Exploring change in the relative abundance of marine megafauna in the Bay of Biscay, 2004–2016
| Autor: | Ghislain Dorémus, Jérôme Spitz, Mathieu Doray, Jacques Masse, Jean-Jacques Boubert, Olivier Van Canneyt, Gérard Gautier, Pierre Petitgas, Vincent Ridoux, Matthieu Authier, Erwan Duhamel |
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| Přispěvatelé: | Observatoire PELAGIS UMS 3462 (PELAGIS), LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), LIttoral ENvironnement et Sociétés - UMR 7266 (LIENSs), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Ifremer Centre Atlantique, Institut National de la Recherche Agronomique (INRA)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Distance sampling Relative abundance Marine megafauna Good Environmental Status Ecology 010604 marine biology & hydrobiology Biodiversity Geology Aquatic Science 010603 evolutionary biology 01 natural sciences Marine Strategy Framework Directive Oceanography 13. Climate action Megafauna [SDE]Environmental Sciences Ecosystemic surveys Environmental science Marine ecosystem 14. Life underwater MSFD Bay Relative species abundance |
| Zdroj: | Progress in Oceanography Progress in Oceanography, Elsevier, 2018, 166, pp.159-167. ⟨10.1016/j.pocean.2017.09.014⟩ Progress In Oceanography (0079-6611) (Pergamon-elsevier Science Ltd), 2018-09, Vol. 166, P. 159-167 |
| ISSN: | 0079-6611 |
| DOI: | 10.1016/j.pocean.2017.09.014⟩ |
| Popis: | International audience; Conservation has moved from species-centered to ecosystem-based approaches: the Marine Strategy Framework Directive requires the maintenance or restoration of ‘Good Environmental Status’ of all European marine waters. Monitoring biodiversity at the scale of whole ecosystems is salient, but challenging owing to the large spatial scale involved and the large spatio-temporal heterogeneity of marine ecosystems. We capitalized on the integrated ecosystemic PELGAS survey carried out in spring in the Bay of Biscay to document patterns of change in marine megafauna relative abundance at the community level over more than a decade (2004–2016). The relative abundance of the twenty-three most frequently sighted species (6 cetaceans and 17 seabirds) was estimated by distance sampling, and averaged over the study period and area. Temporal changes were investigated with a Dynamic Factor Analysis. This exploratory analysis suggested that approximately one third of all species showed an increase, another third a decrease, and the last third no overall change in relative abundance. The relative abundance of offshore species, including that of all studied cetaceans, slightly increased in spring between 2004 and 2016. Further investigations will correlate the uncovered changes at the marine megafauna community level with concommittent biological and oceanographic processes that are routinely monitored on the PELGAS integrated ecosystemic surveys. |
| Databáze: | OpenAIRE |
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