1. Key Lab of Urban Environment and Health; Institute of Urban Environment; Chinese Academy of Sciences; Xiamen 361021 China
2. State Key Lab of Urban and Regional Ecology; Research Center for Eco-environmental Sciences; Chinese Academy of Sciences; Beijing 100085 China
3. Department of Microbiology and Plant Biology; Institute for Environmental Genomics; University of Oklahoma; 101 David L Boren Blvd Norman OK 73019 USA
4. Center for Microbial Ecology; Department of Plant, Soil and Microbial Sciences; Michigan State University; East Lansing MI 48824 USA
5. Key Laboratory of Agro-ecological Processes in Subtropical Regions and Taoyuan Station of Agro-ecology Research; Institute of Subtropical Agriculture; Chinese Academy of Sciences; Changsha 410125 China
6. Earth Science Division; Lawrence Berkeley National Laboratory; Berkeley CA 94720 USA
7. State Key Joint Laboratory of Environment Simulation and Pollution Control; School of Environment; Tsinghua University; Beijing 100084 China