Upper Midwest Environmental Sciences Center
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Figures| Figure 11. | Estimated mean density of midges (Chironomidae; number m-2) by study area, weighted by areas of strata from 1993 to 2000, Upper Mississippi River System. |
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U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/reports_publications/ltrmp/2000/summary_findings/figure11.html
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Page Last Modified:
October 2, 2007
