, Volume 96, Issue 2, pp 177–184

Effects of sediment releases from a reservoir on stream macroinvertebrates

  • Lawrence J. Gray
  • James V. Ward

DOI: 10.1007/BF02185433

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.



Copyright information

© Dr W. Junk Publishers 1982

Authors and Affiliations

  • Lawrence J. Gray
    • 1
  • James V. Ward
    • 1
  1. 1.Department of Zoology and EntomologyColorado State UniversityFort CollinsU.S.A.