1. College of Environment and Ecology, Chongqing University, Chongqing 400045, China
2. Ningxia Hui Autonomous Region Mineral and Geological Survey Institute, Yinchuan 750021, China
3. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
4. School of Business Administration, Chongqing Technology and Business University, Chongqing 400067, China
5. Laboratory of Efficient Production of Forest Resources, Yinchuan 750004, China