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Macroinvertebrate monitoring on Pool 13, Upper Mississippi River (UMR)


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Macroinvertebrate monitoring as part of the Long Term Resource Monitoring Program (LTRMP) has been conducted on the UMR Pool 13 since 1992. In this span, 37,699 targeted macroinvertebrate organisms (mayflies, fingernail clams, midges, zebra mussels, and Corbicula spp.) have been collected. Fingernail clams ranked first in total abundance from 1992 1997 with mayflies, midges, and zebra mussels ranking second, third, and fourth, respectively. Mayflies, fingernail clams, and midges reached highest densities in silt/clay substrate. Zebra mussels reached highest densities in sand and gravel/rock substrates. Targeted macroinvertebrates also exhibited preferences for habitat types and water depths. Fingernail clam and midge densities have [...]



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  • Upper Midwest Environmental Sciences Center (UMESC)



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Pages 99 117 in Fisheries Management Investigations 1997 Annual Report. Reprinted by U.S. Geological Survey, Environmental Management Technical Center, Onalaska, Wisconsin

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