1. Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
2. Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
3. Helsinki Institute of Sustainability Science (HELSUS), Helsinki, Finland
4. Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
5. DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, California, USA