Data/hora: 10/06/2024 11:11:23

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
País: 	France	
Título: 	Exploring Change in the Relative Abundance of Marine Megafauna in the Bay of Biscay, 2004-2016	
Autores: 	Authier, Matthieu; Doremus, Ghislain; Van Canneyt, Olivier; Boubert, Jean-jacques; Gautier, Gerard; Doray, Mathieu; Duhamel, Erwan; Masse, Jacques; Petitgas, Pierre; Ridoux, Vincent; Spitz, Jerome.	
Data: 	2018-09	
Ano: 	2018	
Palavras-chave: 	Marine megafauna; Relative abundance; MSFD; Ecosystemic surveys.	
Resumo: 	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.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00403/51405/51981.pdf

DOI:10.1016/j.pocean.2017.09.014

http://archimer.ifremer.fr/doc/00403/51405/	
Editor: 	Pergamon-elsevier Science Ltd	
Formato: 	application/pdf	
Fonte: 	Progress In Oceanography (0079-6611) (Pergamon-elsevier Science Ltd), 2018-09 , Vol. 166 , P. 159-167	
Fonte: 	2017 Elsevier Ltd. All rights reserved.

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