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Title: Background metal levels determination in bivalves - quality assessment of the European Water Framework Directive
Authors: Solaun, O.; Rodriguez, J. G.; Borja, A.; Franco, J.; Valencia, V.; Larreta, J.
Citation: CHEMISTRY AND ECOLOGY, 2013, 29, 11-27
Abstract: Background levels of metals (Ag, Cd, Cu, Cr, Hg, Ni, Pb and Zn) in biomonitors (Mytilus galloprovincialis mussels and Crassostrea gigas oysters), in estuarine waters within the Basque Country (south-east Bay of Biscay) are estimated using non-parametric statistical tools and data are presented graphically, with the aim of being used in assessing the ecological status, within the European Water Framework Directive (WFD). The basis for this study was the statistical analysis of data compiled from monitoring programmes undertaken along the Basque coast, between 1990 and 2008. For this analysis, a heuristic method was adapted and used. Results showed different metal background ranges throughout the year for both mussels and oysters. Values corresponding to the upper limit of the background range (i.e. value of the upper whisker of the box-plot) are proposed as the high/good status boundary, according to the WFD.
Keywords: background levels; mussel; oyster; metals; Water Framework Directive; SE Bay of Biscay; GALICIA NORTHWEST SPAIN; MUSSELS MYTILUS-EDULIS; HEAVY-METALS; TRACE-METALS; METHODOLOGICAL APPROACH; NORTHERN SPAIN; ESTUARINE SEDIMENTS; SEASONAL-VARIATION; COASTAL WATERS; BILBAO ESTUARY
Issue Date: 2013
Publisher: TAYLOR \& FRANCIS LTD
Type: Article
Language: English
DOI: 10.1080/02757540.2012.704912
URI: http://dspace.azti.es/handle/24689/567
ISSN: 0275-7540
Appears in Publication types:Artículos científicos



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