Abstract
1 Center for Microbial Ecology and NASA Astrobiology Institute, Michigan State University, East Lansing, MI 48824, USA
2 Department of Biology, University of Puerto Rico at Humacao, Humacao, PR 00791, Puerto Rico
3 Department of Food Science, North Carolina State University, Raleigh, NC 27695, USA
4 Institute of Physico-chemical and Biological Problems in Soil Science, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russian Federation