1. Department of Ecology, Evolution, and Behavior University of Minnesota Twin Cities 1987 Upper Buford Circle Saint Paul MN 55108 USA
2. USDA, Agricultural Research Service, Pasture Systems and Watershed Management Research Unit University Park PA 16802 USA
3. German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Deutscher Platz 5e 04103 Leipzig Germany
4. Institute of Biology Leipzig University Johannisallee 21 04103 Leipzig Germany
5. Agri‐Food & Biosciences Institute (AFBI) Newforge Lane Belfast BT9 5PX UK
6. Environmental Sciences Policy and Management University of California Berkeley Berkeley CA 94720‐3114 USA
7. Department of Environmental Studies University of California Santa Cruz CA 95064 USA
8. Department of Agronomy Iowa State University Ames IA 50011 USA
9. USDA, Agricultural Research Service, Grassland, Soil & Water Research Laboratory Temple TX 76502 USA
10. Centro Universitario de la Costa Universidad de Guadalajara Puerto Vallarta Jalisco 48280 Mexico
11. Geobotany, Faculty of Biology University of Freiburg Schaenzlestr, 1 79104 Freiburg Germany