community & regional




Table 2. Number of funnel traps needed per wetland to detect 2-10% positive and negative population trends over a 15 year period of annual sampling at 80% significance for Rana pipiens and Ambystoma tigrinum.

Rana pipiens Ambystoma tigrinum
% trend Positive Negative Positive Negative
10% 1 2 1 2
9% 1 2 1 2
8% 1 2 1 2
7% 1 2 1 2
6% 1 2 1 2
5% 1 3 1 3
4% 1 4 1 4
3% 2 6 3 6
2% 6 >10 6 10



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