Complete genome sequences of 34 Arctic marine bacteria.

We report the complete genome sequences of 34 Arctic marine bacteria, including 16 (SAR11), 4 (SUP05), 2 SAR116, and 4 . These cultures and closed genomes enhance the understanding of microbial diversity in the Arctic and the evolutionary processes underlying adaptation.

Genomic diversity and adaptation in Arctic marine bacteria.

Arctic marine bacteria experience seasonal changes in temperature, salinity, light, and sea ice cover. Time-series and metagenomic studies have identified spatiotemporal patterns in Arctic microbial communities, but a lack of complete genomes has limited efforts to identify the extent of genomic diversity in Arctic populations. We cultured and sequenced the complete genomes of 34 Arctic marine bacteria to identify patterns of gene gain, loss, and rearrangement that structure genomes and underlie adaptations to Arctic conditions.