Eutrophication likely prompts metal bioaccumulation in edible clams

Coastal eutrophication is an indisputable reality and becoming a worldwide concern. However, whether and how eutrophication affects metal bioaccumulation in marine bivalves have not yet been elucidated. Here, we present the potential influence of coastal eutrophication on metal bioaccumulation in th...

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Bibliographic Details
Published in:Ecotoxicology and environmental safety 2021-11, Vol.224, p.112671, Article 112671
Main Authors: Zhao, Liqiang, Yang, Feng, Yan, Xiwu
Format: Article
Language:English
Subjects:
Bivalves
Eutrophication, metal pollution
Metal bioaccumulation
Ruditapes philippinarum
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Summary:Coastal eutrophication is an indisputable reality and becoming a worldwide concern. However, whether and how eutrophication affects metal bioaccumulation in marine bivalves have not yet been elucidated. Here, we present the potential influence of coastal eutrophication on metal bioaccumulation in the Manila clam Ruditapes philippinarum. The degree of coastal eutrophication was examined monthly over a 1-year period at three sampling sites. The bioconcentration factor (BCF), biosediment accumulation factor (BSAF) and metal pollution index (MPI) were applied to evaluate the efficiency of metal bioaccumulation in R. philippinarum. BCF and BSAF indicated that eutrophication did not significantly affect the bioaccumulation of Cr, Cu, Zn, Cd, Pb, Hg, and As in R. philippinarum. However, up to 56% of MPI variation can be related to the level of eutrophication. Therefore, further research should address the synergistic effects of eutrophication and metal pollution on coastal ecosystems. •BCF, BSAF and MPI are employed to evaluate metal accumulation in Manila clams.•Up to 56% of MPI can be related to the degree of coastal eutrophication.•Eutrophication likely prompts metal accumulation in edible bivalves.
ISSN:0147-6513
1090-2414
DOI:10.1016/j.ecoenv.2021.112671