Jasmin Stimpfle¹, Morten H. Iversen^2,3, Florian Koch¹, Hannah Marchant⁴, Philina Borowski, PhD-Student⁵, Mr. Frederik Bussmann¹, Berenice Ebner¹, Jeffrey B. McQuaid⁶, Ingrid Stemac¹, Anja Terbrueggen¹, Christian Voelkner⁷ and Scarlett Trimborn¹, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Polar Biological Oceanography, Bremerhaven, Germany, (3)MARUM - University of Bremen, Bremen, Germany, (4)Max Planck Institute for Marine Microbiology, Bremen, Germany, (5)Leibniz Institute for Baltic Sea Research Warnemünde, Biological Oceanography, Rostock, Germany, (6)Scripps Institution of Oceanography, La Jolla, United States, (7)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Ecological Chemistry, Bremerhaven, Germany