Response of vegetation community structure, soil carbon sequestration, and water-holding capacity in returning farmland to grassland plots, in the agro-pastoral transitional zone in the Three Rivers Source Region

• Ling Li, 
• Hui-dan He, 
• Ya-xi Wei, 
• Yong-sheng Yang, 
• Jin Luo, 
• Hong-qin Li, 
• Ying-nian Li, 
• Hua-kun Zhou