Steffen Kutterolf¹, Mark Brenner², Armin Freundt¹, Jens Kallmeyer³, Sergei Katsev⁴, Sebastian Krastel⁵, Axel Meyer⁶, Liseth Perez⁷, Juanita Rausch⁸, Armando Saballos⁹, Antje Schwalb⁷ and Wilfried Strauch¹⁰, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)University of Florida, Ft Walton Beach, FL, United States, (3)GFZ Potsdam, Geomicrobiology, Potsdam, Germany, (4)University of Minnesota Duluth, Duluth, MN, United States, (5)University of Kiel, Institut fuer Geowissenschaften, Kiel, Germany, (6)University of Konstanz, Institute of Zoology and Evolutionary Biology, Konstanz, Germany, (7)Technical University of Braunschweig, Braunschweig, Germany, (8)University of Fribourg, Fribourg, Switzerland, (9)Instituto Nicaragüense de Estudios Territoriales, Managua, Nicaragua, (10)INETER Instituto Nicaragüense de Estudios Territoriales, Managua, Nicaragua