Matthias Wietz¹, Katja Metfies², Wilken-Jon von Appen³, Sinhue Torres-Valdes⁴, Magda Cardozo⁵, Christina Bienhold⁶ and Antje Boetius⁴, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Germany, (2)Jacobs University, Germany, (3)Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany, (4)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (5)Max Planck Institute for Marine Microbiology, Bremen, Germany, (6)Max Planck Institute for Marine Microbiology, HGF-MPG Group for Deep Sea Ecology and Technology, Bremen, Germany