1. College of Forestry Henan Agricultural University Zhengzhou China
2. Erguna Forest‐Steppe Ecotone Research Station Institute of Applied Ecology, Chinese Academy of Sciences Shenyang China
3. School of Grassland Science Beijing Forestry University Beijing China
4. Institute of Landscape and Plant Ecology University of Hohenheim Stuttgart Germany
5. Urat Desert‐Grassland Research Station, Northwest Institute of Eco‐Environment and Resources Chinese Academy of Science Lanzhou China
6. W.K. Kellogg Biological Station Michigan State University Hickory Corners Michigan USA
7. Department of Biology University of New Mexico Albuquerque New Mexico USA
8. State Key Laboratory of Vegetation and Environmental Change Institute of Botany, Chinese Academy of Sciences Beijing China