Upper Midwest Environmental Sciences Center

Figure 1d. Estimated power to detect temporal trends in mayfly relative abundance in Pool 13, all current samples allocated to the impounded stratum (n = 120). Trends assumed exponential.

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Estimating power to detect temporal trends in LTRM metrics

Figure 1d. Estimated power to detect temporal trends in mayfly (Ephemeridae) relative abundance in Pool 13, all present samples (n = 120) allocated to the impounded stratum. Trends assumed exponential.

larger scale

Figure 1d

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.

Page Last Modified: April 17, 2018