Felix Milke¹, Selene Sanchez², Jesse McNichol³, Jed A Fuhrman³, Irene Wagner-Döbler² and Meinhard Simon⁴, (1)Institute for Chemistry and Biology of the Marine Environment (ICBM), Biology of Geological Processes - Aquatic Microbial Ecology, Oldenburg, Germany, (2)Institute of Microbiology, TU Braunschweig, Braunschweig, Germany, Germany, (3)University of Southern California, Los Angeles, CA, United States, (4)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Biology of Geological Processes - Aquatic Microbial Ecology, Oldenburg, Germany