1. Department of Microbiology and Plant Biology, University of Oklahoma, Norman, Oklahoma, USA
2. Institute for Environmental Genomics, University of Oklahoma, Norman, Oklahoma, USA
3. USDA, Agricultural Research Service, Grazinglands Research Laboratory, El Reno, Oklahoma, USA
4. School of Civil Engineering and Environmental Sciences, University of Oklahoma, Norman, Oklahoma, USA
5. Earth and Environmental Sciences, Lawrence Berkeley National Laboratory, Berkeley, California, USA