A multidisciplinary approach to the understanding of hydromedusan populations inhabiting Mediterranean submarine canyons |
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| Institution: | 1. Institut de Ciències del Mar (CSIC), Plaça del Mar s/n 08039 Barcelona, Spain;2. Laboratoire de Biologie Marine, Facultés des Sciences, Université Libre de Bruxelles, Av. F.D. Roosevelt, 1050 Bruxelles, Belgium;3. Centre de Formation et de Recherche sur l''Environnement Marin, CNRS ERS 1745, Université de Perpignan 52, Avenue de Villeneuve, 66860 Perpignan CedexUniversité de Perpignan, France;4. Department Estratigrafia i Paleontologia, Facultat de Geologı́a, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain;1. Environmental Ph.D. Science, Jackson State University, 1400 J.R. Lynch Street, Jackson, MS 39217, USA;2. Department of Chemistry and Biochemistry, Jackson State University, 1400 J.R. Lynch Street, Jackson, MS 39217, USA;3. The U.S. Army Engineer Research and Development Center (ERDC), 3909 Halls Ferry Road, Vicksburg, MS 39180, USA;4. Genetics and Precision Agriculture Research Unit, USDA-ARS, P.O. 5367, Mississippi State, MS 39762, USA;1. Greenland Institute of Natural Resources, Copenhagen, Denmark;2. A.N. Severtsov Institute of Ecology and Evolution of Russian Academy of Sciences, Moscow, Russia;1. Institute of Animal Nutrition and Bromatology, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Sciences, Lublin, Poland;2. Sub-Department of Internal Diseases of Farm Animals and Horses, Faculty Veterinary Medicine, University of Life Sciences, Lublin, Poland;3. Department of Biological Bases of Food and Feed Technologies, University of Life Science, Lublin, Poland;4. State Scientific-Research Control Institute of Veterinary Medical Products and Feed Additives, Lviv, Ukraine;1. Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy;2. Cooperativa Allevatori Ovini Formaggi Soc. Coop. Agricola, Loc. “Perda Lada” Fenosu, 09170, Oristano, Italy;1. Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Marlowe Building, Canterbury, Kent CT2 7NR, UK;2. Caño Palma Biological Station, Canadian Organization for Tropical Education and Rainforest Conservation (COTERC), Pococí, Limón, Costa Rica;3. Centro de Rescate de Especies Marinas Amenazadas (CREMA), Guanacaste, Costa Rica;4. Paso Pacifico, PO Box 1244, Ventura, CA 93002-1244, USA;5. School for Environment and Sustainability, University of Michigan, Dana Building, 440 Church Street, Ann Arbor, MI 48109, USA |
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| Abstract: | Studies carried out in four submarine canyons in the northwestern Mediterranean Sea have resulted in the discovery of a new fauna composed chiefly of hydromedusae. This finding has led us to postulate the existence of a singular planktonic community in these canyons that is probably maintained by the flux and deposit of organic material from the continental shelf. The specific composition and abundance of the populations differ from canyon to canyon and seem to be related to vertical fluxes, topography, and both the hydrographic and ecological features of each canyon. This hydromedusan fauna is characterized by meroplanktonic species that appear to live out their entire life cycles inside the canyons. Those cycles seem to be linked to seasonal production processes related to factors such as canyon topography, sedimentation, and circulation of water masses within the canyons. The present study indicates that submarine canyons could be a new key habitat to an understanding of the biodiversity of coastal and shelf zones. The origin of the deep-water Mediterranean fauna is reviewed, and the hypothesis of a Tethys origin for some of the deep-water hydromedusae endemic to the Mediterranean is entertained. |
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