1. Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, Norway.
2. Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria.
3. Institute of Microbiology, University of Greifswald, Greifswald, Germany.
4. PLECO, University of Antwerp, Antwerp, Belgium.
5. Agricultural University of Iceland, Borgarnes, Iceland.
6. CSIC, Global Ecology Unit CREAF-CSIC-UAB, Barcelona, Spain.
7. CREAF, Barcelona, Spain.