1. Department of Biology; Norwegian University of Science and Technology NTNU; Trondheim; NO-7491; Norway
2. Norwegian Institute for Nature Research; PO Box 5685 Sluppen; Trondheim; NO-7485; Norway
3. Tromsø University Museum; Tromsø; NO-9037; Norway
4. Museum of Natural History and Archaeology; Norwegian University of Science and Technology; Trondheim; NO-7491; Norway
5. Malmö Museer; Box 406; Malmö; SE-201 24; Sweden
6. Department of Arctic and Marine Biology; University of Tromsø; Tromsø; NO-9037; Norway
7. Southern Swedish Forest Research Centre; Swedish University of Agricultural Sciences; Box 49; Alnarp; SE-23053; Sweden
8. Center for Macroecology, Evolution and Climate; Department of Biology; University of Copenhagen; Universitetsparken 15; Copenhagen; Ø DK-2100; Denmark
9. Department of Botany; Stockholm University; Stockholm; SE-106 91; Sweden
10. Ecologie et Dynamique des Systèmes Anthropisés (EA 4698); Plant Biodiversity Lab; Jules Verne University of Picardie; 1 rue des Louvels; Amiens; Cedex 1; FR-80037; France
11. Institute of Ecology FB 2; University of Bremen; Leobener Str.; Bremen; DE-28359; Germany
12. Department of Ecology and Environmental Science; Umeå University; Umeå; SE-901 87; Sweden
13. Biodiversity & Conservation; Department of Bioscience; Aarhus University; Grenåvej 14; Rønde; DK-8410; Denmark
14. Ecological & Environmental Change Research Group; Department of Biology; University of Bergen; PO Box 7803; Bergen; NO-5020; Norway
15. Department of Geosciences and Geography; University of Helsinki; Helsinki; FI-00014; Finland
16. Climate Impacts Research Centre; Department of Ecology and Environmental Science; Umeå University; Abisko; SE-98107; Sweden
17. Institute of Ecology and Earth Sciences; University of Tartu; Tartu; EE-51005; Estonia
18. Telemark University College; Bø; NO-3800; Norway
19. Faculty of Engineering and Science; University of Agder; Service Box 422; Kristiansand; NO-4604; Norway
20. Department of Education; University of Tromsø; Tromsø; NO-9037; Norway
21. Norwegian Institute for Agricultural and Environmental Research; Fureneset; Hellevik; NO-6967; Norway
22. Department of Biology; University of Oulu; Oulu; FI-90014; Finland
23. Ecoinformatics & Biodiversity Group; Department of Bioscience; Aarhus University; Ny Munkegade 114; Aarhus C; DK-8000; Denmark