1. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA
2. Center for Environmental Biotechnology, Department of Microbiology, Department of Civil and Environmental Engineering, Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Tennessee, USA
3. Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
4. Department of Biology, University of Puerto Rico at Humacao, Humacao, Puerto Rico, USA
5. USDA Forest Service, International Institute of Tropical Forestry, Río Piedras, Puerto Rico, USA
6. School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA