Upper Midwest Environmental Sciences Center
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LTRMP Reports
Summary
of Monitoring Findings for Fiscal Year 2004
Figures| Figure 18. | Mean midge (Chironomidae) abundance in the Upper Mississippi River System from 1993 to 2004. Horizontal lines are grand means. The Open River Reach was dropped from the macroinvertebrate monitoring design in 2001. Pools 4 and 26 of the Upper Mississippi River and La Grange Pool of the Illinois River were not sampled in 2003. |
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U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/reports_publications/ltrmp/2004/summary_findings/figure18.html
Page Contact Information: Contacting the Upper Midwest Environmental Sciences Center
Page Last Modified:
October 2, 2007
