1. P. C. de Ruiter is in the Department of Environmental Sciences, Copernicus Research Institute for Sustainable Development and Innovation, Utrecht University, 3508 TC Utrecht, Netherlands.
2. V. Wolters is in the Department of Animal Ecology, Justus-Liebig-Universität, D-35392 Giessen, Germany.
3. J. C. Moore is in the School of Biological Sciences, University of Northern Colorado, Greeley CO 80639, USA.
4. K. O. Winemiller is in the Section of Ecology and Evolutionary Biology, Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, TX 77843, USA.