Spatial patterns in suprabenthic communities in the English Channel |
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| Authors: | Jean-Claude Dauvin Céline Rolet Sandrine Alizier Thierry Ruellet |
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| Institution: | 1. Institut de Recerca de la Biodiversitat, Departament de Biologia Animal, Universitat de Barcelona, Avinguda Diagonal 643, 08028 Barcelona, Spain;2. IRTA, Aqüicultura, Cultius Aquàtics, 43540 Sant Carles de la Ràpita, Tarragona, Spain;3. c/Nou 8, 43839 Creixell, Tarragona, Spain;1. Department of Ecosystem Studies, Royal Netherlands Institute for Sea Research NIOZ-Yerseke, Korringaweg 7, 4401CT Yerseke, The Netherlands;2. Faculty of Geosciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands;1. CFE, Center for Functional Ecology, Department of Life Sciences, University of Coimbra, Apartado 3046, 3001-401 Coimbra, Portugal;2. Department of Chemistry & Center for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193 Aveiro, Portugal;3. School of Technology and Management, Polytechnic of Viana do Castelo, Avenida do Atlântico, 4900-348 Viana do Castelo, Portugal;1. Agrocampus Ouest, UMR 985 ESE Ecologie et santé des écosystèmes, F-35042 Rennes, France;2. Ifremer, EMH, rue de l''île d''Yeu, BP 21105, 44311 Nantes Cedex 03, France;3. Ifremer, LRH-LR, Place Gaby Coll, 17137 L''Houmeau, France |
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| Abstract: | The purpose of this paper was to establish the main characteristics of the suprabenthic communities of the English Channel including those found in a potential aggregate extraction zone located in the central part. Sampling was carried out with a Macer-GIROQ sledge during four periods in 2007. In this offshore site, the suprabenthic faunal composition and abundance were close to those observed in other similar sites in coarse sand to pebbles in the western and eastern parts of the English Channel. But, the species richness was low (65 species). Amphipods were the dominant group in terms of diversity and abundance. Only a few species, mostly amphipods and decapods, showed significant daily migration. Seasonal variations were moderate. Due to the similar suprabenthic fauna having good swimming ability, the aggregate extraction zone in the central part of the Channel could be rapidly colonized after exploitation and thus could rapidly insure a feeding resource for fish, which are attracted by abundant prey. |
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