1. School of Biological Sciences, The University of Hong Kong, Hong Kong, China
2. Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yunnan, China
3. Griffith School of the Environment & Environmental Futures Research Institute, Griffith University, Nathan, Australia
4. Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning, Guangxi, China