Faculty Publications

Stream Microcosm Toxicity Tests: Predicting The Effects Of Fenvalerate On Riffle Insect Communities

Document Type

Article

Keywords

Aquatic insects, Fenvalerate, Stream microcosms, Toxicity

Journal/Book/Conference Title

Environmental Toxicology and Chemistry

Volume

13

Issue

3

First Page

381

Last Page

387

Abstract

Stream microcosms were used to predict toxicity of the pyrethroid insecticide fenvalerate to riffle insect assemblages. Over a 30‐d test period, stream microcosms were exposed in triplicate to 0.0, 0.01, 0.1, 1.0, or 10.0 μg/L fenvalerate. Effects were determined by statistically comparing insect abundances over all concentrations. Initial exposure resulted in a significant increase in drift in the 1.0‐ and 10.0‐μg/L treatments. After 30 d, several taxa exhibited density reductions at 0.01 μg/L, but this reduction was significant for only one taxon. Densities of most other taxa decreased significantly at 0.1 μ/L. Significant reductions in species richness and total density also were observed at 0.1 μg/L fenvalerate. Overall, the results suggest that at environmental concentrations of 0.1 μg/L, mayflies and stoneflies would be eliminated and riffle beetles, caddisflies, and some chironomids would be present in significantly reduced numbers. Copyright © 1994 SETAC

Department

Department of Biology

Original Publication Date

1-1-1994

DOI of published version

10.1002/etc.5620130304

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