1. Department of Geomicrobiology, Center for Applied Geosciences, University of Tübingen, Tübingen, Germany
2. Department of Organic Paleobiogeochemistry, Max Planck Institute for Biogeochemistry, Jena, Germany
3. MARUM–Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
4. Department of Bioscience, Center for Geomicrobiology, Aarhus University, Aarhus, Denmark