1. College of Water Sciences Beijing Normal University Beijing China
2. Plants and Ecosystems, Department of Biology University of Antwerp Antwerp Belgium
3. Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences University of Oslo Oslo Norway
4. Centre for Coastal Research (CCR), Department of Natural Sciences University of Agder Kristiansand Norway
5. Terrestrial Ecology Section, Department of Biology University of Copenhagen Copenhagen Ø Denmark
6. Center for Permafrost (CENPERM) University of Copenhagen Copenhagen K Denmark
7. Department of Physical Geography and Ecosystem Science Lund University Lund Sweden
8. Swiss Federal Institute for Forest, Snow and Landscape Research (WSL) Birmensdorf Switzerland
9. Institute of Integrative Biology ETH Zurich (Swiss Federal Institute of Technology) Zurich Switzerland