1. Department of Life Sciences University of Trieste Trieste Italy
2. Biodiversity, Macroecology and Biogeography University of Goettingen Göttingen Germany
3. Department of Management, Economics and Quantitative Methods University of Bergamo Bergamo Italy
4. Wageningen Environmental Research Wageningen The Netherlands
5. Department of Sciences University of Rome III Roma Italy
6. Department of Chemistry and Pharmacy University of Sassari Sassari Italy
7. Department of Vegetation and Phytodiversity Analysis Albrecht von Haller Institute of Plant Sciences University of Goettingen Göttingen Germany
8. School of Science Auckland University of Technology Auckland New Zealand
9. Department of Biology University of Pisa Pisa Italy
10. Normandie Univ UNIROUEN INRAE, ECODIV Rouen France
11. Team Vegetation, Forest and Landscape Ecology Alterra Green World Wageningen The Netherlands
12. Department of Botany Rhodes University Grahamstown South Africa
13. Institute of Biology and Environmental science Working Group of Vegetation Science and Nature conservation University of Oldenburg Oldenburg Germany
14. Department of Biology University of North Carolina Chapel Hill NC USA
15. Franklin Institute of North American Studies University of Alcalá Alcalá de Henares Spain
16. Biological, Geological and Environmental Sciences Department University of Catania Catania Italy
17. Centre of Biodiversity and Sustainable Land Use (CBL) University of Goettingen Göttingen Germany