Interactions between metals and their distribution in tissues ofLittorina littorea(L.) collected from clean and polluted sites

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Abstract
Specimens ofLittorina littoreafrom unpolluted (Menai Bridge) and metal polluted (Restronguet Creek) sites have been analysed for ten metals in eight different tissues. The concentrations of metals in whole animals and in individual tissues have been subjected to linear correlation analysis to establish metal/metal and tissue/tissue interactions. The results indicate that copper and magnesium are accumulated independently by specific connective tissue cells. Group A metals are largely accumulated by the digestive gland whereas group B metals are concentrated by the kidney. At low levels of metals there may be competition for particular ligands but at higher levels of pollution new ligands may be induced in particular cells. The implications of these interactions are discussed in terms of cell physiology and related to the significance of the use of biological organisms as indicators of metal pollution.

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