1. Biodiversity & Conservation; Department of Bioscience; Aarhus University; Grenåvej 14 DK-8410 Rønde Denmark
2. Ecoinformatics & Biodiversity; Department of Bioscience; Aarhus University; DK-8000 Aarhus C Denmark
3. School of Biology; University of Leeds; LS2 9JT Leeds UK
4. Naturalis Biodiversity Center; P.O. Box 9517 2300RA Leiden The Netherlands
5. Centre for Ecology, Evolution and Environmental Changes (CE3C); Faculdade de Ciências da Universidade de Lisboa; 1749-016 Lisboa Portugal
6. Institute for Biodiversity and Ecosystem Dynamics (IBED); University of Amsterdam; P.O. Box 94248 1090 GE Amsterdam The Netherlands
7. Department of Community Ecology; Helmholtz Centre for Environmental Research - UFZ; Theodor-Lieser-Strasse 4 DE-06210 Halle Germany
8. Aarhus Institute of Advanced Studies; Aarhus University; Høegh-Guldbergs Gade 6B DK-8000 Aarhus C Denmark
9. Arctic Research Centre; Aarhus University; DK-8000 Aarhus C Denmark