Acknowledgments
This research was financially supported by the National Natural Sciences
Foundation of China (No. U1603105 and No. 41730638) and the Key Research
Project of Frontier Sciences, CAS (No. QYZDJ-SSW-DQC014). We thank the
staff at the Fukang Station of Desert Ecology for their excellent
assistance. We would like to thank Dr.Larry Bowman at Yale University
for his assistance with English language and grammatical editing.