1. Department of Plant & Crops; Ghent University; Melle Belgium
2. Forest & Nature Lab; Ghent University; Melle-Gontrode Belgium
3. Southern Swedish Forest Research Centre; Swedish University of Agricultural Sciences; Alnarp Sweden
4. Laboratorio de Investigaciones Botánicas (LABIBO); Facultad de Ciencias Naturales; Universidad Nacional de Salta-CONICET; Salta Argentina
5. Unité de recherche “Ecologie et Dynamique des Systèmes Anthropisés” (EDYSAN, FRE3498 CNRS-UPJV); Université de Picardie Jules Verne; Amiens France
6. Biogeography and Geomatics; Department of Physical Geography; Stockholm University; Stockholm Sweden
7. Vegetation Ecology and Conservation Biology; Institute of Ecology; University of Bremen; Bremen Germany
8. Department of Biology; Norwegian University of Science and Technology; Trondheim Norway
9. School of Biological Sciences; University of Plymouth; Plymouth UK
10. General Botany; University of Potsdam; Potsdam Germany
11. Division Forest, Nature and Landscape; KULeuven; Leuven Belgium
12. Institute of Ecology and Earth Sciences; University of Tartu; Tartu Estonia
13. Department of Ecology; Faculty of Biology and Environmental Protection; University of Silesia; Katowice Poland
14. Department of Medical Biochemistry and Biophysics; Umeå University; Umeå Sweden