Abstract
Abstract The geochemical control of cadmium (Cd) availability to invertebrates in lake water is examined. In particular, the influence of lake water acidity on the bioconcentration factors (BCF’s) for Cd in various organisms is investigated. The relationship between BCF and pH is inverse for some organisms and not significantly different than zero for others. This is taken as evidence that factors other than geochemistry influence metal concentrations in organisms. Specific examples of the importance of physiological and behavioural processes are given. The hypothesis that the differences in the relationship between BCF and pH for different organisms is related to surface adsorption of metal is discussed.
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