MarieFanny Racault¹, Erik Buitenhuis¹, Lionel Guidi², Matt Sullivan³, Anne-Claire Baudoux⁴, Rui Ying¹ and Corinne Le Quere¹, (1)University of East Anglia, School of Environmental Sciences, Norwich, United Kingdom, (2)Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, UMR 7093 LOV, Villefranche-sur-Mer, France, (3)The Ohio State University, Department of Microbiology, Columbus, United States, (4)CNRS, UMR7144 Station Biologique de Roscoff, Roscoff, France