1. Guizhou Institute of Forest Inventory and Planning; Guiyang 550003 China
2. Key Laboratory of Aquatic Botany and Watershed Ecology; Wuhan Botanical Garden; Chinese Academy of Sciences; Wuhan 430074 China
3. Department of Biological Sciences; Tennessee State University; Nashville TN 37209 USA
4. Jiangxi Provincial Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology; Nanchang Institute of Technology; Nanchang 330099 China