1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2. Ailaoshan Station for Subtropical Forest Ecosystem Studies, Chinese Academy of Sciences, Jingdong, Yunnan 676200, China
3. Center for Advances in Water and Air Quality, Lamar University, Beaumont, Texas 77710, United States
4. University of Chinese Academy of Sciences, Beijing 100049, China