1. Department of Biology, Centre for Conservation Biology, Norwegian University of Science and Technology, N‐7491 Trondheim, Norway
2. School of Biological Sciences, University of Portsmouth, Portsmouth PO1 2DY, UK
3. Department of Biology, Norwegian University of Science and Technology, N‐7491 Trondheim, Norway
4. Institute of Arctic Biology, University of Alaska, Fairbanks, AK 99775, USA
5. Plant Biology and Ecology Department, University of Seville, 41080, Seville, Spain
6. Centre for Ecological and Evolutionary Synthesis, Department of Biology, University of Oslo, PO Box 1066, N‐0316 Oslo, Norway