Bioaccumulation patterns of heavy metals in bivalve mollusks from natural water bodies of the East Asia. V.V. BOGATOV, L.A. PROZOROVA, E.N. CHERNOVA, E.V. LYSENKO
Keywords:
heavy metals, Mn, Fe, Ni, Cu, Zn, Cd, Pb, bioaccumulation, mollusks, Cyrenidae, Corbicula, Unionidae, Ensidens, Scabies, Kunashiria, natural lakes, Primorsky Krai, Mekong River Delta.Abstract
Concentrations of seven heavy metals in tissues of bivalve mollusks of the families Unionidae (genera Ensidens,
Scabies, Kunashiria) and Cyrenidae (genus Corbicula) from four natural lakes in Primorsky Krai (Russia) and Vietnam are determinated. Heavy metal accumulation of studied bivalve species in Unionidae and Cyrenidae is specific for every family and does not depend on the species occurrence. The mean concentrations of metals in Unionidae decreased in the following order: Mn > Fe > Zn > Cu > Ni > Cd > Pb, and in Cyrenidae: Fe > Zn > Cu > Mn > Ni ≥ Cd > Pb. All studied Unionidae selectively accumulate Mn, while Cyrenidae mainly accumulates Cu. Deviations from the revealed heav metals accumulation by mollusks may be indicative the microelements pollution of water bodies or the presence of natural geochemical anomaly.
