supported by the National Natural Science Foundation of China(41130640,41321001,31470402);the Program for Changjiang Scholars and Innovative Research Team in University(IRT1108);the Fundamental Research Funds for the Central Universities(2012CXQT07)
The arid and semi-arid northwestern China has been undergoing ecological degradation and the efforts to reverse the ecological degradation have been undertaken for many years. Some shifting dunes have been fixed and t...