1. Norwegian Institute for Nature Research, FRAM − High North Research Centre on Climate and the Environment, NO-9296 Tromsø, Norway
2. Norwegian Institute for Air Research, FRAM − High North Research Centre on Climate and the Environment, NO-9296 Tromsø, Norway
3. Department of Biology, Norwegian University of Science and Technology, NO-7491
Trondheim, Norway
4. Norwegian Polar Institute, FRAM − High North Research Centre on Climate and the Environment, NO-9296 Tromsø, Norway
5. Norwegian Institute for Water Research, Gaustadalléen 21, NO-0349
Oslo, Norway