1. Research Institute for Biosciences; University of Mons (UMONS); Place du Parc 20 B-7000 Mons Belgium
2. Evolutionary Biology & Ecology; Université Libre de Bruxelles (ULB); Av. F.D. Roosevelt 50 B-1050 Brussels Belgium
3. Departamento de Ecologia; Universidade de Brasília; Campus Universitário Darcy Ribeiro Brasília - DF 70910-900 Brazil
4. Center for Ecology, Evolution and Environmental Changes (CE3C); Faculdade de Ciencias da Universidade de Lisboa; 1749-016 Lisboa Portugal
5. Naturalis Biodiversity Center; Biodiversity Dynamics; postbus 9517 2300 RA Leiden The Netherlands
6. Institute for Biodiversity and Ecosystems Dynamics (IBED) -Computational Geo-Ecology; University of Amsterdam; Amsterdam The Netherlands
7. Earth and Life Institute - Research group Genetics, Reproduction, Populations; University of Louvain; Croix du Sud 2 Box L7.05.14 1348 Louvain-la-Neuve Belgium
8. Alterra; Center for Ecosystem studies; Droevendaalsesteeg 3 P.O. Box 47 6700 AA Wageningen The Netherlands
9. Nature Conservation and Plant Ecology Group; Wageningen University; Bornsesteeg 69 6708 PD Wageningen The Netherlands
10. Unit of Analytical Chemistry; University of Liège; Gembloux Agro-Bio Tech Passage des Déportés 2 B-5030 Gembloux Belgium
11. Industrial Biological Chemistry unit; University of Liège; Gembloux Agro-Bio Tech; Passage des Déportés 2 B-5030 Gembloux Belgium