Soeren Ahmerkamp¹, Lars Behrendt², Mathilde Godefroid³, Michael Wind-Hansen⁴, Klaus Koren⁴, Michael Kühl⁵ and Cesar Pacherres⁶, (1)Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany, (2)Uppsala University, Uppsala, Sweden, (3)Max Planck Institute for Marine Microbiology, Bremen, Germany, (4)Aarhus University, Aarhus, Denmark, (5)University of Copenhagen, Copenhagen, Denmark, (6)University of Copenhagen, Bremerhaven, Germany