1. Natural Resource Sciences University of Akureyri Akureyri Iceland
2. Faculty of Life and Environmental Sciences University of Iceland Reykjavík Iceland
3. Department of Ecological Science Vrije Universiteit Amsterdam Amsterdam Netherlands
4. Environmental Microbial Genomics Laboratoire Ampère, CNRS, École Centrale de Lyon Écully France
5. German Research Centre for Geosciences (GFZ) Interface Geochemistry Potsdam Germany
6. Faculty of Environmental and Forest Sciences Agricultural University of Iceland Reykjavík Iceland
7. Department of Earth Sciences Free University of Berlin Berlin Germany
8. BioMedical Center University of Iceland Reykjavík Iceland