Upper Midwest Environmental Sciences Center

Summary of Monitoring Findings for Fiscal Year 2004: Figure 18
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folder.gifLTRMP 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.

Page Last Modified: April 17, 2018