1. Institute of hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
2. University of Chinese Academy of Sciences, Beijing 100049, PR China
3. Pacific Northwest National Laboratory, Richland, WA 99354, USA
4. Center for Microbial Ecology, Michigan State University, East Lansing, MI 48824, USA
5. Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089, USA
6. Institute for Environmental Genomics and Department of Plant Biology and Microbiology, University of Oklahoma, OK, Norman, OK 73019, USA