1. Aquatic Microbiology; Institute for Biodiversity and Ecosystem Dynamics; University of Amsterdam; Amsterdam The Netherlands
2. UPMC Univ Paris 06, UMR 7093, LOV, Observatoire océanologique; Villefranche/mer France
3. LOV; Observatoire océanologique; CNRS; UMR 7093; Villefranche/mer France
4. Department of Aquatic Ecology; Netherlands Institute of Ecology (NIOO-KNAW); Wageningen The Netherlands