Upper Midwest Environmental Sciences Center

Figure 1b. Estimated power to detect temporal trends in mayfly (Ephemeridae) relative abundance in Pool 13 under the present sampling intensity (n = 120). Trends assumed exponential.

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Disclaimer: This information is provided to help better inform ongoing LTRM partner discussions. The power plots are generated from small sample sizes; all plots should be treated as approximate.

Contact: Questions or comments may be directed to Brian Gray, LTRM statistician, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, at brgray@usgs.gov.