1. General Botany University of Potsdam Potsdam Germany
2. Vegetation Ecology and Conservation Biology FB02 University of Bremen Bremen Germany
3. Institute of Ecology and Earth Sciences University of Tartu Tartu Estonia
4. Institute of Biology, Biotechnology and Environmental Protection University of Silesia Katowice Poland
5. Northwest German Forest Research Institute Department E (Forest Nature Conservation) Hannoversch Münden Germany
6. Southern Swedish Forest Research Centre Swedish University of Agricultural Sciences Uppsala Sweden
7. Department of Botany and Zoology Faculty of Science Masaryk University Brno Czech Republic
8. Ecologie et Dynamique des Systèmes Anthropisés (EDYSAN, UMR CNRS 7058) Université de Picardie Jules Verne Amiens France
9. Forest & Nature Lab Ghent University Ghent Belgium
10. Institute of Botany Jagellonian University Kraków Poland
11. Botany & Vegetation Science University of Applied Sciences Freising Germany
12. Kastrupvej 8 Haraldsted, Ringsted Denmark
13. Department of Biology Norwegian University of Science and Technology Trondheim Norway
14. Department of Biological Sciences University of Bergen Bergen Norway
15. Division Forest, Nature and Landscape University of Leuven Leuven Belgium
16. Institute for World Forestry Johann Heinrich von Thünen Institute (vTI) Hamburg Germany
17. Latvian State Forest Research Institute Silava Salaspils Latvia
18. University of Franche‐Comte UMR TheMA‐CNRS Besançon France
19. Agriculture Academy Vytautas Magnus University Kaunas Lithuania
20. Institute for Ecology Leuphana University Lüneburg Lüneburg Germany
21. Czech Academy of Sciences Institute of Botany Department of Invasion Ecology Průhonice Czech Republic
22. Department of Ecology Faculty of Science Charles University Prague Czech Republic
23. Alterra Wageningen UR Wageningen the Netherlands
24. Department of Biology Botanical Museum Lund University Lund Sweden
25. Leibniz Centre for Agricultural Landscape Research (ZALF) Research Area 2 Müncheberg Germany