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Aquatic insects as bioindicators of trace element contamination in cobble-bottom rivers and streams

Canadian Journal of Fisheries and Aquatic Sciences

By:
, , , and
DOI: 10.1139/f92-237

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Abstract

In one river, Cu, Cd, Pb, and Zn were analysed in insects and in fine bed sediments over a 381-km reach downstream of a large copper mining complex. In another river, As contamination from a gold mine was assessed in insects and bed sediments over a 40-km reach. All insect taxa collected in contaminated river reaches had elevated whole-body trace element concentrations, but few species were distributed throughout the study reaches. Comparisons of contamination at taxomic levels higher than species were complicated by element-specific differences in bioaccumulation among taxa. These differences appeared to be governed by biological and hydrogeochemical factors. Variation in element concentrations among species of the caddisfly Hydropsyche was slightly greater than within individual species. If this genus is representative of others, comparisons of contamination within genera may be a practical alternative for biomonitoring studies when single species are not available. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Aquatic insects as bioindicators of trace element contamination in cobble-bottom rivers and streams
Series title:
Canadian Journal of Fisheries and Aquatic Sciences
DOI:
10.1139/f92-237
Volume
49
Issue:
10
Year Published:
1992
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Canadian Journal of Fisheries and Aquatic Sciences
First page:
2141
Last page:
2154