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Stream Microcosm Toxicity Tests: Colonizing Test Organisms And Predicting The Effects Of Fenvalerate On Riffle Insect Communities, Dan H. Breneman
Stream Microcosm Toxicity Tests: Colonizing Test Organisms And Predicting The Effects Of Fenvalerate On Riffle Insect Communities, Dan H. Breneman
Dissertations and Theses @ UNI
Small streams and rivers draining agricultural watersheds are frequently exposed to hazardous chemicals. Unfortunately, chemical registration procedures currently do not include standardized protocols capable of predicting chemical impacts in lotic ecosystems. Three experiments were conducted utilizing artificial streams and rock-filled artificial substrates in an attempt to further standardize stream microcosm test procedures.
In the first experiment stream microcosms were used to predict the effects of a synthetic pyrethroid insecticide on riffle insect communities. Aquatic macroinvertebrates colonized on artificial substrates were placed in artificial streams and dosed in triplicate at 0.0, 0.01, 0.1, 1.0, and 10.0 ug/L fenvalerate (cyano (3-phenoxyphenyl) methyl-4- …