1. Department of Isotope Biogeochemistry Helmholtz Centre for Environmental Research‐UFZ Leipzig Germany
2. Institute for Chemistry and Biology of Marine Environment Carl von Ossietzky University of Oldenburg Oldenburg Germany
3. Department of Environmental Microbiology Institute of Biosciences TU‐Bergakademie Freiberg Germany
4. Department of Environmental Microbiology Helmholtz Centre for Environmental Research‐UFZ Leipzig Germany