1. GFZ German Research Centre for Geosciences, Section Geomicrobiology, Potsdam, Germany
2. GFZ German Research Centre for Geosciences, Section Organic Geochemistry, Potsdam, Germany
3. University of Bonn, Institute of Nutritional and Food Sciences, Food Microbiology and Hygiene, Bonn, Germany
4. GFZ German Research Centre for Geosciences, Section Interface Geochemistry, Potsdam, Germany
5. University of Potsdam, Institute of Biochemistry and Biology, Potsdam, Germany
6. University of Potsdam, Institute of Geoscience, Potsdam, Germany