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