1. Department of Environmental Studies and Sciences, University of Winnipeg, Winnipeg, Manitoba R3B 2E9, Canada
2. Department of Natural Resource Sciences, McGill University, Ste-Anne-de-Bellevue, Quebec H9X 3V9, Canada
3. Geological Survey of Canada, Natural Resources Canada, Ottawa, Ontario K1A 0E8, Canada
4. Centre for Earth Observation Science, University of Manitoba, Winnipeg, Manitoba R3T 2N6, Canada
5. Environment and Climate Change Canada, Saskatoon, Saskatchewan S7N 0X4, Canada
6. Department of Biology, University of Western Ontario, London, Ontario N6A 5B7, Canada
7. Greenland Institute of Natural Resources, DK-3900 Nuuk, Greenland
8. Department of Bioscience, Arctic Research Centre, Aarhus University, DK-4000 Roskilde, Denmark