1. College of Geographical Science, Fujian Normal University, Fuzhou 350007, China
2. State Key Laboratory of Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
3. Sanming Forest Ecosystem National Observation and Research Station, Sanming 365002, China
4. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China