1. National Hulunber Grassland Ecosystem Observation and Research Station Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences Beijing China
2. School of Grassland Science Beijing Forestry University Beijing China
3. College of Grassland Science and Technology China Agricultural University Beijing China
4. Key Laboratory of Forest Ecology and Management Institute of Applied Ecology, Chinese Academy of Sciences Shenyang China
5. Key Laboratory of Vegetation Ecology, Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station Institute of Grassland Science, Northeast Normal University Changchun China
6. Disturbance Ecology, Bayreuth Center of Ecology and Environmental Research University of Bayreuth Bayreuth Germany
7. Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences Beijing China