1. Urat Desert‐grassland Research Station, Northwest Institute of Eco‐Environment and ResourcesChinese Academy of Sciences Lanzhou 730000 PR China
2. Naiman Desertification Research Station, Northwest Institute of Eco‐Environment and ResourcesChinese Academy of Sciences Lanzhou 730000 PR China
3. Desertification Monitoring CenterEcological Environmental Supervision and Administration Bureau of Gansu Province Lanzhou 730020 PR China