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Annual status report, 1995: Macroinvertebrate sampling


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In 1992, macroinvertebrate sampling was initiated in Pools 4, 8, 13, 26, the Open River reach of the Mississippi River, and La Grange Pool of the Illinois River as part of the Long Term Resource Monitoring Program. Longterm monitoring is needed to detect population trends and local changes in aquatic ecosystems. Mayflies (Ephemeroptera), fingernail clams (Sphaeriidae), and the exotic Corbicula species were selected for monitoring. Midges (Chironomidae) were added to the sampling design in 1993 and zebra mussels (Dreissena polymorpha) were added in 1995. Mayflies, fingernail clams, and midges, members of the soft-substrate community, were chosen because they play an important ecological role in the Upper Mississippi River System. Sampling [...]


(other) :
Jennifer S Sauer


Spatial Services

ScienceBase WMS


  • Upper Midwest Environmental Sciences Center (UMESC)



Data source
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U.S. Geological Survey, Environmental Management Technical Center, Onalaska, Wisconsin

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