1. Forest Ecology and Conservation Group, Department of Plant Sciences University of Cambridge Cambridge UK
2. Swiss Federal Institute for Forest, Snow and Landscape Research WSL Birmensdorf Switzerland
3. UR “Ecologie et dynamique des systèmes anthropisés” (EDYSAN, UMR 7058 CNRS‐UPJV) Université de Picardie Jules Verne Amiens France
4. Forest & Nature Lab, Department of Environment Ghent University Melle‐Gontrode Belgium
5. Leibniz‐ZALF e.V. Müncheberg Müncheberg Germany
6. Department of Plant Sciences University of Oxford Oxford UK
7. Southern Swedish Forest Research Centre Swedish University of Agricultural Sciences Alnarp Sweden
8. Institute of Botany Czech Academy of Sciences Průhonice Czech Republic
9. Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Czech Republic
10. Faculty of Forestry Technical University in Zvolen Zvolen Slovakia
11. Department Silviculture and Forest Ecology of the Temperate Zones University of Göttingen Göttingen Germany
12. Forest Ecology and Forest Management Group Wageningen University Wageningen The Netherlands
13. Białowieża Geobotanical StationFaculty of Biology University of Warsaw Białowieża Poland