Data/hora: 12/06/2024 14:11:55

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
País: 	France	
Título: 	Use of biotic indices in semi-enclosed coastal ecosystems and transitional waters habitats - Implications for the implementation of the European Water Framework Directive	
Autores: 	Blanchet, H; Lavesque, Nicolas; Ruellet, T; Dauvin, J; Sauriau, Pierre-guy; Desroy, Nicolas; Desclaux, C; Leconte, M; Bachelet, G; Janson, A; Bessineton, C; Duhamel, S; Jourde, J; Mayot, S; Simon, S; De Montaudouin, X.	
Data: 	2008-07	
Ano: 	2008	
Palavras-chave: 	Transitional waters; Semi enclosed coastal ecosystems; Benthic invertebrates; Directive; European Water Framework; Biotic index.	
Resumo: 	This study deals with the application of macrozoobenthos-based biotic indices (BI) within the frame of the implementation of the European Water Framework Directive. More precisely, this study aimed at assessing the performance of five recently developed methodologies (BI) for the assessment of ecological quality status (EcoQ) in two semi-enclosed, sheltered coastal ecosystems and in one transitional water body situated along the Western French coast, namely Marennes-Oleron Bay, Arcachon Bay, and the Seine Estuary. This study showed that these five indices rarely agreed with each other, describing very different pictures of the overall EcoQ of the three study sites. This work also clearly underlined the limitations of these approaches, notably the dependency of most of these BI and the resulting EcoQ classifications on habitat characteristics, more particularly to natural levels of sediment silt-clay content and the location of stations in the subtidal or the intertidal. The implication of our observations concerning the use of these BI for implementation of the WFD is discussed in terms of definition of habitat-specific reference conditions and necessity to adjust thresholds to the particular habitat occurring in semi-enclosed ecosystems. Meanwhile, the unmodified use of these BI severely impaired accurate assessment of EcoQ and decision-making on the managers' point of view. (C) 2007 Elsevier Ltd. All rights reserved.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2008/publication-3987.pdf

DOI:10.1016/j.ecolind.2007.04.003	
Editor: 	Elsevier	
Relação: 	http://archimer.ifremer.fr/doc/00000/3987/	
Formato: 	application/pdf	
Fonte: 	Ecological Indicators (1470-160X) (Elsevier), 2008-07 , Vol. 8 , N. 4 , P. 360-372	
Fonte: 	2008 Elsevier Ltd All rights reserved.