1. College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan, China
2. Restoration Ecology Program, National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, Changsha, Hunan, China
3. College of Arts and Sciences, Lewis University, Romeoville, Illinois, USA
4. College of Arts and Sciences, Governors State University, University Park, Illinois, USA