Effects of sediment releases from a reservoir on stream macroinvertebrates
- Cite this article as:
- Gray, L.J. & Ward, J.V. Hydrobiologia (1982) 96: 177. doi:10.1007/BF02185433
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.