1. Systematic Botany and Functional Biodiversity Institute of Biology Leipzig University Leipzig 04103 Germany
2. German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Leipzig 04103 Germany
3. Plant Ecology and Nature Conservation Group Department of Environmental Sciences Wageningen University PO Box 47 Wageningen 6700 AA the Netherlands
4. Oak Ridge National Laboratory Climate Change Science Institute and Environmental Sciences Division Oak Ridge TN 37831 USA
5. Sustainable Grassland Systems Leibniz Centre for Agricultural Landscape Research (ZALF) Paulinenaue 14641 Germany
6. Institute of Biology/Geobotany and Botanical Garden Martin Luther University Halle‐Wittenberg Halle 06108 Germany
7. Department of Earth and Planetary Sciences Rutgers University New Brunswick NJ 08854 USA
8. Theoretical and Experimental Ecology Station (SETE) National Center for Scientific Research (CNRS) Moulis 09200 France
9. Biodiversity, Macroecology & Biogeography Faculty of Forest Sciences and Forest Ecology University of Goettingen Göttingen 37077 Germany
10. Functional Biogeography Max Planck Institute for Biogeochemistry Jena 07745 Germany
11. Soil Biology Group Department of Environmental Sciences Wageningen University PO Box 47 Wageningen 6700 AA the Netherlands
12. Department of Botany University of Wyoming Laramie WY 82071 USA
13. Functional Forest Ecology Department of Biology Universität Hamburg Barsbüttel‐Willinghusen 22885 Germany
14. Plant Sciences (IBG‐2) Forschungszentrum Jülich GmbH Jülich 52425 Germany
15. Department of Biological Sciences Macquarie University North Ryde NSW 2109 Australia
16. CEFE, CNRS, EPHE, IRD University Montpellier Montpellier 34293 France
17. Department of Earth and Environmental Sciences The University of Manchester Manchester M13 9PL UK
18. Institute of Ecology and Earth Sciences University of Tartu Tartu 51005 Estonia
19. Institute of Environment Department of Biological Sciences Florida International University Miami FL 33199 USA
20. Noble Research Institute, LLC Ardmore OK 73401 USA
21. The Root Lab Center for Tree Science The Morton Arboretum Lisle IL 60515 USA