Jennifer Dannheim¹, Melanie Bergmann², Lilian Boehringer², Saskia Brix³, Christiane Hasemann¹, Rebecca McPherson², Katja Metfies², Barbara Niehoff⁴, Autun Purser⁵, Jannik Schnier⁶, Sinhue Torres Valdes⁷, Wilken-Jon von Appen⁸, Frank Wenzhofer⁹, Matthias Wietz² and Thomas Soltwedel⁹, (1)Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (3)Senckenberg Marine Research, Hamburg, Germany, (4)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Polar Biological Oceanography, Bremerhaven, Germany, (5)Alfred-Wegener-Institute Helmholtz-Centrum for Polar and Marine Research, Bremerhaven, Germany, (6)Alfred Wegener Institute, Bremerhaven, Germany, (7)Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Phytoplankton Ecophysiology, Bremerhaven, Germany, (8)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Physical Oceanography of the Polar Seas, Bremerhaven, Germany, (9)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, HGF-MPG Joint Research Group for Deep-Sea Ecology and Technology, Bremerhaven, Germany