1. Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China
2. Pingguo Guangxi, Karst Ecosystem, National Observation and Research Station, Pingguo 531406, China
3. Pingguo Baise, Karst Ecosystem, Guangxi Observation and Research Station, Pingguo 531406, China
4. Key Laboratory of Karst Dynamics, Ministry of Natural Resources & Guangxi, Guilin 541004, China
5. International Research Centre on Karst under the Auspices of United Nations Educational Scientific and Cultural Organization, Guilin 541004, China