1. Research Department Potsdam; Alfred Wegener Institute for Polar and Marine Research; Potsdam Germany
2. Helmholtz Center Potsdam, GFZ German Research Center for Geosciences; Section 4.3 Organic Geochemistry; Potsdam Germany
3. Now at Newcastle University; School of Civil Engineering and Geosciences; Newcastle Upon Tyne United Kingdom
4. Helmholtz Zentrum München; Research Unit for Environmental Genomics; Oberschleissheim Germany
5. Research Institute of Organic Agriculture (FiBL); Soil Sciences Division; Frick Switzerland
6. Tyumen State Oil and Gas University; Tyumen Russia
7. Now at Helmholtz Center Potsdam; GFZ German Research Center for Geosciences, Section 4.5 Geomicrobiology; Potsdam Germany