Upper Midwest Environmental Sciences Center

Figure 1a. Estimated power to detect temporal trends in mayfly relative abundance in Pool 13 under half the current sampling intensity (n = 60). Trends assumed exponential.

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Estimating power to detect temporal trends in LTRM metrics

Figure 1a. Estimated power to detect temporal trends in mayfly (Ephemeridae) relative abundance in Pool 13 under half the present sampling intensity (n = 60). Trends assumed exponential.

larger scale

Figure 1a

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