1. Institute of Systematic Botany; University of Zurich; Zollikerstrasse 107 8008 Zurich Switzerland
2. Department of Ecology and Evolutionary Biology; University of Tennessee; Knoxville TN 37996 USA
3. UMR PVBMT; Université de La Réunion-CIRAD; 7 chemin de l'IRAT Ligne Paradis 97410 Saint Pierre Réunion France
4. Department of Biology; University of Missouri at St. Louis; 8001 Natural Bridge Road St. Louis MO 63121 USA
5. Laboratoire Evolution & Diversité Biologique; UMR 5174 CNRS-Université Paul Sabatier-ENFA; 31062 Toulouse Cedex 9 France
6. CNRS; UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique); Route de Saclay 91128 Palaiseau France
7. Département de Biologie; Université du Québec à Rimouski 300; Allée des Ursulines; Rimouski QC G5L 3A1 Canada
8. Institut de Biologie de l'Ecole Normale Supérieure (IBENS); UMR CNRS 8197; 46 rue d'Ulm 75005 Paris France
9. Institut des Sciences de l'Evolution; UMR 5554; CNRS; Univ. Montpellier 2; CC 065 Place Eugène Bataillon 34095 Montpellier Cedex 05 France
10. Department of Life Sciences; Imperial College London; Silwood Park Campus Ascot Berkshire SL5 7PY UK
11. Island Ecology and Biogeography Group; Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias (IUETSPC); Universidad de La Laguna; Tenerife Canary Islands Spain
12. ISRIC-World Soil Information; 6700 AJ Wageningen The Netherlands
13. Institute for Biodiversity and Ecosystem Dynamics; Institute for Interdisciplinary Studies; University of Amsterdam; Science Park 904 1098XH Amsterdam The Netherlands
14. Real Jardín Botánico; RJB-CSIC; Plaza de Murillo 2 28014 Madrid Spain
15. Department of Ecology and Taxonomy; Faculty of Biology; National and Kapodistrian University; Athens 15784 Greece
16. Oxford University Centre for the Environment; South Parks Road Oxford OX1 3QY UK
17. Unit of Evolutionary Biology/Systematic Zoology; Institute of Biochemistry and Biology; University of Potsdam; Karl-Liebknecht-Strasse 24-25 14476 Potsdam Germany
18. Division of Organisms and Environment; University of California; Berkeley CA 94720 USA
19. Island Ecology and Evolution Research Group; Instituto de Productos Naturales y Agrobiología (IPNA-CSIC); C/Astrofísico Francisco Sánchez 3 La Laguna 38206 Tenerife Canary Islands Spain
20. CESAB / FRB; Domaine du Petit Arbois; Av Louis Philibert Aix-en-Provence 13100 France