Abstract
SUMMARY. 1. Effects of copper on species composition and production of benthic insects in an oligotrophic stream dosed at low concentrations (2.5‐15 μg 1‐1 Cur; approximately 12‐75 ng 1‐1 Cu2+) were determined. Dosing was initially in autumn‐early winter when peak densities of many species occur. It was resumed the following summer near the time of egg hatch of most species and continued through the remaining aquatic stages of univoltine and multivoltine taxa.
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