1. Department of Biological Science, Section Ecology and Evolution, Florida State University Tallahassee, Florida 32306-4120, USA; E-mail: lakner@scs.fsu.edu (C.L.)
2. School of Computational Science, Florida State University Tallahassee, Florida 32306-4120, USA
3. Department of Integrative Biology, 3060 VLSB 3140, University of California, Berkeley Berkeley, CA 94720-3140, USA
4. Departments of Botany and of Statistics, University of Wisconsin at Madison Wisconsin 53706, USA