Dr. Wiebke Mohr¹, Mertcan Esti¹, Miriam Philippi¹, Julia Duerschlag¹, Timothy G Ferdelman¹, Jennifer Tolman², Julie LaRoche², Clara Martínez-Pérez¹, Gaute Lavik³, Bernhard Tschitschko¹, Hon Lun Wong³, Alexandra Kraberg⁴, Sten Littmann³, Abiel T Kidane¹ and Marcel M M Kuypers¹, (1)Max Planck Institute for Marine Microbiology, Bremen, Germany, (2)Dalhousie University, Department of Biology, Halifax, NS, Canada, (3)Max Planck Institute for Marine Microbiology, Department of Biogeochemistry, Bremen, Germany, (4)Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Polar Biological Oceanography, Bremerhaven, Germany