardise spelling and harmonise synonymy. An interface was created, allowing the user to explore, subselect, export and analyse the data by calculating different indices. Although the sampling techniques and intended use of the datasets varied tremendously, the integrated database proved to be robust, and an important tool for studying and understanding large-scale long-term distributions and abundances of marine benthic life. Crucial in the process was the willingness and the positive data-sharing attitude of the different data contributors. Development of a data policy that is highly aware of sensitivities and ownership issues of data providers was essential in the creation of this goodwill. © Inter-Research 2009.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We describe an integrated database on European macrobenthic fauna, developed within the framework of the European Network of Excellence MarBEF, and the data and data integration exercise that provided its content. A total of 44 datasets including 465 354 distribution records from soft-bottom macrobenthic species were uploaded into the relational MacroBen database, corresponding to 22 897 sampled stations from all European seas, and 7203 valid taxa. All taxonomic names were linked to the European Register of Marine Species, which was used as the taxonomic reference to standardise spelling and harmonise synonymy. An interface was created, allowing the user to explore, subselect, export and analyse the data by calculating different indices. Although the sampling techniques and intended use of the datasets varied tremendously, the integrated database proved to be robust, and an important tool for studying and understanding large-scale long-term distributions and abundances of marine benthic life. Crucial in the process was the willingness and the positive data-sharing attitude of the different data contributors. Development of a data policy that is highly aware of sensitivities and ownership issues of data providers was essential in the creation of this goodwill. © Inter-Research 2009. |
Poulos, S E; Dounas, C G; Alexandrakis, G; Koulouri, P; Drakopoulos, P Trace metal distribution in sediments of northern continental shelf of Crete Island, Eastern Mediterranean Journal Article Environmental Geology, 58 (4), pp. 843–857, 2009, ISSN: 09430105. @article{poulos_trace_2009, title = {Trace metal distribution in sediments of northern continental shelf of Crete Island, Eastern Mediterranean}, author = {S E Poulos and C G Dounas and G Alexandrakis and P Koulouri and P Drakopoulos}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-70349977828&doi=10.1007%2fs00254-008-1560-1&partnerID=40&md5=a02cba4a84ee83b936e7c8f46034715c}, doi = {10.1007/s00254-008-1560-1}, issn = {09430105}, year = {2009}, date = {2009-01-01}, journal = {Environmental Geology}, volume = {58}, number = {4}, pages = {843--857}, abstract = {The present study investigates the distribution of trace metals (Zn, Hg, Cd, Cu, and Pb), as indicators of pollution, in the surficial offshore shelf sediments along the northern coast of Heraklion Prefecture (Crete, Mediterranean Sea). The concentrations and the spatial distribution of the different trace metals, in relation to the sedimentological characteristics and the water circulation pattern of the entire continental shelf, are associated with human inshore sources of pollutants located along the coastline of the study area. Although the trace metal concentrations measured are higher than the background values, they are not considered to be dangerous to human health, as they are lower than the standard values given by the World Health Organisation, with only a few localised exceptions. Furthermore, results reveal the important role of local hydrodynamism that moves fine-grained material and associated trace metals offshore (seawards to wave breaking zone) and then transports them eastwards by entrapping them in the prevailing offshore shelf-water circulation. © Springer-Verlag 2008.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The present study investigates the distribution of trace metals (Zn, Hg, Cd, Cu, and Pb), as indicators of pollution, in the surficial offshore shelf sediments along the northern coast of Heraklion Prefecture (Crete, Mediterranean Sea). The concentrations and the spatial distribution of the different trace metals, in relation to the sedimentological characteristics and the water circulation pattern of the entire continental shelf, are associated with human inshore sources of pollutants located along the coastline of the study area. Although the trace metal concentrations measured are higher than the background values, they are not considered to be dangerous to human health, as they are lower than the standard values given by the World Health Organisation, with only a few localised exceptions. Furthermore, results reveal the important role of local hydrodynamism that moves fine-grained material and associated trace metals offshore (seawards to wave breaking zone) and then transports them eastwards by entrapping them in the prevailing offshore shelf-water circulation. © Springer-Verlag 2008. |
Grémare, A; Labrune, C; Berghe, Vanden E; Amouroux, J M; Bachelet, G; Zettler, M L; Vanaverbeke, J; Fleischer, D; Bigot, L; Maire, O; Deflandre, B; Craeymeersch, J; Degraer, S; Dounas, C; Duineveld, G; Heip, C; Herrmann, M; Hummel, H; Karakassis, I; Kȩdra, M; Kendall, M; Kingston, P; Laudien, J; Occhipinti-Ambrogi, A; Rachor, E; Sardá, R; Speybroeck, J; Hoey, Van G; Vincx, M; Whomersley, P; Willems, W; Włodarska-Kowalczuk, M; Zenetos, A Comparison of the performances of two biotic indices based on the MacroBen database Journal Article Marine Ecology Progress Series, 382 , pp. 297–311, 2009, ISSN: 01718630. @article{gremare_comparison_2009, title = {Comparison of the performances of two biotic indices based on the MacroBen database}, author = {A Grémare and C Labrune and E Vanden Berghe and J M Amouroux and G Bachelet and M L Zettler and J Vanaverbeke and D Fleischer and L Bigot and O Maire and B Deflandre and J Craeymeersch and S Degraer and C Dounas and G Duineveld and C Heip and M Herrmann and H Hummel and I Karakassis and M Kȩdra and M Kendall and P Kingston and J Laudien and A Occhipinti-Ambrogi and E Rachor and R Sardá and J Speybroeck and G Van Hoey and M Vincx and P Whomersley and W Willems and M Włodarska-Kowalczuk and A Zenetos}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-66649084661&doi=10.3354%2fmeps08030&partnerID=40&md5=7ab0aa02893149a1293341026b18ef35}, doi = {10.3354/meps08030}, issn = {01718630}, year = {2009}, date = {2009-01-01}, journal = {Marine Ecology Progress Series}, volume = {382}, pages = {297--311}, abstract = {The pan-European MacroBen database was used to compare the AZTI Marine Biotic Index (AMBI) and the Benthic Quality Index (BQIES), 2 biotic indices which rely on 2 distinct assessments of species sensitivity/tolerance (i.e. AMBI EG and BQI E[S50]0.05) and which up to now have only been compared on restricted data sets. A total of 12 409 stations were selected from the database. This subset (indicator database) was later divided into 4 marine and 1 estuarine subareas. We computed E(S50) 0.05 in 643 taxa, which accounted for 91.8% of the total abundances in the whole marine indicator database. AMBI EG and E(S50) 0.05correlated poorly. Marked heterogeneities in E(S 50)0.05 between the marine and estuarine North Sea and between the 4 marine subareas suggest that sensitivity/tolerance levels vary among geographical areas. High values of AMBI were always associated with low values of BQIES, which underlines the coherence of these 2 indices in identifying stations with a bad ecological status (ES). Conversely, low values of AMBI were sometimes associated with low values of BQIES resulting in the attribution of a good ES by AMBI and a bad ES by BQIES. This was caused by the dominance of species classified as sensitive by AMBI and tolerant by BQIES. Some of these species are known to be sensitive to natural disturbance, which highlights the tendency of BQIES to automatically classify dominant species as tolerant. Both indices thus present weaknesses in their way of assessing sensitivity/tolerance levels (i.e. existence of a single sensitivity/tolerance list for AMBI and the tight relationship between dominance and tolerance for BQIES). Future studies should focus on the (1) clarification of the sensitivity/tolerance levels of the species identified as problematic, and (2) assessment of the relationships between AMBI EG and E(S50)0.05 within and between combinations of geographical areas and habitats. © Inter-Research 2009.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The pan-European MacroBen database was used to compare the AZTI Marine Biotic Index (AMBI) and the Benthic Quality Index (BQIES), 2 biotic indices which rely on 2 distinct assessments of species sensitivity/tolerance (i.e. AMBI EG and BQI E[S50]0.05) and which up to now have only been compared on restricted data sets. A total of 12 409 stations were selected from the database. This subset (indicator database) was later divided into 4 marine and 1 estuarine subareas. We computed E(S50) 0.05 in 643 taxa, which accounted for 91.8% of the total abundances in the whole marine indicator database. AMBI EG and E(S50) 0.05correlated poorly. Marked heterogeneities in E(S 50)0.05 between the marine and estuarine North Sea and between the 4 marine subareas suggest that sensitivity/tolerance levels vary among geographical areas. High values of AMBI were always associated with low values of BQIES, which underlines the coherence of these 2 indices in identifying stations with a bad ecological status (ES). Conversely, low values of AMBI were sometimes associated with low values of BQIES resulting in the attribution of a good ES by AMBI and a bad ES by BQIES. This was caused by the dominance of species classified as sensitive by AMBI and tolerant by BQIES. Some of these species are known to be sensitive to natural disturbance, which highlights the tendency of BQIES to automatically classify dominant species as tolerant. Both indices thus present weaknesses in their way of assessing sensitivity/tolerance levels (i.e. existence of a single sensitivity/tolerance list for AMBI and the tight relationship between dominance and tolerance for BQIES). Future studies should focus on the (1) clarification of the sensitivity/tolerance levels of the species identified as problematic, and (2) assessment of the relationships between AMBI EG and E(S50)0.05 within and between combinations of geographical areas and habitats. © Inter-Research 2009. |
Webb, T J; Aleffi, I F; Amouroux, J M; Bachelet, G; Degraer, S; Dounas, C; Fleischer, D; Grémare, A; Herrmann, M; Hummel, H; Karakassis, I; Kȩdra, M; Kendall, M A; Kotwicki, L; Labrune, C; Nevrova, E L; Occhipinti-Ambrogi, A; Petrov, A; Revkov, N K; Sardá, R; Simboura, N; Speybroeck, J; Hoey, Van G; Vincx, M; Whomersley, P; Willems, W; Włodarska-Kowalczuk, M Macroecology of the European soft sediment benthos: Insights from the MacroBen database Journal Article Marine Ecology Progress Series, 382 , pp. 287–296, 2009, ISSN: 01718630. @article{webb_macroecology_2009, title = {Macroecology of the European soft sediment benthos: Insights from the MacroBen database}, author = {T J Webb and I F Aleffi and J M Amouroux and G Bachelet and S Degraer and C Dounas and D Fleischer and A Grémare and M Herrmann and H Hummel and I Karakassis and M Kȩdra and M A Kendall and L Kotwicki and C Labrune and E L Nevrova and A Occhipinti-Ambrogi and A Petrov and N K Revkov and R Sardá and N Simboura and J Speybroeck and G Van Hoey and M Vincx and P Whomersley and W Willems and M Włodarska-Kowalczuk}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-66649088624&doi=10.3354%2fmeps07754&partnerID=40&md5=b9bc1d02abca09e64f8734348c9b513d}, doi = {10.3354/meps07754}, issn = {01718630}, year = {2009}, date = {2009-01-01}, journal = {Marine Ecology Progress Series}, volume = {382}, pages = {287--296}, abstract = {Macroecology provides a novel conceptual framework for analysis of the distribution and abundance of organisms at very large scales. Its rapid development in recent years has been driven primarily by studies of terrestrial taxa; the vast potential of marine systems to contribute to the macroecological research effort remains largely untapped. International collaborative efforts such as MarBEF have provided fresh impetus to the collation of regional databases of species occurrences, such as the newly available MacroBen database of the European soft sediment benthic fauna. Here, we provide a first macroecological summary of this unique database. We show that in common with almost all previously analysed assemblages, the frequency distribution of regional site occupancies across species in the MacroBen database is strongly right-skewed. More unusually, this right skew remains under logarithmic transformation. There is little evidence for any major differences between higher taxa in this frequency distribution (based on the 8 animal classes for which we have sufficient data). Indeed, considerable variation in occupancy persisted across the taxonomic hierarchy, such that most variation occurred between species within genera. There was a weak positive relationship between local population density and regional occupancy across species, but this abundance-occupancy relationship varied considerably between higher taxa and between geographical areas. Our results highlight the potential of databases such as MacroBen to consolidate macroecological generalities and to test emerging theory. © Inter-Research 2009.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Macroecology provides a novel conceptual framework for analysis of the distribution and abundance of organisms at very large scales. Its rapid development in recent years has been driven primarily by studies of terrestrial taxa; the vast potential of marine systems to contribute to the macroecological research effort remains largely untapped. International collaborative efforts such as MarBEF have provided fresh impetus to the collation of regional databases of species occurrences, such as the newly available MacroBen database of the European soft sediment benthic fauna. Here, we provide a first macroecological summary of this unique database. We show that in common with almost all previously analysed assemblages, the frequency distribution of regional site occupancies across species in the MacroBen database is strongly right-skewed. More unusually, this right skew remains under logarithmic transformation. There is little evidence for any major differences between higher taxa in this frequency distribution (based on the 8 animal classes for which we have sufficient data). Indeed, considerable variation in occupancy persisted across the taxonomic hierarchy, such that most variation occurred between species within genera. There was a weak positive relationship between local population density and regional occupancy across species, but this abundance-occupancy relationship varied considerably between higher taxa and between geographical areas. Our results highlight the potential of databases such as MacroBen to consolidate macroecological generalities and to test emerging theory. © Inter-Research 2009. |
Renaud, P E; Webb, T J; Bjørgesaeter, A; Karakassis, I; Kȩdra, M; Kendall, M A; Labrune, C; Lampadariou, N; Somerfield, P J; Włodarska-Kowalczuk, M; Berghe, Vanden E; Claus, S; Aleffi, I F; Amouroux, J M; Bryne, K H; Cochrane, S J; Dahle, S; Degraer, S; Denisenko, S G; Deprez, T; Dounas, C; Fleischer, D; Gil, J; Grémare, A; Janas, U; Mackie, A S Y; Palerud, R; Rumohr, H; Sardá, R; Speybroeck, J; Taboada, S; Hoey, Van G; Wȩsławski, J M; Whomersley, P; Zettler, M L Continental-scale patterns in benthic invertebrate diversity: Insights from the MacroBen database Journal Article Marine Ecology Progress Series, 382 , pp. 239–252, 2009, ISSN: 01718630. @article{renaud_continental-scale_2009, title = {Continental-scale patterns in benthic invertebrate diversity: Insights from the MacroBen database}, author = {P E Renaud and T J Webb and A Bjørgesaeter and I Karakassis and M Kȩdra and M A Kendall and C Labrune and N Lampadariou and P J Somerfield and M Włodarska-Kowalczuk and E Vanden Berghe and S Claus and I F Aleffi and J M Amouroux and K H Bryne and S J Cochrane and S Dahle and S Degraer and S G Denisenko and T Deprez and C Dounas and D Fleischer and J Gil and A Grémare and U Janas and A S Y Mackie and R Palerud and H Rumohr and R Sardá and J Speybroeck and S Taboada and G Van Hoey and J M Wȩsławski and P Whomersley and M L Zettler}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-66649135606&doi=10.3354%2fmeps07963&partnerID=40&md5=b8f3d23c02b6e1bc5903130a3be4b607}, doi = {10.3354/meps07963}, issn = {01718630}, year = {2009}, date = {2009-01-01}, journal = {Marine Ecology Progress Series}, volume = {382}, pages = {239--252}, abstract = {Latitudinal clines in species diversity in limnic and terrestrial habitats have been noted for well over a century and are consistent across many taxonomic groups. However, studies in marine systems over the past 2 to 3 decades have yielded equivocal results. We conducted initial analyses of the MarBEF (EU Network of Excellence for Marine Biodiversity and Ecosystem Function) database to test for trends in local and regional diversity over the latitudinal extent of European continental-shelf waters (36° to 81° N). Soft-sediment benthic macrofauna exhibit little evidence of a latitudinal cline in local (α-) diversity measures. Relationships with water depth were relatively strong and complex. Statistically significant latitudinal trends were small and positive, suggesting a modest increase in diversity with latitude once water-depth covariates were removed. These results are consistent regardless of whether subsets of the database were used, replicates were pooled, or component taxonomical groups were evaluated separately. Local and regional diversity measures were significantly and positively correlated. Scientific cooperation through data-sharing is a powerful tool with which to address fundamental ecological and evolutionary questions relating to large-scale patterns and processes. © Inter-Research 2009.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Latitudinal clines in species diversity in limnic and terrestrial habitats have been noted for well over a century and are consistent across many taxonomic groups. However, studies in marine systems over the past 2 to 3 decades have yielded equivocal results. We conducted initial analyses of the MarBEF (EU Network of Excellence for Marine Biodiversity and Ecosystem Function) database to test for trends in local and regional diversity over the latitudinal extent of European continental-shelf waters (36° to 81° N). Soft-sediment benthic macrofauna exhibit little evidence of a latitudinal cline in local (α-) diversity measures. Relationships with water depth were relatively strong and complex. Statistically significant latitudinal trends were small and positive, suggesting a modest increase in diversity with latitude once water-depth covariates were removed. These results are consistent regardless of whether subsets of the database were used, replicates were pooled, or component taxonomical groups were evaluated separately. Local and regional diversity measures were significantly and positively correlated. Scientific cooperation through data-sharing is a powerful tool with which to address fundamental ecological and evolutionary questions relating to large-scale patterns and processes. © Inter-Research 2009. |
Koulouri, P; Dounas, C; Radin, F; Eleftheriou, A Journal of Plankton Research, 31 (7), pp. 753–762, 2009, ISSN: 01427873. @article{koulouri_near-bottom_2009, title = {Near-bottom zooplankton in the continental shelf and upper slope of Heraklion Bay (Crete, Greece, Eastern Mediterranean): Observations on vertical distribution patterns}, author = {P Koulouri and C Dounas and F Radin and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-71949108098&doi=10.1093%2fplankt%2ffbp023&partnerID=40&md5=6709d309388da3aa69f40df0ded21fb4}, doi = {10.1093/plankt/fbp023}, issn = {01427873}, year = {2009}, date = {2009-01-01}, journal = {Journal of Plankton Research}, volume = {31}, number = {7}, pages = {753--762}, abstract = {Near-bottom zooplankton sampled by a newly developed hyperbenthic sledge (TTSS2) on the continental shelf (50-200 m) and upper slope (300 m) of Heraklion Bay (Crete, Eastern Mediterranean) consisted of both meso- and macro-zooplankton. Meso-zooplankton was composed mainly of calanoid copepods and crustacean larvae, while macro-zooplankton consisted almost exclusively of chaetognaths. Results revealed that near-bottom zooplankton is found in very high densities close to the seabed and especially on or just a few centimetres above the sediment surface. Furthermore, near-bottom zooplankton abundance was significantly higher during the night than during the day implying that the performance of "reversed" diel vertical migration by these animals is probably due to the presence of predators that use tactile stimuli, rather than vision, to locate prey.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Near-bottom zooplankton sampled by a newly developed hyperbenthic sledge (TTSS2) on the continental shelf (50-200 m) and upper slope (300 m) of Heraklion Bay (Crete, Eastern Mediterranean) consisted of both meso- and macro-zooplankton. Meso-zooplankton was composed mainly of calanoid copepods and crustacean larvae, while macro-zooplankton consisted almost exclusively of chaetognaths. Results revealed that near-bottom zooplankton is found in very high densities close to the seabed and especially on or just a few centimetres above the sediment surface. Furthermore, near-bottom zooplankton abundance was significantly higher during the night than during the day implying that the performance of "reversed" diel vertical migration by these animals is probably due to the presence of predators that use tactile stimuli, rather than vision, to locate prey. |
Somerfield, P J; Arvanitidis, C; Faulwetter, S; Chatzigeorgiou, G; Vasileiadou, A; Amouroux, J M; Anisimova, N; Cochrane, S J; Craeymeersch, J; Dahle, S; Denisenko, S; Dounas, K; Duineveld, G; Grémare, A; Heip, C H R; Herrmann, M; Karakassis, I; Kȩdra, M; Kendall, M A; Kingston, P; Kotwicki, L; Labrune, C; Laudien, J; Nevrova, H; Nicolaidou, A; Occhipinti-Ambrogi, A; Palerud, R; Petrov, A; Rachor, E; Revkov, N; Rumohr, H; Sardá, R; Janas, U; Berghe, Vanden E; Włodarska-Kowalczuk, M Assessing evidence for random assembly of marine benthic communities from regional species pools Journal Article Marine Ecology Progress Series, 382 , pp. 279–286, 2009, ISSN: 01718630. @article{somerfield_assessing_2009, title = {Assessing evidence for random assembly of marine benthic communities from regional species pools}, author = {P J Somerfield and C Arvanitidis and S Faulwetter and G Chatzigeorgiou and A Vasileiadou and J M Amouroux and N Anisimova and S J Cochrane and J Craeymeersch and S Dahle and S Denisenko and K Dounas and G Duineveld and A Grémare and C H R Heip and M Herrmann and I Karakassis and M Kȩdra and M A Kendall and P Kingston and L Kotwicki and C Labrune and J Laudien and H Nevrova and A Nicolaidou and A Occhipinti-Ambrogi and R Palerud and A Petrov and E Rachor and N Revkov and H Rumohr and R Sardá and U Janas and E Vanden Berghe and M Włodarska-Kowalczuk}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-66649136488&doi=10.3354%2fmeps07934&partnerID=40&md5=dcce15cc6eb45417bba0ef6f162fb1df}, doi = {10.3354/meps07934}, issn = {01718630}, year = {2009}, date = {2009-01-01}, journal = {Marine Ecology Progress Series}, volume = {382}, pages = {279--286}, abstract = {Local species diversity may be determined by processes operating locally, such as disturbance, predation and competition, or by regional processes, such as environmental structuring or history. Classical theory focusing on competition predicts that the species combining to form communities will be less similar to each other than they would be if they were assembled at random from a regional species pool. Theory focusing on environmental structuring predicts that species will be more similar to each other than expected by chance. A randomisation test that determines the extent to which local species lists represent random selections from a regional list, based on the average relatedness between species, was applied to data held in the MacroBen database. Little or no evidence was found for species lists of whole faunas at any scale being random subsets of species lists at larger scales. Species tend to be more closely related to each other than would be expected if they were assembled at random. Thus marine soft-sediment macrofauna are not locally assembled at random from regional species pools and it is likely that regional processes determine the assembly of communities. Focusing on the most abundant class within the macrofauna, a different pattern emerges, in that there is a much stronger tendency for local polychaete composition to be a random subset from regional pools at all scales. Thus it is not possible to determine whether local polychaete diversity is independent of both local and regional processes, or determined by a combination of both acting antagonistically. © Inter-Research 2009.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Local species diversity may be determined by processes operating locally, such as disturbance, predation and competition, or by regional processes, such as environmental structuring or history. Classical theory focusing on competition predicts that the species combining to form communities will be less similar to each other than they would be if they were assembled at random from a regional species pool. Theory focusing on environmental structuring predicts that species will be more similar to each other than expected by chance. A randomisation test that determines the extent to which local species lists represent random selections from a regional list, based on the average relatedness between species, was applied to data held in the MacroBen database. Little or no evidence was found for species lists of whole faunas at any scale being random subsets of species lists at larger scales. Species tend to be more closely related to each other than would be expected if they were assembled at random. Thus marine soft-sediment macrofauna are not locally assembled at random from regional species pools and it is likely that regional processes determine the assembly of communities. Focusing on the most abundant class within the macrofauna, a different pattern emerges, in that there is a much stronger tendency for local polychaete composition to be a random subset from regional pools at all scales. Thus it is not possible to determine whether local polychaete diversity is independent of both local and regional processes, or determined by a combination of both acting antagonistically. © Inter-Research 2009. |
2008 |
Faulwetter, S; Gotsis, P; Reizopoulou, S; Orfanidis, S; Kevrekidis, T; Nicolaidou, A; Simboura, N; Malea, P; Dounas, C; Mogias, A; Valavanis, V; Arvanitidis, C Aquatic Conservation: Marine and Freshwater Ecosystems, 18 (SUPPL. 1), pp. S135–S142, 2008, ISSN: 10527613. @article{faulwetter_elnet_2008, title = {ElNet: The Greek biodiversity transitional waters information system. An exemplar for the development of distributed information networks in Europe}, author = {S Faulwetter and P Gotsis and S Reizopoulou and S Orfanidis and T Kevrekidis and A Nicolaidou and N Simboura and P Malea and C Dounas and A Mogias and V Valavanis and C Arvanitidis}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-51649091896&doi=10.1002%2faqc.950&partnerID=40&md5=915c8d6c7967b0b89bcc42cd20a019b7}, doi = {10.1002/aqc.950}, issn = {10527613}, year = {2008}, date = {2008-01-01}, journal = {Aquatic Conservation: Marine and Freshwater Ecosystems}, volume = {18}, number = {SUPPL. 1}, pages = {S135--S142}, abstract = {1. Transitional waters are ecosystems of special importance for a number of reasons and require effective management. In Greece, biodiversity and environmental data that help to manage these ecosystems do exist, although they are scattered and not easily accessible. An overarching, publicly accessible system combining all kinds of information has not been available until now. 2. The ElNet system was developed to serve these requirements. The system is a functional application consisting of a comprehensive database and an online interface with an interactive map, and search capabilities for biological and environmental data on Greek transitional waters. Nine datasets have already been integrated and are available online. Data and their metadata are documented and checked for quality to allow comparisons and reduce bias in resulting analyses. 3. The data assembled cover a broad geographical and temporal range, allowing large-scale analyses of transitional waters. These in turn produce new scientific knowledge and provide a sound basis of information for scientists, environmental managers and policy-makers. 4. Examination of the data revealed an overall insufficient quality control practice during data acquisition and digitization. A good data management and archive system can significantly improve the quality of data. To encourage scientists to submit their data to a data management centre, a clear data policy document regulating rights and duties could form an incentive for data sharing. 5. Results from a case study carried out on the macrobenthic inventories of the lagoonal systems included in the system demonstrate the potential use of this simple type of information by environmental managers and scientists. 6. The system, still in its initial phase, will be improved by integrating new datasets and developing tools for data retrieval and analyses. The database will be linked to other biodiversity databases to participate in a distributed information network and disseminate the information through other global biodiversity portals. Copyright © 2008 John Wiley & Sons, Ltd.}, keywords = {}, pubstate = {published}, tppubtype = {article} } 1. Transitional waters are ecosystems of special importance for a number of reasons and require effective management. In Greece, biodiversity and environmental data that help to manage these ecosystems do exist, although they are scattered and not easily accessible. An overarching, publicly accessible system combining all kinds of information has not been available until now. 2. The ElNet system was developed to serve these requirements. The system is a functional application consisting of a comprehensive database and an online interface with an interactive map, and search capabilities for biological and environmental data on Greek transitional waters. Nine datasets have already been integrated and are available online. Data and their metadata are documented and checked for quality to allow comparisons and reduce bias in resulting analyses. 3. The data assembled cover a broad geographical and temporal range, allowing large-scale analyses of transitional waters. These in turn produce new scientific knowledge and provide a sound basis of information for scientists, environmental managers and policy-makers. 4. Examination of the data revealed an overall insufficient quality control practice during data acquisition and digitization. A good data management and archive system can significantly improve the quality of data. To encourage scientists to submit their data to a data management centre, a clear data policy document regulating rights and duties could form an incentive for data sharing. 5. Results from a case study carried out on the macrobenthic inventories of the lagoonal systems included in the system demonstrate the potential use of this simple type of information by environmental managers and scientists. 6. The system, still in its initial phase, will be improved by integrating new datasets and developing tools for data retrieval and analyses. The database will be linked to other biodiversity databases to participate in a distributed information network and disseminate the information through other global biodiversity portals. Copyright © 2008 John Wiley & Sons, Ltd. |
Evagelopoulos, A; Koutsoubas, D; Basset, A; Pinna, M; Dimitriadis, C; Sangiorgio, F; Barbone, E; Maidanou, M; Koulouri, P; Dounas, C Spatial and seasonal variability of the macrobenthic fauna in Mediterranean solar saltworks ecosystems Journal Article Aquatic Conservation: Marine and Freshwater Ecosystems, 18 (SUPPL. 1), pp. S118–S134, 2008, ISSN: 10527613. @article{evagelopoulos_spatial_2008, title = {Spatial and seasonal variability of the macrobenthic fauna in Mediterranean solar saltworks ecosystems}, author = {A Evagelopoulos and D Koutsoubas and A Basset and M Pinna and C Dimitriadis and F Sangiorgio and E Barbone and M Maidanou and P Koulouri and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-51649085059&doi=10.1002%2faqc.948&partnerID=40&md5=2d6b0577f768f6285a7baa5eb59d9b55}, doi = {10.1002/aqc.948}, issn = {10527613}, year = {2008}, date = {2008-01-01}, journal = {Aquatic Conservation: Marine and Freshwater Ecosystems}, volume = {18}, number = {SUPPL. 1}, pages = {S118--S134}, abstract = {1. Solar saltworks are man-made systems for the production of salt and are characterized by high habitat heterogeneity owing to the existence of a strong salinity/confinement gradient. Although solar saltworks are considered to be artificial systems, they are also coastal aquatic ecosystems sharing common characteristics with natural transitional waters ecosystems, which are of special interest to the Water Framework Directive (2000/60/EC). 2. Spatial and seasonal distribution of macrobenthic invertebrates in relation to the abiotic environment of two Mediterranean solar saltworks ecosystems were assessed in this study. The spatial distribution investigated in this study ranged from the regional scale (Kalloni Saltworks, NE Aegean and Margherita di Savoia Saltworks, S. Adriatic) down to a local scale of 100s of metres in each ecosystem. 3. The macrobenthic community was variable at most spatial and seasonal scales examined in this study: spatial variability at the regional level was greater than seasonal variability within ecosystems and spatial variability among the salinity/confinement gradient levels was greater than within-level variability. 4. The abiotic environment, in both its spatial and seasonal aspects, was found to be crucial in determining the macrobenthic community structure. Biotic factors such as the life cycle of key species, the inter-specific competition as well as dispersion/colonization/extinction processes were also found to play an important role in structuring the macrobenthic fauna both in space and time. 5. A strong similarity of the macroinvertebrate faunal composition and community structure of the lower salinity ponds of solar saltworks with that of natural transitional waters ecosystems was observed. Therefore, solar saltworks ecosystems can be considered as important sites of study for the purposes of the Water Framework Directive. Copyright © 2008 John Wiley & Sons, Ltd.}, keywords = {}, pubstate = {published}, tppubtype = {article} } 1. Solar saltworks are man-made systems for the production of salt and are characterized by high habitat heterogeneity owing to the existence of a strong salinity/confinement gradient. Although solar saltworks are considered to be artificial systems, they are also coastal aquatic ecosystems sharing common characteristics with natural transitional waters ecosystems, which are of special interest to the Water Framework Directive (2000/60/EC). 2. Spatial and seasonal distribution of macrobenthic invertebrates in relation to the abiotic environment of two Mediterranean solar saltworks ecosystems were assessed in this study. The spatial distribution investigated in this study ranged from the regional scale (Kalloni Saltworks, NE Aegean and Margherita di Savoia Saltworks, S. Adriatic) down to a local scale of 100s of metres in each ecosystem. 3. The macrobenthic community was variable at most spatial and seasonal scales examined in this study: spatial variability at the regional level was greater than seasonal variability within ecosystems and spatial variability among the salinity/confinement gradient levels was greater than within-level variability. 4. The abiotic environment, in both its spatial and seasonal aspects, was found to be crucial in determining the macrobenthic community structure. Biotic factors such as the life cycle of key species, the inter-specific competition as well as dispersion/colonization/extinction processes were also found to play an important role in structuring the macrobenthic fauna both in space and time. 5. A strong similarity of the macroinvertebrate faunal composition and community structure of the lower salinity ponds of solar saltworks with that of natural transitional waters ecosystems was observed. Therefore, solar saltworks ecosystems can be considered as important sites of study for the purposes of the Water Framework Directive. Copyright © 2008 John Wiley & Sons, Ltd. |
2007 |
Drakopoulos, PG; Chandrinos, A; Dounas, C; Koulouras, G; Nomikos, C; Poulos, S; Sianoudis, I; Thanos, I; Zervakis, V Design and realization of an expensive transmittance and fluorescence meter: initial reporting Inproceedings Rapp. Comm. Int. Mer Médit., pp. 139, Istanbul, Turkey, 2007. @inproceedings{drakopoulos_design_2007, title = {Design and realization of an expensive transmittance and fluorescence meter: initial reporting}, author = {PG Drakopoulos and A Chandrinos and C Dounas and G Koulouras and C Nomikos and S Poulos and I Sianoudis and I Thanos and V Zervakis}, year = {2007}, date = {2007-04-01}, booktitle = {Rapp. Comm. Int. Mer Médit.}, volume = {38}, pages = {139}, address = {Istanbul, Turkey}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Dounas, C; Davies, I; Triantafyllou, G; Koulouri, P; Petihakis, G; Arvanitidis, C; Sourlatzis, G; Eleftheriou, A Large-scale impacts of bottom trawling on shelf primary productivity Journal Article Continental Shelf Research, 27 (17), pp. 2198–2210, 2007, ISSN: 02784343. @article{dounas_large-scale_2007, title = {Large-scale impacts of bottom trawling on shelf primary productivity}, author = {C Dounas and I Davies and G Triantafyllou and P Koulouri and G Petihakis and C Arvanitidis and G Sourlatzis and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-34648836863&doi=10.1016%2fj.csr.2007.05.006&partnerID=40&md5=a703ee6ad51b8813b094665c60804525}, doi = {10.1016/j.csr.2007.05.006}, issn = {02784343}, year = {2007}, date = {2007-01-01}, journal = {Continental Shelf Research}, volume = {27}, number = {17}, pages = {2198--2210}, abstract = {Disturbance of the seabed resulting from bottom trawling affects ecosystem processes, such as the rate and magnitude of nutrient regeneration. The potential responses of the plankton community arising from such effects can be modelled, provided that reliable data on the effects on nutrient fluxes are available. In a north Cretan outer continental shelf and upper slope fishing ground (Heraklion Bay, Crete, Eastern Mediterranean) we applied a new field instrument which can simulate the passage of trawl groundropes across the sea floor and made direct seasonal measurements of the rate of dissolved and particulate nutrient releases resulting from seabed disturbance. These observational data were then integrated in a 3D ecosystem model. Results revealed that bottom trawling may trigger off considerable productivity pulses, in addition to pulses from the natural seasonal cycle. © 2007 Elsevier Ltd. All rights reserved.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Disturbance of the seabed resulting from bottom trawling affects ecosystem processes, such as the rate and magnitude of nutrient regeneration. The potential responses of the plankton community arising from such effects can be modelled, provided that reliable data on the effects on nutrient fluxes are available. In a north Cretan outer continental shelf and upper slope fishing ground (Heraklion Bay, Crete, Eastern Mediterranean) we applied a new field instrument which can simulate the passage of trawl groundropes across the sea floor and made direct seasonal measurements of the rate of dissolved and particulate nutrient releases resulting from seabed disturbance. These observational data were then integrated in a 3D ecosystem model. Results revealed that bottom trawling may trigger off considerable productivity pulses, in addition to pulses from the natural seasonal cycle. © 2007 Elsevier Ltd. All rights reserved. |
Drakopoulos, PG; Chandrinos, A; Dounas, C; Nomikos, C; Poulos, S; Thanos, I; Zervakis, V An inexpensive transmítanse and fluorescente meter Inproceedings Proceedings of the 10th International Conference on Environmental Science and Technology, Kos Island, Greece, 5-7 September, pp. B120–B126., 2007. @inproceedings{drakopoulos_inexpensive_2007, title = {An inexpensive transmítanse and fluorescente meter}, author = {PG Drakopoulos and A Chandrinos and C Dounas and C Nomikos and S Poulos and I Thanos and V Zervakis}, year = {2007}, date = {2007-01-01}, booktitle = {Proceedings of the 10th International Conference on Environmental Science and Technology, Kos Island, Greece, 5-7 September}, pages = {B120--B126.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Drakopoulos, PG; Dounas, C; Nomikos, C; Poulos, S; Stefanou, E; Thanos, I; Zervakis, V A transmittance and fluorescence meter for environmental monitoring Inproceedings Proceedings of the International Conference on Environmental Management, Engineering, Planning and Economics, Skiathos, Greece, 24-28 June, pp. 2633–2638, 2007. @inproceedings{drakopoulos_transmittance_2007, title = {A transmittance and fluorescence meter for environmental monitoring}, author = {PG Drakopoulos and C Dounas and C Nomikos and S Poulos and E Stefanou and I Thanos and V Zervakis}, year = {2007}, date = {2007-01-01}, booktitle = {Proceedings of the International Conference on Environmental Management, Engineering, Planning and Economics, Skiathos, Greece, 24-28 June}, pages = {2633--2638}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
2006 |
Koulouri, P; Dounas, C; Arvanitidis, C; Koutsoubas, D; Eleftheriou, A Molluscan diversity along a Mediterranean soft bottom sublittoral ecotone Journal Article Scientia Marina, 70 (4), pp. 573–583, 2006, ISSN: 02148358, (Publisher: CSIC Consejo Superior de Investigaciones Cientificas 2). @article{koulouri_molluscan_2006, title = {Molluscan diversity along a Mediterranean soft bottom sublittoral ecotone}, author = {P Koulouri and C Dounas and C Arvanitidis and D Koutsoubas and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33846020553&doi=10.3989%2fscimar.2006.70n4573&partnerID=40&md5=7281e64db760bd5bee1e6b6611feef33}, doi = {10.3989/scimar.2006.70n4573}, issn = {02148358}, year = {2006}, date = {2006-01-01}, journal = {Scientia Marina}, volume = {70}, number = {4}, pages = {573--583}, abstract = {Molluscan diversity associated with sublittoral soft-bottoms was studied in Heraklion Bay as part of a long-term multidisciplinary research programme in the coastal environment of northern Crete (eastern Mediterranean). Quantitative benthic samples were collected in a pilot survey from a grid of 28 stations, followed by a seasonal sampling carried out over a seven- station transect located from 10 to 40 m depth. Univariate and multivariate analyses indicated the presence of a clear zonation along the depth gradient for the molluscan fauna and three main associations were identified in bathymetric zones parallel to the coastline. The structure of the local molluscan communities revealed the existence of an extended transition zone (ecotone) between a shallow sandy association and a deeper muddy one and a functional pattern, based on the feeding guilds, was evident along the environmental gradient. Application of graphical techniques, by using molluscan taxocoenosis, indicated a rather naturally disturbed habitat. Beta-diversity measures indicated different seasonal community adaptations to the prevailing environmental conditions. Results derived from this study revealed that beta-diversity may be a good descriptor for the assessment of the strength and breadth of sublittoral transition zones along environmental gradients.}, note = {Publisher: CSIC Consejo Superior de Investigaciones Cientificas 2}, keywords = {}, pubstate = {published}, tppubtype = {article} } Molluscan diversity associated with sublittoral soft-bottoms was studied in Heraklion Bay as part of a long-term multidisciplinary research programme in the coastal environment of northern Crete (eastern Mediterranean). Quantitative benthic samples were collected in a pilot survey from a grid of 28 stations, followed by a seasonal sampling carried out over a seven- station transect located from 10 to 40 m depth. Univariate and multivariate analyses indicated the presence of a clear zonation along the depth gradient for the molluscan fauna and three main associations were identified in bathymetric zones parallel to the coastline. The structure of the local molluscan communities revealed the existence of an extended transition zone (ecotone) between a shallow sandy association and a deeper muddy one and a functional pattern, based on the feeding guilds, was evident along the environmental gradient. Application of graphical techniques, by using molluscan taxocoenosis, indicated a rather naturally disturbed habitat. Beta-diversity measures indicated different seasonal community adaptations to the prevailing environmental conditions. Results derived from this study revealed that beta-diversity may be a good descriptor for the assessment of the strength and breadth of sublittoral transition zones along environmental gradients. |
Thessalou-Legaki, M; Zenetos, A; Kambouroglou, V; Corsini-Foka, M; Kouraklis, P; Dounas, C; Nicolaidou, A The establishment of the invasive crab Percnon gibbesi (Ħ. Milne Edwards, 1853) (Crustacea: Decapoda: Grapsidae) in Greek waters Journal Article Aquatic Invasions, 1 (3), pp. 133–136, 2006, ISSN: 17986540, (Publisher: Regional Euro-Asian Biological Invasions Centre). @article{thessalou-legaki_establishment_2006, title = {The establishment of the invasive crab Percnon gibbesi (Ħ. Milne Edwards, 1853) (Crustacea: Decapoda: Grapsidae) in Greek waters}, author = {M Thessalou-Legaki and A Zenetos and V Kambouroglou and M Corsini-Foka and P Kouraklis and C Dounas and A Nicolaidou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-40449137471&doi=10.3391%2fai.2006.1.3.6&partnerID=40&md5=e33e3fa817848ac61925caf3502b2991}, doi = {10.3391/ai.2006.1.3.6}, issn = {17986540}, year = {2006}, date = {2006-01-01}, journal = {Aquatic Invasions}, volume = {1}, number = {3}, pages = {133--136}, abstract = {The tropical Atlantic grapsid crab Percnon gibbesi (H. Milne Edwards, 1853) may be regarded as the most invasive decapod currently expanding its distribution in the Mediterranean Sea. The present paper records its presence in Greek waters since 2004. The species seems well established along the coasts of Messiniakos Gulf, Crete and Rhodes Islands as several individuals of various sizes were observed on shallow, rocky bottoms. The proximity of these localities to ports may hint at shipping as potential vector, but larval transport from already established populations across the Ionian Sea cannot be excluded. The wide adaptability, the potential for colonising new habitats and the population dynamics of P. gibbesi merit further investigation. © 2006 The Author(s).}, note = {Publisher: Regional Euro-Asian Biological Invasions Centre}, keywords = {}, pubstate = {published}, tppubtype = {article} } The tropical Atlantic grapsid crab Percnon gibbesi (H. Milne Edwards, 1853) may be regarded as the most invasive decapod currently expanding its distribution in the Mediterranean Sea. The present paper records its presence in Greek waters since 2004. The species seems well established along the coasts of Messiniakos Gulf, Crete and Rhodes Islands as several individuals of various sizes were observed on shallow, rocky bottoms. The proximity of these localities to ports may hint at shipping as potential vector, but larval transport from already established populations across the Ionian Sea cannot be excluded. The wide adaptability, the potential for colonising new habitats and the population dynamics of P. gibbesi merit further investigation. © 2006 The Author(s). |
Dounas, Costas A new apparatus for the direct measurement of the effects of otter trawling on benthic nutrient releases Journal Article Journal of Experimental Marine Biology and Ecology, 339 (2), pp. 251–259, 2006, ISSN: 00220981. @article{dounas_new_2006, title = {A new apparatus for the direct measurement of the effects of otter trawling on benthic nutrient releases}, author = {Costas Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33749685725&doi=10.1016%2fj.jembe.2006.07.022&partnerID=40&md5=93ab5ed6f0d53f8556b1223bd75404ec}, doi = {10.1016/j.jembe.2006.07.022}, issn = {00220981}, year = {2006}, date = {2006-01-01}, journal = {Journal of Experimental Marine Biology and Ecology}, volume = {339}, number = {2}, pages = {251--259}, abstract = {An innovative Towed Trawl Simulator Sledge (TTSS) which has been tested in the field is described. The new instrument, which incorporates six water sampling bottles and video observation equipment, is designed to simulate the effects of the passage of otter trawl groundropes over seafloor sediments. The TTSS is towed from a surface vessel at speeds similar to those of commercial trawls and the water bottles, triggered simultaneously by electrical or acoustic signals, collect water samples in the plume of disturbed sediment behind the groundrope. The TTSS has been tested in the continental shelf fishing grounds of Heraklion Bay (Eastern Mediterranean) where quantitative measurements of the physical (sediment resuspension) and chemical (nutrient release) effects on surface sediments caused by the passage of otter trawl groundrope typical of that used in the Cretan fishery trawling were performed. The performance of the TTSS is also validated against an instrumented full-scale trawl. It is suggested that the TTSS should be used for the study and modelling of the effects of otter trawling and similar fishing processes on nutrient supply from seafloor sediments and the resulting ecosystem responses. © 2006 Elsevier B.V. All rights reserved.}, keywords = {}, pubstate = {published}, tppubtype = {article} } An innovative Towed Trawl Simulator Sledge (TTSS) which has been tested in the field is described. The new instrument, which incorporates six water sampling bottles and video observation equipment, is designed to simulate the effects of the passage of otter trawl groundropes over seafloor sediments. The TTSS is towed from a surface vessel at speeds similar to those of commercial trawls and the water bottles, triggered simultaneously by electrical or acoustic signals, collect water samples in the plume of disturbed sediment behind the groundrope. The TTSS has been tested in the continental shelf fishing grounds of Heraklion Bay (Eastern Mediterranean) where quantitative measurements of the physical (sediment resuspension) and chemical (nutrient release) effects on surface sediments caused by the passage of otter trawl groundrope typical of that used in the Cretan fishery trawling were performed. The performance of the TTSS is also validated against an instrumented full-scale trawl. It is suggested that the TTSS should be used for the study and modelling of the effects of otter trawling and similar fishing processes on nutrient supply from seafloor sediments and the resulting ecosystem responses. © 2006 Elsevier B.V. All rights reserved. |
2005 |
Manoudis, G; Antoniadou, Chryssanthi; Dounas, C; Chintiroglou, Chariton Charles Successional stages of experimental artificial reefs deployed in Vistonikos gulf (North SAegean Sea, Greece): Preliminary results Journal Article Belgian Journal of Zoology, 135 , pp. 209–215, 2005. @article{manoudis_successional_2005, title = {Successional stages of experimental artificial reefs deployed in Vistonikos gulf (North SAegean Sea, Greece): Preliminary results}, author = {G Manoudis and Chryssanthi Antoniadou and C Dounas and Chariton Charles Chintiroglou}, year = {2005}, date = {2005-01-01}, journal = {Belgian Journal of Zoology}, volume = {135}, pages = {209--215}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Arvanitidis, C; Chatzigeorgiou, G; Koutsoubas, D; Kevrekidis, T; Dounas, C; Eleftheriou, A; Koulouri, P; Mogias, A Estimating lagoonal biodiversity in Greece: Comparison of rapid assessment techniques Journal Article Helgoland Marine Research, 59 (3), pp. 177–186, 2005, ISSN: 1438387X. @article{arvanitidis_estimating_2005, title = {Estimating lagoonal biodiversity in Greece: Comparison of rapid assessment techniques}, author = {C Arvanitidis and G Chatzigeorgiou and D Koutsoubas and T Kevrekidis and C Dounas and A Eleftheriou and P Koulouri and A Mogias}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-24944557295&doi=10.1007%2fs10152-005-0216-8&partnerID=40&md5=b9d9a7372762c2833f2e6ea1c70d270e}, doi = {10.1007/s10152-005-0216-8}, issn = {1438387X}, year = {2005}, date = {2005-01-01}, journal = {Helgoland Marine Research}, volume = {59}, number = {3}, pages = {177--186}, abstract = {An attempt is made to compare the results of different rapid biodiversity assessment techniques at the pan-Mediterranean, sectorial and local levels. A uniform multivariate pattern exists at the pan-Mediterranean and national (sectorial) levels: lagoons can be different when they host only a few species, but as species numbers increase, lagoons become homogenous in composition. Multivariate techniques cannot distinguish anthropogenically-impacted lagoons from those, which are naturally disturbed. In the pan-Mediterranean context it is the higher taxonomic levels, but in the national and local context it is the most abundant macrobenthic groups (polychaetes, molluscs and crustaceans) and meiobenthos which provide patterns closest to that derived from the species level. Taxonomic distinctness indices applied to polychaete and mollusc inventories provide meaningful results at most levels and scales of observation. These indices seem to be robust enough to discriminate anthropogenically impacted from naturally disturbed lagoons. © Springer-Verlag and AWI 2005.}, keywords = {}, pubstate = {published}, tppubtype = {article} } An attempt is made to compare the results of different rapid biodiversity assessment techniques at the pan-Mediterranean, sectorial and local levels. A uniform multivariate pattern exists at the pan-Mediterranean and national (sectorial) levels: lagoons can be different when they host only a few species, but as species numbers increase, lagoons become homogenous in composition. Multivariate techniques cannot distinguish anthropogenically-impacted lagoons from those, which are naturally disturbed. In the pan-Mediterranean context it is the higher taxonomic levels, but in the national and local context it is the most abundant macrobenthic groups (polychaetes, molluscs and crustaceans) and meiobenthos which provide patterns closest to that derived from the species level. Taxonomic distinctness indices applied to polychaete and mollusc inventories provide meaningful results at most levels and scales of observation. These indices seem to be robust enough to discriminate anthropogenically impacted from naturally disturbed lagoons. © Springer-Verlag and AWI 2005. |
Arvanitidis, C; Atzigeorgiou, G; Koutsoubas, D; Dounas, C; Eleftheriou, A; Koulouri, P Mediterranean lagoons revisited: Weakness and efficiency of the rapid biodiversity assessment techniques in a severely fluctuating environment Journal Article Biodiversity and Conservation, 14 (10), pp. 2347–2359, 2005, ISSN: 09603115. @article{arvanitidis_mediterranean_2005, title = {Mediterranean lagoons revisited: Weakness and efficiency of the rapid biodiversity assessment techniques in a severely fluctuating environment}, author = {C Arvanitidis and G Atzigeorgiou and D Koutsoubas and C Dounas and A Eleftheriou and P Koulouri}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-24944484401&doi=10.1007%2fs10531-004-1668-x&partnerID=40&md5=164959659412afbcf4b012e66162f526}, doi = {10.1007/s10531-004-1668-x}, issn = {09603115}, year = {2005}, date = {2005-01-01}, journal = {Biodiversity and Conservation}, volume = {14}, number = {10}, pages = {2347--2359}, abstract = {The purpose of this paper is to test the performance of rapid biodiversity assessment techniques in the lagoonal environment at the pan-Mediterranean scale. The multivariate techniques can produce patterns of lagoonal biodiversity along the Mediterranean. Additionally, it is shown that the polychaete inventory can preferably be used rather than the aggregation of information at the family level for the purposes of rapid biodiversity assessment. These techniques, however, appear to be weak for the environmental assessment because they cannot detect differences between the naturally disturbed and the anthropogenically impacted lagoons. Both taxonomic distinctness indices are found to be robust in providing meaningful results for rapid biodiversity/environmental assessment when the crustacean inventory and the polychaete and molluscan ones are used for the estimation of the average taxonomic distinctness and of the variation in taxonomic distinctness values, correspondingly. Conversely, information on the distribution of the macrofaunal species to the Mediterranean lagoons appears to be inadequate for the needs of such rapid biodiversity assessment at a regional scale. It is suggested that information on ecological convergence of the macrofaunal species would probably provide biodiversity indices with additional power, at least in the lagoonal environment. © Springer 2005.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The purpose of this paper is to test the performance of rapid biodiversity assessment techniques in the lagoonal environment at the pan-Mediterranean scale. The multivariate techniques can produce patterns of lagoonal biodiversity along the Mediterranean. Additionally, it is shown that the polychaete inventory can preferably be used rather than the aggregation of information at the family level for the purposes of rapid biodiversity assessment. These techniques, however, appear to be weak for the environmental assessment because they cannot detect differences between the naturally disturbed and the anthropogenically impacted lagoons. Both taxonomic distinctness indices are found to be robust in providing meaningful results for rapid biodiversity/environmental assessment when the crustacean inventory and the polychaete and molluscan ones are used for the estimation of the average taxonomic distinctness and of the variation in taxonomic distinctness values, correspondingly. Conversely, information on the distribution of the macrofaunal species to the Mediterranean lagoons appears to be inadequate for the needs of such rapid biodiversity assessment at a regional scale. It is suggested that information on ecological convergence of the macrofaunal species would probably provide biodiversity indices with additional power, at least in the lagoonal environment. © Springer 2005. |
Dounas, C; Davies, I; Hayes, P; Arvanitidis, C; Koulouri, P The effect of different types of otter trawl groundrope on benthic nutrient fluxes and sediment biogeochemistry Journal Article American Fisheries Society Symposium, 41 , pp. 539–544, 2005. @article{dounas_effect_2005, title = {The effect of different types of otter trawl groundrope on benthic nutrient fluxes and sediment biogeochemistry}, author = {C Dounas and I Davies and P Hayes and C Arvanitidis and P Koulouri}, url = {http://fisheries.org/shop/x54041xm}, year = {2005}, date = {2005-01-01}, journal = {American Fisheries Society Symposium}, volume = {41}, pages = {539--544}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Koulouri, P; Dounas, C; Eleftheriou, A Preliminary results on the effect of otter trawling on hyperbenthic communities in Heraklion Bay (Eastern Mediterranean, Cretan Sea) Journal Article American Fisheries Society Symposium, 41 , pp. 529–537, 2005. @article{koulouri_preliminary_2005, title = {Preliminary results on the effect of otter trawling on hyperbenthic communities in Heraklion Bay (Eastern Mediterranean, Cretan Sea)}, author = {P Koulouri and C Dounas and A Eleftheriou}, year = {2005}, date = {2005-01-01}, journal = {American Fisheries Society Symposium}, volume = {41}, pages = {529--537}, abstract = {Although the benthopelagic fish species are a focus of commercial exploitation, relatively little attention has been paid to the small-sized invertebrates (0.5-20mm) living on or very close to the seabed, thus inhabiting the same biotope, known as well as “hyperbenthos”. Recently interest in this faunal group has increased, as many demersal fish and epibenthic crustaceans have been found to feed on hyperbenthic animals, for at least part of their lives. Otter trawls, the most common gear used for demersal fishing, result in significant disturbance of the sediment-water interface. Animals that are disturbed by the passage of a trawl may become more available to predators and scavengers. We have been unable to find any reports of studies of the impacts of towed fishing gears, including otter trawls, on hyperbenthos. We studied these effects on the Mediterranean continental shelf in Heraklion Bay (Cretan Sea), using a novel apparatus to simulate the contact of otter trawl groundrope with the sea bed. A modified three-level hyperbenthic sledge was used for collecting disturbed (groundrope present) and undisturbed (without groundrope) macrofaunal samples at a towing speed typical of the local commercial vessels. Observations were made in an area being actively fished, before and during the trawling season. The preliminary results reported here indicate that trawling causes significant changes in the structure of hyperbenthic communities.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Although the benthopelagic fish species are a focus of commercial exploitation, relatively little attention has been paid to the small-sized invertebrates (0.5-20mm) living on or very close to the seabed, thus inhabiting the same biotope, known as well as “hyperbenthos”. Recently interest in this faunal group has increased, as many demersal fish and epibenthic crustaceans have been found to feed on hyperbenthic animals, for at least part of their lives. Otter trawls, the most common gear used for demersal fishing, result in significant disturbance of the sediment-water interface. Animals that are disturbed by the passage of a trawl may become more available to predators and scavengers. We have been unable to find any reports of studies of the impacts of towed fishing gears, including otter trawls, on hyperbenthos. We studied these effects on the Mediterranean continental shelf in Heraklion Bay (Cretan Sea), using a novel apparatus to simulate the contact of otter trawl groundrope with the sea bed. A modified three-level hyperbenthic sledge was used for collecting disturbed (groundrope present) and undisturbed (without groundrope) macrofaunal samples at a towing speed typical of the local commercial vessels. Observations were made in an area being actively fished, before and during the trawling season. The preliminary results reported here indicate that trawling causes significant changes in the structure of hyperbenthic communities. |
2003 |
Arvanitidis, C; Bellan, G; Drakopoulos, P; Valavanis, V; Dounas, C; Koukouras, A; Eleftheriou, A Testing hypotheses on the biodiversity patterns occurring in the Mediterranean and Black Seas: the example of the benthic polychaetes Inproceedings Chersonisos, Crete, Greece, 2003, (Publication Title: Seventh Symposium on Oceanography and Fisheries). @inproceedings{arvanitidis_testing_2003, title = {Testing hypotheses on the biodiversity patterns occurring in the Mediterranean and Black Seas: the example of the benthic polychaetes}, author = {C Arvanitidis and G Bellan and P Drakopoulos and V Valavanis and C Dounas and A Koukouras and A Eleftheriou}, year = {2003}, date = {2003-01-01}, address = {Chersonisos, Crete, Greece}, note = {Publication Title: Seventh Symposium on Oceanography and Fisheries}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Naletaki, M; Koutsoubas, D; Dounas, C; Arvanitidis, C Structure and dynamics of the macrobenthic crustaceans in the Gialova lagoon (SW Peloponnese) Inproceedings Chersonisos, Crete, Greece, 2003, (Publication Title: Seventh Symposium on Oceanography and Fisheries). @inproceedings{naletaki_structure_2003, title = {Structure and dynamics of the macrobenthic crustaceans in the Gialova lagoon (SW Peloponnese)}, author = {M Naletaki and D Koutsoubas and C Dounas and C Arvanitidis}, year = {2003}, date = {2003-01-01}, address = {Chersonisos, Crete, Greece}, note = {Publication Title: Seventh Symposium on Oceanography and Fisheries}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Koulouri, P T; Dounas, C G; Eleftheriou, A S A new apparatus for the direct measurement of otter trawling effects on the epibenthic and hyperbenthic macrofauna Journal Article Journal of the Marine Biological Association of the United Kingdom, 83 (6), pp. 1363–1368, 2003, ISSN: 00253154. @article{koulouri_new_2003, title = {A new apparatus for the direct measurement of otter trawling effects on the epibenthic and hyperbenthic macrofauna}, author = {P T Koulouri and C G Dounas and A S Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-1042267134&doi=10.1017%2fS0025315403008828&partnerID=40&md5=1086ff028266b8fe562a6160f8f82091}, doi = {10.1017/S0025315403008828}, issn = {00253154}, year = {2003}, date = {2003-01-01}, journal = {Journal of the Marine Biological Association of the United Kingdom}, volume = {83}, number = {6}, pages = {1363--1368}, abstract = {A towed trawl simulator sledge (TTSS2) for collecting quantitatively small macrobenthic animals disturbed by the passage of otter trawl groundrope typical of the local fishery is described and illustrated. The TTSS2 was towed from a surface vessel at a speed within the range of commercial trawls, incorporating three sampling nets that open and close by means of an electro-mechanical system. An odometer in contact with the seabed provided a continuous record of the trawled ground. The degree of efficiency of the TTSS2 - by means of the attached groundrope that stirs up the surface of the bottom ahead of the nets -was tested in the northern continental shelf of Crete (eastern Mediterranean). Additional trials with a much heavier groundropc were also performed. Analysis and comparison of TTSS2 samples with endobenthic, hyperbenthic and planktonic samples collected by means of conventional sampling gears indicate the presence of a well-defined and distinct fauna in the plume of resuspended sediment behind the groundrope.}, keywords = {}, pubstate = {published}, tppubtype = {article} } A towed trawl simulator sledge (TTSS2) for collecting quantitatively small macrobenthic animals disturbed by the passage of otter trawl groundrope typical of the local fishery is described and illustrated. The TTSS2 was towed from a surface vessel at a speed within the range of commercial trawls, incorporating three sampling nets that open and close by means of an electro-mechanical system. An odometer in contact with the seabed provided a continuous record of the trawled ground. The degree of efficiency of the TTSS2 - by means of the attached groundrope that stirs up the surface of the bottom ahead of the nets -was tested in the northern continental shelf of Crete (eastern Mediterranean). Additional trials with a much heavier groundropc were also performed. Analysis and comparison of TTSS2 samples with endobenthic, hyperbenthic and planktonic samples collected by means of conventional sampling gears indicate the presence of a well-defined and distinct fauna in the plume of resuspended sediment behind the groundrope. |
2002 |
Arvanitidis, C; Bellan, G; Drakopoulos, P; Valavanis, V; Dounas, C; Koukouras, A; Eleftheriou, A Seascape biodiversity patterns along the Mediterranean and the Black Sea: Lessons from the biogeography of benthic polychaetes Journal Article Marine Ecology Progress Series, 244 , pp. 139–152, 2002, ISSN: 01718630, (Publisher: Inter-Research). @article{arvanitidis_seascape_2002, title = {Seascape biodiversity patterns along the Mediterranean and the Black Sea: Lessons from the biogeography of benthic polychaetes}, author = {C Arvanitidis and G Bellan and P Drakopoulos and V Valavanis and C Dounas and A Koukouras and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037196059&doi=10.3354%2fmeps244139&partnerID=40&md5=24de7c68fd8f96fef3454bcff8471663}, doi = {10.3354/meps244139}, issn = {01718630}, year = {2002}, date = {2002-01-01}, journal = {Marine Ecology Progress Series}, volume = {244}, pages = {139--152}, abstract = {The purpose of this paper is to investigate seascape biodiversity patterns along the Mediterranean and the Black Sea through the study of the benthic polychaete biogeography of the region. A set of non-parametric multivariate analyses and recently developed diversity indices were performed on the benthic polychaete inventories of the areas of the Mediterranean and the Black Sea. Both the numbers of species and the multivariate analyses demonstrate a west-east zoogeocline, shown by the decreasing number of species and by the multivariate similarity pattern of the areas. The performance of the 'second-stage' multi-dimensional scaling (MDS) shows, when species information is aggregated to genera, results belonging practically to the same similarity pattern, independent of the similarity coefficients utilized. The same similarity pattern is derived when species information is aggregated to the zoogeographical categories of amphi-Atlantic, Atlanto-Mediterranean, cosmopolitan and endemic species. BIO-ENV analysis reveals a large number of geographic, climatic and trophic variables to be highly correlated with the similarity pattern derived from the various taxonomic/zoogeographical categories. The synergy, however, of the environmental variables is best reflected in the case of the endemic Mediterranean species. The latter category is considered as the critical zoogeographic category with respect to providing information on the evolutionary history of the taxon in the region. The application of the average taxonomic distinctness and the variation of taxonomic distinctness indices resulted in a diversity ranking of the areas, which appears to be independent of the number of species hosted in each area. However, this is not the case for the phylogenetic diversity (PD) index. Additionally, the former 2 indices indicate that the benthic polychaete species-pool, hosted in the Mediterranean and the Black Sea areas, may well serve as a useful basis for future comparisons in environmental assessment studies. Finally, results from the application of the area-diversity formula show that the equilibrium model can be applicable for the endemic benthic polychaetes of the region: the number of endemic species can be considered as a function of the degree of isolation of the area from the source region against the degree of within-area isolated habitats.}, note = {Publisher: Inter-Research}, keywords = {}, pubstate = {published}, tppubtype = {article} } The purpose of this paper is to investigate seascape biodiversity patterns along the Mediterranean and the Black Sea through the study of the benthic polychaete biogeography of the region. A set of non-parametric multivariate analyses and recently developed diversity indices were performed on the benthic polychaete inventories of the areas of the Mediterranean and the Black Sea. Both the numbers of species and the multivariate analyses demonstrate a west-east zoogeocline, shown by the decreasing number of species and by the multivariate similarity pattern of the areas. The performance of the 'second-stage' multi-dimensional scaling (MDS) shows, when species information is aggregated to genera, results belonging practically to the same similarity pattern, independent of the similarity coefficients utilized. The same similarity pattern is derived when species information is aggregated to the zoogeographical categories of amphi-Atlantic, Atlanto-Mediterranean, cosmopolitan and endemic species. BIO-ENV analysis reveals a large number of geographic, climatic and trophic variables to be highly correlated with the similarity pattern derived from the various taxonomic/zoogeographical categories. The synergy, however, of the environmental variables is best reflected in the case of the endemic Mediterranean species. The latter category is considered as the critical zoogeographic category with respect to providing information on the evolutionary history of the taxon in the region. The application of the average taxonomic distinctness and the variation of taxonomic distinctness indices resulted in a diversity ranking of the areas, which appears to be independent of the number of species hosted in each area. However, this is not the case for the phylogenetic diversity (PD) index. Additionally, the former 2 indices indicate that the benthic polychaete species-pool, hosted in the Mediterranean and the Black Sea areas, may well serve as a useful basis for future comparisons in environmental assessment studies. Finally, results from the application of the area-diversity formula show that the equilibrium model can be applicable for the endemic benthic polychaetes of the region: the number of endemic species can be considered as a function of the degree of isolation of the area from the source region against the degree of within-area isolated habitats. |
Petihakis, G; Triantafyllou, G; Allen, I J; Hoteit, I; Dounas, C Modelling the spatial and temporal variability of the Cretan Sea ecosystem Journal Article Journal of Marine Systems, 36 (3-4), pp. 173–196, 2002, ISSN: 09247963. @article{petihakis_modelling_2002, title = {Modelling the spatial and temporal variability of the Cretan Sea ecosystem}, author = {G Petihakis and G Triantafyllou and I J Allen and I Hoteit and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036775648&doi=10.1016%2fS0924-7963%2802%2900186-0&partnerID=40&md5=f1e748d334e8ea4c11407d5a087e6585}, doi = {10.1016/S0924-7963(02)00186-0}, issn = {09247963}, year = {2002}, date = {2002-01-01}, journal = {Journal of Marine Systems}, volume = {36}, number = {3-4}, pages = {173--196}, abstract = {The ecosystem function of the oligotrophic Cretan Sea is explored through the development and application of a 3D ecological model. The simulation system comprises of two on-line coupled submodels: the 3D Princeton Ocean Model (POM) and the 1D European Regional Seas Ecosystem Model (ERSEM) adapted to the Cretan Sea. For the tuning and initialisation of the ecosystem parameters, the 1D version of the biogeochemical model is used. After a model spin up period of 10 years to reach a quasi-steady state, the results from an annual simulation are presented. A cost function is used as validation method for the comparison of model results with field data. The estimated annual primary and bacteria production are found to be in the range of the reported values. Simulation results are in good agreement with in situ data illustrating the role of the physical processes in determining the evolution and variability of the ecosystem. © 2002 Elsevier Science B.V. All rights reserved.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The ecosystem function of the oligotrophic Cretan Sea is explored through the development and application of a 3D ecological model. The simulation system comprises of two on-line coupled submodels: the 3D Princeton Ocean Model (POM) and the 1D European Regional Seas Ecosystem Model (ERSEM) adapted to the Cretan Sea. For the tuning and initialisation of the ecosystem parameters, the 1D version of the biogeochemical model is used. After a model spin up period of 10 years to reach a quasi-steady state, the results from an annual simulation are presented. A cost function is used as validation method for the comparison of model results with field data. The estimated annual primary and bacteria production are found to be in the range of the reported values. Simulation results are in good agreement with in situ data illustrating the role of the physical processes in determining the evolution and variability of the ecosystem. © 2002 Elsevier Science B.V. All rights reserved. |
2001 |
Antoniadou, Chryssanthi; Manoudis, G; Dounas, C; Kallianiotis, Argyris; Vidoris, P; Chintiroglou, Chariton Charles The colonization of experimental artificial reefs, from the serpulids polychaetes, in the N. Aegean Sea (Greece). preliminary results Inproceedings Rapp. Comm. Int. Mer Médit., pp. 352, Monaco, 2001. @inproceedings{antoniadou_colonization_2001, title = {The colonization of experimental artificial reefs, from the serpulids polychaetes, in the N. Aegean Sea (Greece). preliminary results}, author = {Chryssanthi Antoniadou and G Manoudis and C Dounas and Argyris Kallianiotis and P Vidoris and Chariton Charles Chintiroglou}, year = {2001}, date = {2001-01-01}, booktitle = {Rapp. Comm. Int. Mer Médit.}, volume = {36}, pages = {352}, address = {Monaco}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Pollani, A; Triantafyllou, G; Petihakis, George; Nittis, K; Dounas, C; Koutitas, C The Poseidon operational tool for the prediction of floating pollutant transport Journal Article Marine Pollution Bulletin, 43 , pp. 270–278, 2001. @article{pollani_poseidon_2001, title = {The Poseidon operational tool for the prediction of floating pollutant transport}, author = {A Pollani and G Triantafyllou and George Petihakis and K Nittis and C Dounas and C Koutitas}, year = {2001}, date = {2001-01-01}, journal = {Marine Pollution Bulletin}, volume = {43}, pages = {270--278}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Triantafyllou, G; Petihakis, George; Dounas, C; Theodorou, A Assessing marine ecosystem response to nutrient inputs Journal Article Marine Pollution Bulletin, 43 , pp. 175–186, 2001. @article{triantafyllou_assessing_2001, title = {Assessing marine ecosystem response to nutrient inputs}, author = {G Triantafyllou and George Petihakis and C Dounas and A Theodorou}, year = {2001}, date = {2001-01-01}, journal = {Marine Pollution Bulletin}, volume = {43}, pages = {175--186}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
2000 |
Koutsoubas, D; Arvanitidis, C; Dounas, C; Drummond, L Community structure and dynamics of the Molluscan Fauna in a Mediterranean lagoon (Gialova lagoon, SW Greece) Journal Article Belgian Journal of Zoology, 130 (SUPPL. 1), pp. 131–138, 2000, ISSN: 07776276. @article{koutsoubas_community_2000, title = {Community structure and dynamics of the Molluscan Fauna in a Mediterranean lagoon (Gialova lagoon, SW Greece)}, author = {D Koutsoubas and C Arvanitidis and C Dounas and L Drummond}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-78649411533&partnerID=40&md5=0db45fbd7fa9f9b765b6564d3c978855}, issn = {07776276}, year = {2000}, date = {2000-01-01}, journal = {Belgian Journal of Zoology}, volume = {130}, number = {SUPPL. 1}, pages = {131--138}, abstract = {The molluscan community of a shallow Mediterranean lagoon (Gialova lagoon, SW Greece, Ionian Sea) was studied on a seasonal basis during 1995-1996. A total of 23 species were recorded from the lagoon. Two of them namely: Placida viridis and Polycerella emertoni are reported for the first time from the Greek seas and the Eastern Mediterranean respectively. The dominant species were the gastropods Bittium reticulatum, Cerithium vulgatum, Pirenella conica, Hydrobia acuta, Cyclope neritea and the bivalves Cerastoderma glaucum, Abra ovata. Uni- and multivariate methods were employed to study the community structure and dynamics. On the basis of the multivariate pattern of the molluscan community a coenocline is observed which is strongly related with the degree of isolation. Two main zones with different faunal composition can be distinguished: one narrow zone close to the channel of communication with the sea and another in the innermost part of the lagoon. Following the confinement scale suggested for lagoonal ecosystems by GUELORGET & PERTHUISOT (1992) the first zone can be assigned to the "zone III" and the second to "zones IVV". The distribution pattern of the molluscan community is governed by a different set of environmental variables in each season, discussed in detail. Although no disturbance due to anthropogenic impact was revealed, this narrow lagoonal habitat was proved to suffer severe "dystrophic episodes", during late summer and the beginning of autumn, but successfully recovered, demonstrating a seasonal community pattern.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The molluscan community of a shallow Mediterranean lagoon (Gialova lagoon, SW Greece, Ionian Sea) was studied on a seasonal basis during 1995-1996. A total of 23 species were recorded from the lagoon. Two of them namely: Placida viridis and Polycerella emertoni are reported for the first time from the Greek seas and the Eastern Mediterranean respectively. The dominant species were the gastropods Bittium reticulatum, Cerithium vulgatum, Pirenella conica, Hydrobia acuta, Cyclope neritea and the bivalves Cerastoderma glaucum, Abra ovata. Uni- and multivariate methods were employed to study the community structure and dynamics. On the basis of the multivariate pattern of the molluscan community a coenocline is observed which is strongly related with the degree of isolation. Two main zones with different faunal composition can be distinguished: one narrow zone close to the channel of communication with the sea and another in the innermost part of the lagoon. Following the confinement scale suggested for lagoonal ecosystems by GUELORGET & PERTHUISOT (1992) the first zone can be assigned to the "zone III" and the second to "zones IVV". The distribution pattern of the molluscan community is governed by a different set of environmental variables in each season, discussed in detail. Although no disturbance due to anthropogenic impact was revealed, this narrow lagoonal habitat was proved to suffer severe "dystrophic episodes", during late summer and the beginning of autumn, but successfully recovered, demonstrating a seasonal community pattern. |
Koutsoubas, D; Dounas, C; Arvanitidis, C; Kornilios, S; Petihakis, G; Triantafyllou, G; Eleftheriou, A Macrobenthic community structure and disturbance assessment in Gialova Lagoon, Ionian Sea Journal Article ICES Journal of Marine Science, 57 (5), pp. 1472–1480, 2000, ISSN: 10543139, (Publisher: Academic Press). @article{koutsoubas_macrobenthic_2000, title = {Macrobenthic community structure and disturbance assessment in Gialova Lagoon, Ionian Sea}, author = {D Koutsoubas and C Dounas and C Arvanitidis and S Kornilios and G Petihakis and G Triantafyllou and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034493473&doi=10.1006%2fjmsc.2000.0905&partnerID=40&md5=ab96a84ab0a1dbac9ddf62aba60edc11}, doi = {10.1006/jmsc.2000.0905}, issn = {10543139}, year = {2000}, date = {2000-01-01}, journal = {ICES Journal of Marine Science}, volume = {57}, number = {5}, pages = {1472--1480}, abstract = {Gialova Lagoon, a coastal marine ecosystem in the Ionian Sea, suffered the impact of an oil spill incident in October 1993, leading to the extensive fish deaths when the oil tanker "Iliad" hit bottom in the entrance of the neighbouring Navarino Bay. A multidisciplinary study investigating the structure and functioning of Gialova Lagoon for the development of an integrated economic, social, and environmental management policy consistent with its conservation was carried out on a seasonal basis during 1995/1996. One of the research priorities was to investigate the structure and dynamics of the macrozoobenthic communities and assess whether these communities had recovered from the impact of the oil spill. The various methods applied (abundance/biomass comparison, distribution of species in geometric abundance and geometric size classes) revealed no detectable disturbance of the macrobenthic communities due to anthropogenic impact. However, it was proved that the lagoonal macrofauna suffered extreme natural disturbance due to a dystrophic crisis that occurred during autumn although they successfully recovered in subsequent seasons. Different sets of environmental factors were found to be highly correlated with the temporal and spatial distribution pattern of the macrobenthic communities and are discussed in detail. The coenocline observed in Gialova Lagoon appears to be strongly correlated with the degree of water exchange with adjacent marine and continental environments. © 2000 International Council for the Exploration of the Sea.}, note = {Publisher: Academic Press}, keywords = {}, pubstate = {published}, tppubtype = {article} } Gialova Lagoon, a coastal marine ecosystem in the Ionian Sea, suffered the impact of an oil spill incident in October 1993, leading to the extensive fish deaths when the oil tanker "Iliad" hit bottom in the entrance of the neighbouring Navarino Bay. A multidisciplinary study investigating the structure and functioning of Gialova Lagoon for the development of an integrated economic, social, and environmental management policy consistent with its conservation was carried out on a seasonal basis during 1995/1996. One of the research priorities was to investigate the structure and dynamics of the macrozoobenthic communities and assess whether these communities had recovered from the impact of the oil spill. The various methods applied (abundance/biomass comparison, distribution of species in geometric abundance and geometric size classes) revealed no detectable disturbance of the macrobenthic communities due to anthropogenic impact. However, it was proved that the lagoonal macrofauna suffered extreme natural disturbance due to a dystrophic crisis that occurred during autumn although they successfully recovered in subsequent seasons. Different sets of environmental factors were found to be highly correlated with the temporal and spatial distribution pattern of the macrobenthic communities and are discussed in detail. The coenocline observed in Gialova Lagoon appears to be strongly correlated with the degree of water exchange with adjacent marine and continental environments. © 2000 International Council for the Exploration of the Sea. |
Triantafyllou, G; Petihakis, G; Dounas, C; Koutsoubas, D; Arvanitidis, C; Eleftheriou, A Temporal variations in benthic communities and their response to physicochemical forcing: A numerical approach Journal Article ICES Journal of Marine Science, 57 (5), pp. 1507–1516, 2000, ISSN: 10543139, (Publisher: Academic Press). @article{triantafyllou_temporal_2000, title = {Temporal variations in benthic communities and their response to physicochemical forcing: A numerical approach}, author = {G Triantafyllou and G Petihakis and C Dounas and D Koutsoubas and C Arvanitidis and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034492083&doi=10.1006%2fjmsc.2000.0923&partnerID=40&md5=37dbe9cbf95e8c4e2e62b7f6e7c163d2}, doi = {10.1006/jmsc.2000.0923}, issn = {10543139}, year = {2000}, date = {2000-01-01}, journal = {ICES Journal of Marine Science}, volume = {57}, number = {5}, pages = {1507--1516}, abstract = {A generic complex ecological model, the European Regional Seas Ecosystem Model (ERSEM), was applied to a shallow lagoon system in the Eastern Mediterranean. Model results depicting the seasonal variation of nutrients and Chl-α in the water column, as well as three benthic functional groups (suspended feeders, deposit feeders, and benthic carnivores), are validated with in situ data. The likely effect of a technical intervention (river input) increasing the freshwater nutrient inputs on ecosystem functioning is also investigated. Detailed annual carbon fluxes and benthic fauna biomasses are calculated, before and after the river input. The importance of external physical/chemical forcing on the pelagic system and its subsequent effect on the benthic system are demonstrated. Model experiments indicate the shift of the ecosystem from nitrate limitation to predator control with external inputs. Model experiments also show a significant increase in the amount of carbon entering the benthic system through the activity of filter feeders when river inputs are implemented. © 2000 International Council for the Exploration of the Sea.}, note = {Publisher: Academic Press}, keywords = {}, pubstate = {published}, tppubtype = {article} } A generic complex ecological model, the European Regional Seas Ecosystem Model (ERSEM), was applied to a shallow lagoon system in the Eastern Mediterranean. Model results depicting the seasonal variation of nutrients and Chl-α in the water column, as well as three benthic functional groups (suspended feeders, deposit feeders, and benthic carnivores), are validated with in situ data. The likely effect of a technical intervention (river input) increasing the freshwater nutrient inputs on ecosystem functioning is also investigated. Detailed annual carbon fluxes and benthic fauna biomasses are calculated, before and after the river input. The importance of external physical/chemical forcing on the pelagic system and its subsequent effect on the benthic system are demonstrated. Model experiments indicate the shift of the ecosystem from nitrate limitation to predator control with external inputs. Model experiments also show a significant increase in the amount of carbon entering the benthic system through the activity of filter feeders when river inputs are implemented. © 2000 International Council for the Exploration of the Sea. |
McArthur, V E; Koutsoubas, D; Lampadariou, N; Dounas, C The meiofaunal community structure of a Mediterranean lagoon (Gialova lagoon, Ionian Sea) Journal Article Helgoland Marine Research, 54 (1), pp. 7–17, 2000, ISSN: 1438387X, (Publisher: Springer Verlag). @article{mcarthur_meiofaunal_2000, title = {The meiofaunal community structure of a Mediterranean lagoon (Gialova lagoon, Ionian Sea)}, author = {V E McArthur and D Koutsoubas and N Lampadariou and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034125190&doi=10.1007%2fs101520050031&partnerID=40&md5=a39dd162e646b360cd77d24fb663534d}, doi = {10.1007/s101520050031}, issn = {1438387X}, year = {2000}, date = {2000-01-01}, journal = {Helgoland Marine Research}, volume = {54}, number = {1}, pages = {7--17}, abstract = {The higher taxonomic structure of a meiofaunal community was investigated in an Eastern Mediterranean lagoon (Gialova lagoon, Ionian Sea). Seven stations were sampled on a seasonal basis during 1995-1996. Stations within the lagoon were found to support a maximum of 14 meiofaunal taxa with densities ranging from 17 to over 2000 individuals per 10 cm2. Nematodes were not always the most abundant taxa, although they dominated about half of the total 28 samples. Uni- and multivariate analyses were employed to study the community structure. The distribution pattern of the meiofaunal community varied both across the lagoon and over the seasons. On the basis of the spatial differences a meiofaunal coenocline, correlated with the degree of isolation, was observed, composed of mainly two zones: one defined by the area close to the marine channel and the other the more isolated area in the inner lagoon. Meiofaunal distribution pattern was not clearly correlated to one environmental variable, but rather to many, and spatial and seasonal effects could be seen.}, note = {Publisher: Springer Verlag}, keywords = {}, pubstate = {published}, tppubtype = {article} } The higher taxonomic structure of a meiofaunal community was investigated in an Eastern Mediterranean lagoon (Gialova lagoon, Ionian Sea). Seven stations were sampled on a seasonal basis during 1995-1996. Stations within the lagoon were found to support a maximum of 14 meiofaunal taxa with densities ranging from 17 to over 2000 individuals per 10 cm2. Nematodes were not always the most abundant taxa, although they dominated about half of the total 28 samples. Uni- and multivariate analyses were employed to study the community structure. The distribution pattern of the meiofaunal community varied both across the lagoon and over the seasons. On the basis of the spatial differences a meiofaunal coenocline, correlated with the degree of isolation, was observed, composed of mainly two zones: one defined by the area close to the marine channel and the other the more isolated area in the inner lagoon. Meiofaunal distribution pattern was not clearly correlated to one environmental variable, but rather to many, and spatial and seasonal effects could be seen. |
Koukouras, A; Dounas, C Decapod crustaceans new to the fauna of the Aegean sea Journal Article Crustaceana, 73 (4), pp. 497–502, 2000, ISSN: 0011216X. @article{koukouras_decapod_2000, title = {Decapod crustaceans new to the fauna of the Aegean sea}, author = {A Koukouras and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034487839&doi=10.1163%2f156854000504462&partnerID=40&md5=1bf21e323555907fd4a71a1a95c1fcb8}, doi = {10.1163/156854000504462}, issn = {0011216X}, year = {2000}, date = {2000-01-01}, journal = {Crustaceana}, volume = {73}, number = {4}, pages = {497--502}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Dounas, C; Arvanitidis, C; Koulouri, P Artificial reefs as a management tool for the delineation, protection and enhancement of coastal ecosystems Journal Article Fishing News, 228 , pp. 94–96 (In Greek), 2000. @article{dounas_artificial_2000, title = {Artificial reefs as a management tool for the delineation, protection and enhancement of coastal ecosystems}, author = {C Dounas and C Arvanitidis and P Koulouri}, year = {2000}, date = {2000-01-01}, journal = {Fishing News}, volume = {228}, pages = {94--96 (In Greek)}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
1999 |
Petihakis, G; Triantafyllou, G; Koutsoubas, D; Allen, I; Dounas, C Modelling the annual cycles of nutrients and phytoplankton in a Mediterranean lagoon (Gialova, Greece) Journal Article Marine Environmental Research, 48 (1), pp. 37–58, 1999, ISSN: 01411136. @article{petihakis_modelling_1999, title = {Modelling the annual cycles of nutrients and phytoplankton in a Mediterranean lagoon (Gialova, Greece)}, author = {G Petihakis and G Triantafyllou and D Koutsoubas and I Allen and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032962205&doi=10.1016%2fS0141-1136%2899%2900031-8&partnerID=40&md5=8fed2e52e84b89476fe2f603648f92d2}, doi = {10.1016/S0141-1136(99)00031-8}, issn = {01411136}, year = {1999}, date = {1999-01-01}, journal = {Marine Environmental Research}, volume = {48}, number = {1}, pages = {37--58}, abstract = {Nutrient dynamics for phosphate, nitrate, ammonium and silicate have been simulated with the European Regional Seas Ecosystem Model in a Mediterranean lagoon. This generic model designed for the open sea can be usefully applied also to coastal lagoon ecosystems with minimum modifications. The annual cycles of the nutrients phosphate and silicate compare guile well with the observed ranges of variability. This does not hold for ammonium and nitrate where the increased concentrations could be attributed to external inputs from the land. Nutrient budgets calculated from the model results indicate some competition between phytoplankton and bacteria for nutrients, a common characteristic of lagoons. To further develop the model, an adaptation of the phytoplankton submodel to represent benthic primary production, as well as the modification of the benthic nutrient model to cope with anoxic events are suggested.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Nutrient dynamics for phosphate, nitrate, ammonium and silicate have been simulated with the European Regional Seas Ecosystem Model in a Mediterranean lagoon. This generic model designed for the open sea can be usefully applied also to coastal lagoon ecosystems with minimum modifications. The annual cycles of the nutrients phosphate and silicate compare guile well with the observed ranges of variability. This does not hold for ammonium and nitrate where the increased concentrations could be attributed to external inputs from the land. Nutrient budgets calculated from the model results indicate some competition between phytoplankton and bacteria for nutrients, a common characteristic of lagoons. To further develop the model, an adaptation of the phytoplankton submodel to represent benthic primary production, as well as the modification of the benthic nutrient model to cope with anoxic events are suggested. |
Arvanitidis, C; Koutsoubas, D; Dounas, C; Eleftheriou, A Annelid fauna of a Mediterranean lagoon (Gialova Lagoon, south-west Greece): Community structure in a severely fluctuating environment Journal Article Journal of the Marine Biological Association of the United Kingdom, 79 (5), pp. 849–856, 1999, ISSN: 00253154. @article{arvanitidis_annelid_1999, title = {Annelid fauna of a Mediterranean lagoon (Gialova Lagoon, south-west Greece): Community structure in a severely fluctuating environment}, author = {C Arvanitidis and D Koutsoubas and C Dounas and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032745818&doi=10.1017%2fS0025315499001010&partnerID=40&md5=b5ac264673a03e1f15a7a88f2be04fd2}, doi = {10.1017/S0025315499001010}, issn = {00253154}, year = {1999}, date = {1999-01-01}, journal = {Journal of the Marine Biological Association of the United Kingdom}, volume = {79}, number = {5}, pages = {849--856}, abstract = {The annelid community of a shallow Mediterranean lagoon (Gialova Lagoon, Ionian Sea) was studied on a seasonal basis. Out of the 39 species identified eight are reported for the first time from the central Mediterranean. The dominant species were the polychaetes Capitella capitata, Neodexiospira pseudocorrugata, Malacoceros fuliginosus, Perinereis cultrifera, Hediste diversicolor, Heteromastus filiformis and the oligochaete Limnodriloides maslinicensis. Uni- and multivariate methods were employed to study the community structure. The coenocline observed is strongly related to the degree of isolation; its main features (i.e. number of species, density, geometric abundance and size-classes) in space and time are presented and discussed in detail. The distribution pattern of the annelid community has been found to be governed by a different set of environmental factors in each season. Although this narrow lagoonal habitat suffers severe dystrophic episodes it manages to recover, demonstrating a seasonal community pattern.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The annelid community of a shallow Mediterranean lagoon (Gialova Lagoon, Ionian Sea) was studied on a seasonal basis. Out of the 39 species identified eight are reported for the first time from the central Mediterranean. The dominant species were the polychaetes Capitella capitata, Neodexiospira pseudocorrugata, Malacoceros fuliginosus, Perinereis cultrifera, Hediste diversicolor, Heteromastus filiformis and the oligochaete Limnodriloides maslinicensis. Uni- and multivariate methods were employed to study the community structure. The coenocline observed is strongly related to the degree of isolation; its main features (i.e. number of species, density, geometric abundance and size-classes) in space and time are presented and discussed in detail. The distribution pattern of the annelid community has been found to be governed by a different set of environmental factors in each season. Although this narrow lagoonal habitat suffers severe dystrophic episodes it manages to recover, demonstrating a seasonal community pattern. |
1998 |
Koukouras, A; Kühlmann, D; Voultsiadou, E; Vafidis, D; Dounas, C; Chintiroglou, C; Koutsoubas, D The macrofaunal assemblage associated with the scleractinian coral Cladocora caespitosa (L.) in the Aegean Sea Journal Article Annales de l'Institute Oceanographique, 74 (2), pp. 97–114, 1998, ISSN: 00789682. @article{koukouras_macrofaunal_1998, title = {The macrofaunal assemblage associated with the scleractinian coral Cladocora caespitosa (L.) in the Aegean Sea}, author = {A Koukouras and D Kühlmann and E Voultsiadou and D Vafidis and C Dounas and C Chintiroglou and D Koutsoubas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032226464&partnerID=40&md5=a085efb4c6388beeabc74c3201106b21}, issn = {00789682}, year = {1998}, date = {1998-01-01}, journal = {Annales de l'Institute Oceanographique}, volume = {74}, number = {2}, pages = {97--114}, abstract = {Colonies of the Scleractinian C. caespitosa were collected from two different sites in the Chalkidiki Peninsula (North Aegean Sea. Greece) in September 1987. The information obtained from multidimensional scaling and analysis of the data revealed a difference in the qualitative and quantitative composition of the associated assemblage between the two sites. Two distinguishable benthic communities exist, due to the different prevailing physicochemical parameters. At the shallow site, crustaceans and molluscs are the dominant taxa, in contrast to polychaetes at the deepest site. At both sites, deposit feeders dominate, with their numbers increasing with depth. In contrast, numbers of suspension feeders decrease with depth.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Colonies of the Scleractinian C. caespitosa were collected from two different sites in the Chalkidiki Peninsula (North Aegean Sea. Greece) in September 1987. The information obtained from multidimensional scaling and analysis of the data revealed a difference in the qualitative and quantitative composition of the associated assemblage between the two sites. Two distinguishable benthic communities exist, due to the different prevailing physicochemical parameters. At the shallow site, crustaceans and molluscs are the dominant taxa, in contrast to polychaetes at the deepest site. At both sites, deposit feeders dominate, with their numbers increasing with depth. In contrast, numbers of suspension feeders decrease with depth. |
Kornilios, S; Drakopoulos, P G; Dounas, C Pelagic tar, dissolved/dispersed petroleum hydrocarbons and plastic distribution in the Cretan Sea, Greece Journal Article Marine Pollution Bulletin, 36 (12), pp. 989–993, 1998, ISSN: 0025326X. @article{kornilios_pelagic_1998, title = {Pelagic tar, dissolved/dispersed petroleum hydrocarbons and plastic distribution in the Cretan Sea, Greece}, author = {S Kornilios and P G Drakopoulos and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032425472&doi=10.1016%2fS0025-326X%2898%2900102-7&partnerID=40&md5=5c9338c5690910be6dbc8ceebf588557}, doi = {10.1016/S0025-326X(98)00102-7}, issn = {0025326X}, year = {1998}, date = {1998-01-01}, journal = {Marine Pollution Bulletin}, volume = {36}, number = {12}, pages = {989--993}, abstract = {During the first cruise of R/V 'Philia' in July 1997 within the framework of the TALOS programme supported by the creek Ministry of Physical Planning and Public Works, the sampling of floating tar, litter and sea water for dissolved/dispersed petroleum hydrocarbons (DDPH) was carried out in the Cretan Sea. Analysis of these data has allowed a first assessment of the status of floating marine pollution in the region. DDPH measurements showed a mean concentration of 0.145 μg/l of chrysene equivalents (n = 24). Tar and plastics concentrations were in the range of 1 - 4280 and 0 - 1160 μg/m2, respectively. Mean pelagic tar concentration was 318 μg/m2, more than two times higher than what was reported for the area in previous studies. Based on in situ hydrographic observations there is strong evidence that most of the floating tar enters the Cretan Sea through the Ionian Sea.}, keywords = {}, pubstate = {published}, tppubtype = {article} } During the first cruise of R/V 'Philia' in July 1997 within the framework of the TALOS programme supported by the creek Ministry of Physical Planning and Public Works, the sampling of floating tar, litter and sea water for dissolved/dispersed petroleum hydrocarbons (DDPH) was carried out in the Cretan Sea. Analysis of these data has allowed a first assessment of the status of floating marine pollution in the region. DDPH measurements showed a mean concentration of 0.145 μg/l of chrysene equivalents (n = 24). Tar and plastics concentrations were in the range of 1 - 4280 and 0 - 1160 μg/m2, respectively. Mean pelagic tar concentration was 318 μg/m2, more than two times higher than what was reported for the area in previous studies. Based on in situ hydrographic observations there is strong evidence that most of the floating tar enters the Cretan Sea through the Ionian Sea. |
Drakopoulos, PG; Kornilios, S; Kristallas, A; Dounas, C Distribution of floating tar in the Cretan Sea, Eastern Mediterranean, and its relation to the surface circulation Inproceedings Technical University of Crete, Chania Greece, 1998, (Publication Title: 7th International Conference on Natural & Man - Made Hazards). @inproceedings{drakopoulos_distribution_1998, title = {Distribution of floating tar in the Cretan Sea, Eastern Mediterranean, and its relation to the surface circulation}, author = {PG Drakopoulos and S Kornilios and A Kristallas and C Dounas}, year = {1998}, date = {1998-01-01}, address = {Technical University of Crete, Chania Greece}, note = {Publication Title: 7th International Conference on Natural & Man - Made Hazards}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Dounas, C; Koutsoubas, D; Arvanitidis, C; Petihakis, G; Drummond, L; A, Eleftheriou Biodiversity and the impact of anthropogenic activities in Mediterranean lagoons: The case of Gialova lagoon, SW Greece Journal Article Oebalia, 24 , pp. 77–91, 1998. @article{dounas_biodiversity_1998, title = {Biodiversity and the impact of anthropogenic activities in Mediterranean lagoons: The case of Gialova lagoon, SW Greece}, author = {C Dounas and D Koutsoubas and C Arvanitidis and G Petihakis and L Drummond and Eleftheriou A}, year = {1998}, date = {1998-01-01}, journal = {Oebalia}, volume = {24}, pages = {77--91}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
1997 |
Dounas, C; Kallianiotis, Argyris Construction of an artificial reef park and creation of a marine protected zone in order to prevent fishing activities off the coasts of Thrace (N. Aegean Sea) Journal Article Fishing News, 197 , pp. 50–55, 1997, ((in Greek)). @article{dounas_construction_1997, title = {Construction of an artificial reef park and creation of a marine protected zone in order to prevent fishing activities off the coasts of Thrace (N. Aegean Sea)}, author = {C Dounas and Argyris Kallianiotis}, year = {1997}, date = {1997-01-01}, journal = {Fishing News}, volume = {197}, pages = {50--55}, note = {(in Greek)}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Koutsoubas, D; Dounas, C; Petihakis, G; Arvanitidis, C; Triantafyllou, G; Dafnomili, E; Zivanovic, S Dynamics of the physicochemical parameters in water column and in the sediments of the Gialova lagoon (NW Peloponnese, Ionian Sea) Inproceedings pp. 351–353, Kavala, Greece, 1997, (Publication Title: Seventh Symposium on Oceanography and Fisheries, Κavala). @inproceedings{koutsoubas_dynamics_1997, title = {Dynamics of the physicochemical parameters in water column and in the sediments of the Gialova lagoon (NW Peloponnese, Ionian Sea)}, author = {D Koutsoubas and C Dounas and G Petihakis and C Arvanitidis and G Triantafyllou and E Dafnomili and S Zivanovic}, year = {1997}, date = {1997-01-01}, volume = {II}, pages = {351--353}, address = {Kavala, Greece}, note = {Publication Title: Seventh Symposium on Oceanography and Fisheries, Κavala}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Koutsoubas, D; Arvanitidis, C; Petihakis, G; Drummond, L; Dounas, C Structure and dynamics of the macrobenthic populations in Gialova lagoon (Ionian Sea) Inproceedings 1997, (Publication Title: Seventh Symposium on Oceanography and Fisheries, Κavala). @inproceedings{koutsoubas_structure_1997, title = {Structure and dynamics of the macrobenthic populations in Gialova lagoon (Ionian Sea)}, author = {D Koutsoubas and C Arvanitidis and G Petihakis and L Drummond and C Dounas}, year = {1997}, date = {1997-01-01}, volume = {II}, note = {Publication Title: Seventh Symposium on Oceanography and Fisheries, Κavala}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
1996 |
Dounas, C; Koutsoubas, Drosos; Arvanitidis, Christos; Petihakis, George; Drummond, A; Eleftheriou, A Βiodiversity in the Μediterranean lagoons: Τhe case of Gialova lagoon, SW Greece Inproceedings Frankfurt a.M., Germany, 1996, (Publication Title: Second Ιnternational Βiodiversity Conference, Frankfurt a.M., Germany). @inproceedings{dounas_iodiversity_1996, title = {Βiodiversity in the Μediterranean lagoons: Τhe case of Gialova lagoon, SW Greece}, author = {C Dounas and Drosos Koutsoubas and Christos Arvanitidis and George Petihakis and A Drummond and A Eleftheriou}, year = {1996}, date = {1996-01-01}, address = {Frankfurt a.M., Germany}, note = {Publication Title: Second Ιnternational Βiodiversity Conference, Frankfurt a.M., Germany}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
1994 |
Dounas, C; Steudel, C Stomatopod Crustacea from the Island of Crete Journal Article Crustaceana, 66 , pp. 252–254, 1994. @article{dounas_stomatopod_1994, title = {Stomatopod Crustacea from the Island of Crete}, author = {C Dounas and C Steudel}, year = {1994}, date = {1994-01-01}, journal = {Crustaceana}, volume = {66}, pages = {252--254}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Papadopoulou, K -N; Dounas, C; Smith, Chris J Distributional patterns and taxonomic notes on Lumbrineridae from Crete (S. Aegean, eastern Mediterranean) Journal Article Bulletin du Muséum National D’Histoire Naturelle, Paris, 162 , pp. 259–268, 1994. @article{papadopoulou_distributional_1994, title = {Distributional patterns and taxonomic notes on Lumbrineridae from Crete (S. Aegean, eastern Mediterranean)}, author = {K -N Papadopoulou and C Dounas and Chris J Smith}, year = {1994}, date = {1994-01-01}, journal = {Bulletin du Muséum National D’Histoire Naturelle, Paris}, volume = {162}, pages = {259--268}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Tsanis, I K; Shen, H; Dounas, C; Eleftheriou, A Application of POM and IDOR hydrodynamic models in the nearshore areas of North Crete Inproceedings International Conference on Hydraulic Engineering Software, Hydrosoft, Proceedings, pp. 91–98, Computational Mechanics Publ, Southampton, United Kingdom, 1994. @inproceedings{tsanis_application_1994, title = {Application of POM and IDOR hydrodynamic models in the nearshore areas of North Crete}, author = {I K Tsanis and H Shen and C Dounas and A Eleftheriou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0028749595&partnerID=40&md5=21a23aeb0e4bf9e58f033ff2bccef70d}, year = {1994}, date = {1994-01-01}, booktitle = {International Conference on Hydraulic Engineering Software, Hydrosoft, Proceedings}, volume = {2}, pages = {91--98}, publisher = {Computational Mechanics Publ, Southampton, United Kingdom}, abstract = {The two dimensional hydrodynamic components (external mode) of the Princeton oceanic model (POM) and the hydrodynamic model IDOR are applied to the nearshore areas of North Crete to describe the wind-induced depth-averaged currents and transports under different environmental conditions. Model runs were carried for different directions at different wind speeds. Simulation results indicate that POM does not perform as well as IDOR in cases of very steep bottom topography. The difference is attributed to the formulation of the governing equations in terms of velocity (POM) and water transport (IDOR).}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } The two dimensional hydrodynamic components (external mode) of the Princeton oceanic model (POM) and the hydrodynamic model IDOR are applied to the nearshore areas of North Crete to describe the wind-induced depth-averaged currents and transports under different environmental conditions. Model runs were carried for different directions at different wind speeds. Simulation results indicate that POM does not perform as well as IDOR in cases of very steep bottom topography. The difference is attributed to the formulation of the governing equations in terms of velocity (POM) and water transport (IDOR). |
1993 |
Koukouras, Athanasios; Dounas, C; Eleftheriou, A Crustacea Decapoda from the cruises of “Calypso” 1955, 1960, in the Greek waters Journal Article BIOS, 1 , pp. 193–200, 1993. @article{koukouras_crustacea_1993, title = {Crustacea Decapoda from the cruises of “Calypso” 1955, 1960, in the Greek waters}, author = {Athanasios Koukouras and C Dounas and A Eleftheriou}, year = {1993}, date = {1993-01-01}, journal = {BIOS}, volume = {1}, pages = {193--200}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
1992 |
Dounas, C G; Koukouras, A S Circalittoral Macrobenthic Assemblages of Strymonikos Gulf (North Aegean Sea) Journal Article Marine Ecology, 13 (2), pp. 85–99, 1992, ISSN: 01739565. @article{dounas_circalittoral_1992, title = {Circalittoral Macrobenthic Assemblages of Strymonikos Gulf (North Aegean Sea)}, author = {C G Dounas and A S Koukouras}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0027059590&doi=10.1111%2fj.1439-0485.1992.tb00342.x&partnerID=40&md5=42a8fce7cb96c59341d2d8a8cda8b0c8}, doi = {10.1111/j.1439-0485.1992.tb00342.x}, issn = {01739565}, year = {1992}, date = {1992-01-01}, journal = {Marine Ecology}, volume = {13}, number = {2}, pages = {85--99}, abstract = {Abstract. Six macrobenthic assemblages of the circalittoral zone found in Strymonikos Gulf, North Aegean Sea, are described and compared with the corresponding ones from other Mediterranean and Atlantic areas. For the delimination of these assemblages and the evaluation of the major environmental gradients governing their distribution, several numerical techniques were used. Copyright © 1992, Wiley Blackwell. All rights reserved}, keywords = {}, pubstate = {published}, tppubtype = {article} } Abstract. Six macrobenthic assemblages of the circalittoral zone found in Strymonikos Gulf, North Aegean Sea, are described and compared with the corresponding ones from other Mediterranean and Atlantic areas. For the delimination of these assemblages and the evaluation of the major environmental gradients governing their distribution, several numerical techniques were used. Copyright © 1992, Wiley Blackwell. All rights reserved |
Koukouras, A; Russo, A; Voultsiadou‐Koukoura, E; Dounas, C; Chintiroglou, C Relationship of Sponge Macrofauna with the Morphology of their Hosts in the North Aegean Sea Journal Article Internationale Revue der gesamten Hydrobiologie und Hydrographie, 77 (4), pp. 609–619, 1992, ISSN: 00209309. @article{koukouras_relationship_1992, title = {Relationship of Sponge Macrofauna with the Morphology of their Hosts in the North Aegean Sea}, author = {A Koukouras and A Russo and E Voultsiadou‐Koukoura and C Dounas and C Chintiroglou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987291018&doi=10.1002%2firoh.19920770406&partnerID=40&md5=b9872d60e12fabd14e7700ff497200f9}, doi = {10.1002/iroh.19920770406}, issn = {00209309}, year = {1992}, date = {1992-01-01}, journal = {Internationale Revue der gesamten Hydrobiologie und Hydrographie}, volume = {77}, number = {4}, pages = {609--619}, abstract = {The associated macrofauna of four Aegean Sea sponge species (Agelas oroides, Petrosia ficiformis, Ircinia variabilis and Aplysina aerophoba) was compared. The total number of individuals and species was found to be related to sponge volume for all sponge species. The associated macrofaunal weight per individual on all sponge species was negatively correlated with sponge volume. Sponge complexity, as measured by sponge surface area to biomass ratio, was not a consistent predictor of associated macrofauna abundance or diversity. Sponge macrofauna species were not host specific and their relative abundances differed among sponge species. Copyright © 1992 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim}, keywords = {}, pubstate = {published}, tppubtype = {article} } The associated macrofauna of four Aegean Sea sponge species (Agelas oroides, Petrosia ficiformis, Ircinia variabilis and Aplysina aerophoba) was compared. The total number of individuals and species was found to be related to sponge volume for all sponge species. The associated macrofaunal weight per individual on all sponge species was negatively correlated with sponge volume. Sponge complexity, as measured by sponge surface area to biomass ratio, was not a consistent predictor of associated macrofauna abundance or diversity. Sponge macrofauna species were not host specific and their relative abundances differed among sponge species. Copyright © 1992 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim |
Koukouras, Athanasios; Dounas, C; Turkay, M; Voultsiadou, Eleni Decapod crustacean fauna of the Aegean Sea: Νew information, check list, affinities Journal Article Senckebergiana Maritima, 22 , pp. 217–244, 1992. @article{koukouras_decapod_1992, title = {Decapod crustacean fauna of the Aegean Sea: Νew information, check list, affinities}, author = {Athanasios Koukouras and C Dounas and M Turkay and Eleni Voultsiadou}, year = {1992}, date = {1992-01-01}, journal = {Senckebergiana Maritima}, volume = {22}, pages = {217--244}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Koutsoubas, D; Koukouras, Athanasios; Karakassis, Ioannis; Dounas, C Contribution to the knowledge of Gastropoda and Bivalvia (Mollusca) of Crete Island (S. Aegean Sea) Journal Article Bolletino Malacologico, 28 , pp. 69–82, 1992. @article{koutsoubas_contribution_1992, title = {Contribution to the knowledge of Gastropoda and Bivalvia (Mollusca) of Crete Island (S. Aegean Sea)}, author = {D Koutsoubas and Athanasios Koukouras and Ioannis Karakassis and C Dounas}, year = {1992}, date = {1992-01-01}, journal = {Bolletino Malacologico}, volume = {28}, pages = {69--82}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
1989 |
Chintiroglou, H; Dounas, C; Koukouras, Ath. The Presence of Corallium rubrum (Linnaeus, 1758) in the Eastern Mediterranean Sea Journal Article Mitteilungen aus dem Museum für Naturkunde in Berlin. Zoologisches Museum und Institut für Spezielle Zoologie (Berlin), 65 (1), pp. 145–149, 1989, ISSN: 03738493. @article{chintiroglou_presence_1989, title = {The Presence of Corallium rubrum (Linnaeus, 1758) in the Eastern Mediterranean Sea}, author = {H Chintiroglou and C Dounas and Ath. Koukouras}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84986802623&doi=10.1002%2fmmnz.4830650106&partnerID=40&md5=a08b211d4519da246ee6336311190436}, doi = {10.1002/mmnz.4830650106}, issn = {03738493}, year = {1989}, date = {1989-01-01}, journal = {Mitteilungen aus dem Museum für Naturkunde in Berlin. Zoologisches Museum und Institut für Spezielle Zoologie (Berlin)}, volume = {65}, number = {1}, pages = {145--149}, abstract = {Numerous colonies of Corallium rubrum were found in 4 areas in the North Aegean Sea, proving the doubtfull presence of this species in the Eastern Mediterranean, up to date. Additional information is also given on its geographical distribution, the form and the size of its sclerites and its habitat. Copyright © 1989 Wiley‐VCH}, keywords = {}, pubstate = {published}, tppubtype = {article} } Numerous colonies of Corallium rubrum were found in 4 areas in the North Aegean Sea, proving the doubtfull presence of this species in the Eastern Mediterranean, up to date. Additional information is also given on its geographical distribution, the form and the size of its sclerites and its habitat. Copyright © 1989 Wiley‐VCH |
Dounas, C; Koukouras, Athanasios Odontozona minoica, new species, from the Εastern Mediterranean Sea (Decapoda, Stenopodidea) Journal Article Journal of Crustacean Biology, 9 , pp. 341–348, 1989. @article{dounas_odontozona_1989, title = {Odontozona minoica, new species, from the Εastern Mediterranean Sea (Decapoda, Stenopodidea)}, author = {C Dounas and Athanasios Koukouras}, year = {1989}, date = {1989-01-01}, journal = {Journal of Crustacean Biology}, volume = {9}, pages = {341--348}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Dounas, C; Koukouras, Athanasios Some observations on the possible synonymy of Eunice vittata (Delle Chiaje, 1825) and E. indica Kinberg, 1865 (Annelida, Polychaeta) Journal Article Cahiers de Biologie Marine, 30 , pp. 227–234, 1989. @article{dounas_observations_1989, title = {Some observations on the possible synonymy of Eunice vittata (Delle Chiaje, 1825) and E. indica Kinberg, 1865 (Annelida, Polychaeta)}, author = {C Dounas and Athanasios Koukouras}, year = {1989}, date = {1989-01-01}, journal = {Cahiers de Biologie Marine}, volume = {30}, pages = {227--234}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
1988 |
Dounas, C; Eleftheriou, A; Koukouras, Athanasios The presence of Corallium rubrum (Linnaeus, 1758) in Greek Waters. A historical Review Technical Report (413), 1988. @techreport{dounas_presence_1988, title = {The presence of Corallium rubrum (Linnaeus, 1758) in Greek Waters. A historical Review}, author = {C Dounas and A Eleftheriou and Athanasios Koukouras}, year = {1988}, date = {1988-01-01}, number = {413}, pages = {99--100}, keywords = {}, pubstate = {published}, tppubtype = {techreport} } |
1986 |
Dounas, C; Koukouras, A The Genus Cymodoce Leach (Isopoda, Flabellifera) In the North Aegean Sea Journal Article Crustaceana, 51 (3), pp. 306–308, 1986, ISSN: 0011216X. @article{dounas_genus_1986, title = {The Genus Cymodoce Leach (Isopoda, Flabellifera) In the North Aegean Sea}, author = {C Dounas and A Koukouras}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84966022714&doi=10.1163%2f156854086X00494&partnerID=40&md5=00b558fb6c58e02e9b47ccc5c44c1d3a}, doi = {10.1163/156854086X00494}, issn = {0011216X}, year = {1986}, date = {1986-01-01}, journal = {Crustaceana}, volume = {51}, number = {3}, pages = {306--308}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
1985 |
Koukouras, Athanasios; Voultsiadou-Koukoura, Eleni; Chintiroglou, Chariton Charles; Dounas, C Benthic bionomy of the North Aegean Sea. III. - A comparison of the macrobenthic animal assemblages associated with seven sponge species Journal Article Cahiers de Biologie Marine, 26 , pp. 301–319, 1985. @article{koukouras_benthic_1985, title = {Benthic bionomy of the North Aegean Sea. III. - A comparison of the macrobenthic animal assemblages associated with seven sponge species}, author = {Athanasios Koukouras and Eleni Voultsiadou-Koukoura and Chariton Charles Chintiroglou and C Dounas}, year = {1985}, date = {1985-01-01}, journal = {Cahiers de Biologie Marine}, volume = {26}, pages = {301--319}, keywords = {}, pubstate = {published}, tppubtype = {article} } |