Eutrophication likely prompts metal bioaccumulation in edible clams

Liqiang Zhao; Feng Yang; Xiwu Yan

doi:10.1016/j.ecoenv.2021.112671

Eutrophication likely prompts metal bioaccumulation in edible clams

Ecotoxicol Environ Saf. 2021 Aug 17:224:112671. doi: 10.1016/j.ecoenv.2021.112671. Online ahead of print.

Authors

Liqiang Zhao¹, Feng Yang², Xiwu Yan³

Affiliations

¹ College of Fisheries, Guangdong Ocean University, Zhanjiang 524088, China. Electronic address: lzhao@gdou.edu.cn.
² College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China. Electronic address: yangfeng@gdou.edu.cn.
³ College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China. Electronic address: yanxiwu@dlou.edu.cn.

PMID: 34416642
DOI: 10.1016/j.ecoenv.2021.112671

Abstract

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.

Keywords: Bivalves; Eutrophication, metal pollution; Metal bioaccumulation; Ruditapes philippinarum.