期刊
ENVIRONMENTAL POLLUTION
卷 145, 期 2, 页码 516-528出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2006.04.019
关键词
heavy metals; transfer; food chain; cadmium; Apodemus sylvaticus
We studied the accumulation and transfer of As, Cd, Cu, Pb and Zn in the compartments of a soil-diet-wood mouse (Apodemus sylvaticus) food chain at five sites located along a metal pollution gradient. We observed a clear gradient in metal exposure at increasing distance from the smelter in all compartments of the food chain for the non-essential metals. The gradient was less clear or absent for the essential metals in acorn and mice target tissues. Regression analysis showed overall strong relationships within the soil-diet and diet-wood mouse compartments for the non-essential metals, while relationships for the essential metals were weak or absent. Total metal in soil appeared as a better predictor for the diet metal content than the available metal fraction. Our results suggest a more important transfer of non-essential elements through the food chain than essential elements, which is probably a consequence of homeostatic control of the latter group. (c) 2006 Elsevier Ltd. All rights reserved.
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