Dynamics of metal accumulation in the grasshopperChorthippus brunneus in contaminated grasslands |
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| Authors: | B A Hunter L M Hunter M S Johnson D J Thompson |
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| Institution: | (1) Department of Zoology, University of Liverpool, P.O. Box 147, L69 3BX Liverpool, UK;(2) Department of Botany, University of Liverpool, P.O. Box 147, L69 3BX Liverpool, UK;(3) Present address: British Petroleum International Ltd., Britannic House, Moor Lane, EC2Y 9BU London, UK;(4) Present address: Department of Biology, University of Essex, C04 3SQ Wivenhoe Park, Colchester, UK |
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| Abstract: | Copper and cadmium concentrations were monitored in a population of the grasshopperChorthippus brunneus in grasslands in and around a copper refinery. Total body copper and cadmium concentrations increased with site contamination levels from control to highly contaminated refinery site environments. Refinery site grasshoppers accumulated both metals throughout the summer and autumn reaching a peak concentration of 1,600  g/g for copper. The seasonal pattern of accumulation of copper and cadmium closely followed seasonal trends in metal contamination levels in the indigenous vegetation, particularlyAgrostis stolonifera. Copper accumulated progressively through the developmental instars ofC. brunneus. However, there was evidence of copper exclusion during the final moult. This may be linked to copper compartmentalization in the integument of the later instars. Metals were not evenly distributed within the grasshopper body; 85% of total body copper and cadmium is associated with the integument. |
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