1. School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, P. R. China
2. Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, 38124 Braunschweig, Germany
3. Department of Geosciences, Princeton University, Princeton, New Jersey 08544, United States
4. Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey 08544, United States