1. Department of Biology and Microbiology South Dakota State University Brookings South Dakota USA
2. Current address: Department of Biology Westfield State University Westfield, Massachusettes USA
3. Plant Ecology and Evolution, Department of Ecology and Genetics, EBC Uppsala University Uppsala Sweden
4. Institut des Sciences de la Évolution, Centre National de la Recherche Scientifique University of Montpellier Montpellier France
5. Current address: Plant Ecology, Bayreuth Center of Ecology and Environmental Research (BayCEER) University of Bayreuth Universitätsstrasse 30 Bayreuth Germany
6. Department of Biology College of Charleston South Carolina USA
7. Oak Lake Field Station South Dakota State University Brookings South Dakota USA