1. Department of Microbiology Radboud University Nijmegen Nijmegen The Netherlands
2. Soehngen Institute of Anaerobic Microbiology (SIAM) Radboud University Nijmegen Nijmegen The Netherlands
3. Netherlands Earth System Science Centre (NESSC) Utrecht The Netherlands
4. Department of Earth Sciences Utrecht University Utrecht The Netherlands
5. Geomicrobiology German Research Centre for Geosciences (GFZ) Potsdam Germany