1. Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Tuebingen D-72074, Germany
2. College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China
3. Quantitative Biology Center (QBiC), University of Tuebingen, Tuebingen D-72076, Germany
4. Cluster of Excellence: EXC 2124: Controlling Microbes to Fight Infection, Tuebingen 72076, Germany
5. Department of Marine Sciences, University of Georgia, 325 Sanford Dr., Athens, Georgia 30602-3636, United States
6. Geomicrobiology, Center for Applied Geosciences, University of Tubingen, Tuebingen D-72074, Germany
7. Department of Environmental Microbiology, Institute for Sanitary Engineering, Water Quality and Solid Waste Management (ISWA), University of Stuttgart, Stuttgart 70569, Germany