1. Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada
2. State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
3. China Green Carbon Foundation, No. 18, Hepingli Dongjie, Beijing 100714, China
4. College of Economics and Management, Northeast Forestry University, Harbin 150040, China