1. School of Natural Resources and Environment University of Michigan 440 Church Street Ann Arbor MI 48109 USA
2. Section of Earth and Environmental Sciences Institute F.‐A. Forel University of Geneva Versoix Switzerland
3. Statistics Department North Carolina State University 2311 Stinson Drive Raleigh NC 27695‐8203 USA
4. Department of Ecology, Evolution and Marine Biology University of California Santa Barbara CA 93106‐9620 USA
5. Aquatic Ecology Eawag (Swiss Federal Institute of Aquatic Science and Technology) Dübendorf 8600 Switzerland
6. Institute of Plant Sciences University of Bern Altenbergrain 21 Bern Switzerland
7. Centro de Investigaciones del Mar y la Atmósfera Conicet/Universidad de Buenos Aires C1428EGA Buenos Aires Argentina
8. Department of Plant Biology University of Georgia 2502 Miller Plant Sciences Athens GA 30602 USA
9. Institute of Biochemistry and Biology, Biodiversity Research/Systematic Botany University of Potsdam Maulbeerallee 1 14469 Potsdam Germany
10. Berlin‐Brandenburg Institute of Advanced Biodiversity Research (BBIB) Altensteinstr 6 14195 Berlin Germany
11. Department of Forest Resources University of Minnesota 1530 Cleveland Avenue N Saint Paul MN USA
12. Hawkesbury Institute for the Environment University of Western Sydney Penrith NSW 2751 Australia
13. College of Biological Sciences University of Minnesota 1987 Upper Buford Circle Saint Paul MN 55108 USA
14. Bren School of Environmental Science and Management University of California Santa Barbara CA 93106 USA
15. Department of Nature Conservation and Plant Ecology Wageningen University Droevendaalsesteeg 3 6708PB Wageningen The Netherlands