1 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås 1431, Norway.
2 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: zhujianxing2008@yeah.net.
3 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
4 Research Station of Changbai Mountain Forest Ecosystems, Chinese Academy of Sciences, Yanbian 133613, China.
5 Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås 1431, Norway.
6 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Center for Ecological Research, Northeast Forestry University, Harbin 150000, China. Electronic address: henp@igsnrr.ac.cn.