Gonzalo V Gomez-Saez¹, Thorsten Dittmar², Anika Maria Pohlabeln¹, Moritz Holtappels^3,4, Anna Lichtschlag^5,6, Bernhard Schnetger⁷, Antje Boetius^6,8 and Jutta Niggemann¹, (1)University of Oldenburg, ICBM-MPI Bridging Group for Marine Geochemistry, Oldenburg, Germany, (2)University of Oldenburg, Oldenburg, Germany, (3)current affiliation: Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bentho-Pelagic Processes, Bremerhaven, Germany, (4)Max Planck Institute for Marine Microbiology, Department of Biogeochemistry, Bremen, Germany, (5)current affiliation: National Oceanography Centre, Geochemistry, Southampton, United Kingdom, (6)Max Planck Institute for Marine Microbiology, HGF-MPG Group for Deep Sea Ecology and Technology, Bremen, Germany, (7)University of Oldenburg, ICBM Microbiogeochemistry Research Group, Oldenburg, Germany, (8)Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, HGF-MPG Group for Deep Sea Ecology and Technology, Bremerhaven, Germany