Ecoscience, Aarhus University; Yunnan University

University of California, Davis

University of Alaska Fairbanks

Professor of Biological Sciences, University of Alberta

Norwegian Institute for Nature Research

Professor, Department of Ecoscience, Aarhus University, Denmark

Professor, University of Alaska Fairbanks

Full professor, Université du Québec à Trois-Rivières & Centre d'études nordiques

University Researcher, Arctic Centre,University of Lapland, Finland

Northern Arizona University