1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
2. University of Chinese Academy of Sciences, Beijing, China
3. Renmin University of China, Beijing, China
4. Centre for Ecology and Hydrology, Oxon, UK
5. James Hutton Institute, Aberdeen, Scotland, UK
6. Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden
7. International Center for Climate and Global Change Research, and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL, USA
8. The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA, USA
9. Harvard Forest, Harvard University, Woods Hole, MA, USA