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Diversity andstability of anestuarine trophicnetwork Jérémy LobryValérie DavidStéphanie Pasquaud2007 год

Diversity and stability of an estuarine trophic network
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Аннотация: MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 358:13-25 (2008) - DOI: https://doi.org/10.3354/meps07294 Diversity and stability of an estuarine trophic network Jérémy Lobry1,*, Valérie David2, Stéphanie Pasquaud3, Mario Lepage3, Benoît Sautour2, Eric Rochard3 1Ifremer, Centre de Nantes, Département EMH, Rue de l’Ile d’Yeu, BP 21105, 44311 Nantes Cedex 3, France 2Laboratoire d’Océanographie Biologique, UMR 5805 Université Bordeaux I – CNRS, 2 rue du Professeur Jolyet, 33120 Arcachon, France 3Cemagref, Groupement de Bordeaux, Unité Ecosystèmes estuariens et poissons migrateurs amphihalins, 50 avenue de Verdun, 33612 Cestas, France *Email: jeremy.lobry@ifremer.fr ABSTRACT: Estuarine areas provide highly valuable ecosystem benefits for human populations, despite being under intense demographic, economic and ecological pressures. Hence, an understanding of the structure and function of estuarine ecosystems is essential for understanding the persistence and stability of these ecosystems and their response to perturbations. This study synthesises available data and knowledge about the Gironde estuary (SW France) in a mass-balanced trophic model to illustrate potential key patterns in the functioning of the estuarine ecosystem and key elements of its stability. In order to evaluate the total direct and indirect impact on the whole community of the 2 main sources of anthropogenic perturbations in the estuarine area, mortalities induced by fishing and the Blayais nuclear power plant were included in the model. The results suggest that in the Gironde, a typical heterotrophic estuary, there is an asymmetrical flow between distinct and complementary energy channels that enhances the stability of the food web. This dynamic process is illustrated by differential trophic flows in the water column according to the seasons. The succession of species in the environment indicates an optimisation of the use of the available carbon resources over a typical year by the estuarine biological communities. Finally, it seems that an increase in human impacts could significantly affect the topology and functioning of the food web by altering stabilizing elements of the network and decreasing the diversity of trophic flows that insures resilience of the trophic structure. KEY WORDS: Estuarine ecosystem · Food web · Network analysis · Stability · Diversity · Ecopath · Gironde estuary Full text in pdf format PreviousNextCite this article as: Lobry J, David V, Pasquaud S, Lepage M, Sautour B, Rochard E (2008) Diversity and stability of an estuarine trophic network. Mar Ecol Prog Ser 358:13-25. https://doi.org/10.3354/meps07294 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 358. Online publication date: April 21, 2008 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2008 Inter-Research.
Год издания: 2007
Авторы: Jérémy Lobry, Valérie David, Stéphanie Pasquaud, Mario Lepage, Benoît Sautour, Éric Rochard
Издательство: Inter-Research
Источник: Marine Ecology Progress Series
Ключевые слова: Marine and fisheries research, Marine Bivalve and Aquaculture Studies, Isotope Analysis in Ecology
Другие ссылки: Marine Ecology Progress Series (PDF)
Marine Ecology Progress Series (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
Institutional Archive of Ifremer (French Research Institute for Exploitation of the Sea) (HTML)
Institutional Archive of Ifremer (French Research Institute for Exploitation of the Sea) (PDF)
Institutional Archive of Ifremer (French Research Institute for Exploitation of the Sea) (HTML)