1. State Key Laboratory of Agricultural Microbiology; College of Resources and Environment, Huazhong Agricultural University; Wuhan 430070 China
2. Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment; Huazhong Agricultural University; Wuhan 430070 China
3. Environmental Futures Research Institute; School of Environment, Griffith University; Nathan Queensland 4111 Australia