Dernière mise à jour le : 20 janvier 2016

Implementation of a new index to assess intertidal seaweed communities as bioindicators for the European Water Framework Directory


An index CCO (cover, characteristic species, opportunistic species) has been developed for the implementation of the European Water Framework Directory (WFD) in coastal waters, using intertidal macroalgal communities as bio-indicator (Biological Quality Element). CCO is based on the calculation of three metrics corresponding to the global cover of macroalgal communities (metric 1), the number of characteristic species per topographic level/seaweed community (metric 2) and the cover of opportunistic species (metric 3). The final rating is obtained by pooling the scores of the three metrics. Results are given for 32 sites in 29 water bodies, grouped into four biogeographic regions along the Channel–Atlantic coasts of France. Over the six-year study, most of sites were sampled twice each (every three years). CCO index revealed that 25 coastal water bodies of both the Channel and the Bay of Biscay were in good or high ecological quality status (EQS), whereas only 4 of them were moderate and none in poor to bad status. However, significant differences have been found between sites and between geographic regions, water bodies located in Brittany obtaining the best EQS. No significant change occurred between the three-year sampling sets. A significant correlation has been established between a three-component anthropogenic pressure index and CCO ratings, showing the accuracy of CCO to evaluate the impact of anthropic activities on the structure and development of macroalgal communities as indicator of the ecological quality of coastal water bodies.


keyboard_arrow_right Titre : Implementation of a new index to assess intertidal seaweed communities as bioindicators for the European Water Framework Directory
keyboard_arrow_right Type de documentation : Articles
keyboard_arrow_right Auteur(s) personne(s) : Miossec, Laurence , Bréret, Martine , Buchet, Rémi , Barille, Anne-laure , Joncourt, Yves , Hacquebart, Pascal , Poisson, Emeline , Gevaert, François , Casamajor (de), Marie-Noëlle , Sauriau, Pierre-guy , Le Duff, Michel , Ar Gall, Erwan
keyboard_arrow_right Date de publication : 20 janvier 2016
keyboard_arrow_right Editeur(s) : Elsevier
keyboard_arrow_right Tags thématiques : algue, eaux côtières, zone intertidale, littoral maritime, macrophyte
keyboard_arrow_right Mots-clés libres : water framework directory/macroalgal communities/intertidal seaweeds/quality index/coastal water bodies/European Water Framework Directory/coastal waters/Brittany
keyboard_arrow_right Langue : Anglais
keyboard_arrow_right N° d'édition (ISBN,DOI...) : 10.1016/j.ecolind.2015.06.035
keyboard_arrow_right Collection : Ecological Indicators

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