Funding for this research was provided by:
the National Natural Science Foundation of China (51778180)
he University Key Laboratory of Karst Ecology and Environmental Change of Guangxi Province (YRHJ15Z009)
Innovation Project of Guangxi Graduate Education (XYCSZ2018067)
Article History
Received: 29 January 2019
Accepted: 15 April 2019
First Online: 1 May 2019