1. State Key Laboratory of Black Soils Conservation and Utilization Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences Changchun China
2. College of Earth Science Jilin University Changchun China
3. Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains (Ministry of Education), School of Geographical Sciences Northeast Normal University Changchun China
4. Department Biology San Diego State University San Diego California USA
5. Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs Huazhong Agricultural University Wuhan China
6. International Institute for Earth System Science, Nanjing University Nanjing China