1. Sorbonne UniversitéCNRS, Laboratoire d'Océanographie Microbienne, LOMIC F‐66650 Banyuls/mer France
2. Department of Limnology and Bio‐OceanographyUniversity of Vienna, A‐1090 Vienna Austria
3. Université Perpignan Via DomitiaIHPE UMR 5244, CNRS, IFREMER, Univ. Montpellier, F‐66860 Perpignan France
4. Leibniz Institute for Baltic Sea Research Warnemünde Germany