Effects of sediment releases from a reservoir on stream macroinvertebrates |
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Authors: | Lawrence J Gray James V Ward |
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Institution: | (1) Department of Zoology and Entomology, Colorado State University, 80523 Fort Collins, CO, U.S.A. |
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Abstract: | Effects of sediment release from Guernsey Reservoir on macroinvertebrates of the North Platte River, Wyoming, were investigated during summer 1981. Suspended solids concentrations during sediment release increased from <20 mg l–1 to >300 mg l–1. Because fine particulates remained in suspension, mean particle size of substrates was unaltered. Densities of chironomids decreased 90% + during sediment release but recovered to initial levels in 3 weeks after the release ended. Densities of mayflies and oligochaetes increased. Changes in benthic populations were highly correlated with increases in suspended solids. |
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Keywords: | sediment reservoir stream macroinvertebrates |
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