1. Forest Ecology and Conservation Group, Department of Plant Sciences, University of Cambridge, Cambridge CB23EA, UK.
2. Swiss Federal Institute for Forest, Snow and Landscape Research WSL, 8903 Birmensdorf, Switzerland.
3. Forest & Nature Lab, Department of Environment, Faculty of Bioscience Engineering, Ghent University, B-9090 Melle-Gontrode, Belgium.
4. UR “Ecologie et Dynamique des Systèmes Anthropisés” (EDYSAN, UMR 7058 CNRS-UPJV), Université de Picardie Jules Verne, 800037 Amiens Cedex 1, France.
5. Institute of Ecology and Evolution, Friedrich Schiller University Jena, D-07743 Jena, Germany.
6. Institute of Botany of the Czech Academy of Sciences, CZ-602 00 Brno, Czech Republic.
7. Department of Botany, Faculty of Science, Palacký University in Olomouc, CZ-78371 Olomouc, Czech Republic.
8. Institute of Environmental and Earth Sciences, University of Sopron, H-9400 Sopron, Hungary.
9. Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, 230 53 Alnarp, Sweden.
10. Research Institute for Nature and Forest (INBO), B-1000 Brussels, Belgium.
11. Environment Agency Austria, A-1090 Vienna, Austria.
12. Department of Plant Physiology and Ecology, University of Rzeszów, PL-35-959 Rzeszów, Poland.
13. General Botany, Insitute of Biochemistry and Biology, University of Potsdam, 14469 Potsdam, Germany.
14. Białowieża Geobotanical Station, Faculty of Biology, University of Warsaw, 17-230 Białowieża, Poland.
15. Institute of Botany of the Czech Academy of Sciences, CZ-252 43 Průhonice, Czech Republic.
16. Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, CZ-165 21 Prague 6 - Suchdol, Czech Republic.
17. Faculty of Forestry, Technical University in Zvolen, SK-960 01 Zvolen, Slovakia.
18. National Forest Centre, SK-960 01 Zvolen, Slovakia.
19. Department of Botany, Institute of Environmental Biology, University of Wrocław, PL-50-328 50 Wrocław, Poland.
20. Leibniz Centre for Agricultural Landscape Research (ZALF), D-15374 Muencheberg, Germany.
21. Department of Forestry and Renewable Forest Resources, Biotechnical Faculty, University of Ljubljana, Ljubljana 1000, Slovenia.
22. Department of Hydrobiology, Institute of Biology, University of Pécs, H-7624 Pécs, Hungary.
23. Department of Forest Biodiversity, Faculty of Forestry, University of Agriculture in Kraków, PL-32-425 Kraków, Poland.
24. Department of Silviculture and Forest Ecology of the Temperate Zones, University of Göttingen, D-37077 Göttingen, Germany.
25. Department of Plant Systematics, Ecology and Theoretical Biology, Institute of Biology, L. Eötvös University, H-1117 Budapest, Hungary.
26. Museum of Natural History, University of Wrocław, PL-50-335 Wrocław. Poland.
27. MTA-DE Lendület Functional and Restoration Ecology Research Group, H-4032 Debrecen, Hungary.