1. Natural History Research Center, Shanghai Natural History Museum, Shanghai Science & Technology Museum, Shanghai, China
2. State Key Laboratory of Grassland Agro-Ecosystem, School of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
3. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, and Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, China
4. School of Earth and Environment, and The UWA Institute of Agriculture, The University of Western Australia, Perth, Australia