Upper Midwest Environmental Sciences Center
Effects of landscape composition and wetland fragmentation on frog and toad abundance and species richness in Iowa and Wisconsin, U.S.A.
Knutson, M. G., Sauer, J. R., Olsen, D. A., Mossman, M. J., Hemesath, L. M., and Lannoo, M. J., 1999, Effects of landscape composition and wetland fragmentation on frog and toad abundance and species richness in Iowa and Wisconsin, U.S.A.: Conservation Biology, v. 13, no. 6, p. 1437-1446.
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/documents/publications/1999/knutson_d_1999.html
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