1. Key Laboratory of Wetland Ecology and Environment; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences; Changchun 130102 PR China
2. School of Life Sciences and Global Institute of Sustainability, Arizona State University; Tempe 85287 AZ USA
3. Center for Human-Environment System Sustainability (CHESS), State Key Laboratory of Earth Surface Processes and Resource Ecology (ESPRE); Beijing Normal University; Beijing 100875 PR China
4. Institute of Remote Sensing and Digital Earth; Chinese Academy of Sciences; Beijing 100094 PR China