The Features of Heavy Metal Accumulation in Water, Bottom Sediments and Biota of the Cherkalov Sor Bay at Lake Baikal
Z. I. KHAZHEEVA1, N. M. PRONIN2, L. D. RADNAEVA1 , ZH. N. DUGAROV2 and S. D. URBAZAEVA1
1Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences,
Ul. Sakhyanovoy 8, Ulan Ude 670046 (Russia) E-mail: zkhazh@binm.bsc.buryatia.ru
2Institute of General and Experimental Biology, Siberian Branch of the Russian Academy of Sciences,
Ul. Sakhyanovoy 6, Ulan Ude 670046 (Russia)
Pages: 95-102
Abstract
The seasonal dynamics of heavy metals (Fe, Mn, Zn, Cu, Cr, Ni, Co, Cd, Pb) in water, bottom sediments is shown; their concentrations in the higher aquatic plants (Elodea canadensis) and in zoobenthos (mollusca bivalvia) from the Cherkalov Sor bay of Lake Baikal are analyzed. It was established that the maximum permissible concentrations for fishery water bodies are exceeded for Fe, Mn, Zn, Cu in water all year long, for Pb during spring tide. The concentrations of all these metals in bottom sediments in fractions <60 mm exceeds the background values by 20-50 %, accumulation of Cd is almost 3 times higher. It is shown that redistribution of Mn, Zn, Cu, Cd is substantially affected by aquatic plants and molluscs.
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