1. Department of Biosciences University of Oslo PO Box 1066 0316 Oslo Norway
2. Marine Microbiology Department of Biology University of Bergen PO Box 7803 5006 Bergen Norway
3. Norwegian Institute for Water Research Gaustadalléen 21 0349 Oslo Norway
4. CNRS FR3631 Institut de Biologie Paris‐Seine F‐75005 Paris France
5. Sorbonne Universités UPMC Univ Paris 06 Institut de Biologie Paris‐Seine (IBPS) F‐75005 Paris France
6. Uni Research Environment Thormøhlensgate 49b N‐5006 Bergen Norway
7. Hjort Centre for Marine Ecosystem Dynamics N‐5006 Bergen Norway