1. Department of Ecology and Conservation Biology, Texas A&M University, 2258 TAMU College Station TX 77843 USA
2. U.S. Geological Survey, Columbia Environmental Research Center 4200 E. New Haven Road Columbia MO 65201 USA
3. Streams Program, Oklahoma Department of Wildlife Conservation 9097 N. 34th St. W. Porter OK 74454 USA
4. The Nature Conservancy 2424 Spruce Street Boulder CO 80302 USA