1. Institute of Groundwater Ecology, Helmholtz Zentrum München, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany
2. Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Marchioninistrasse 17, 81377 Munich, Germany
3. Center for Applied Geoscience, University of Tübingen, Hölderlinstrasse12, 72074 Tübingen, Germany
4. Department of Environmental Microbiology, UFZ—Helmholtz Centre for Environmental Research, Permoserstrasse 15, 04318 Leipzig, Germany