1. National Engineering Laboratory for Applied Technology of Forestry & Ecology in South China, and Laboratory of Urban Forest Ecology of Hunan Province; the Life & Science Department, Central South University of Forestry and Technology, Changsha, Hunan Province 410004, China
2. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
3. College of Arts and Science, Governors State University, University Park, Illinois 60484, United States
4. University of Chinese Academy of Sciences, Beijing 100049, China