1. Institute of Ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes Peking University Beijing China
2. Department of Evolutionary Biology and Environmental Studies University of Zurich Zurich Switzerland
3. Department of Environmental Systems Science Swiss Federal Institute of Technology ETH Zurich Zurich Switzerland
4. School of Life Sciences Inner Mongolia University Hohhot China
5. Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi China
6. State Key Laboratory of Vegetation and Environmental Changes Institute of Botany Chinese Academy of Sciences Beijing China
7. Key Laboratory of Forest Ecology and Environment State Forestry Administration, Research Institute of Forest Ecology Environment and Protection Chinese Academy of Forestry Beijing China
8. Department of Geography University of Zurich Zurich Switzerland