1. College of Ecology and Environment, Hainan University, Haikou 570228, China
2. Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
3. Hainan Danzhou Tropical Agro-Ecosystem National Observation and Research Station, Danzhou 571737, China
4. Hainan Research Academy of Environmental Sciences, Haikou 571127, China