Global biogeography of SAR11 marine bacteria
| Type | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Date | 2012-07 | ||||||||
| Language | English | ||||||||
| Author(s) | Brown Mark V.1, 2, Lauro Federico M.1, Demaere Matthew Z.1, Muir Les3, Wilkins David1, Thomas Torsten1, 4, Riddle Martin J.5, Fuhrman Jed A.6, Andrews-Pfannkoch Cynthia7, Hoffman Jeffrey M.7, McQuaid Jeffrey B.7, Allen Andrew7, Rintoul Stephen R.8, Cavicchioli Ricardo1 | ||||||||
| Affiliation(s) | 1 : Univ New S Wales, Sch Biotechnol & Biomol Sci, Sydney, NSW 2052, Australia. 2 : Univ New S Wales, Evolut & Ecol Res Ctr, Sydney, NSW, Australia. 3 : CSIRO Marine & Atmospher Res, Ctr Australian Weather & Climate Res, Hobart, Tas, Australia. 4 : Univ New S Wales, Ctr Marine Bioinnovat, Sydney, NSW, Australia. 5 : Australian Antarct Div, Kingston, Tas, Australia. 6 : Univ So Calif, Dept Biol Sci, Wrigley Inst Environm Studies, Los Angeles, CA 90089 USA. 7 : J Craig Venter Inst, Rockville, MD USA. 8 : Antarct Climate & Ecosyst Cooperat Res Ctr, Hobart, Tas, Australia. |
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| Source | Molecular Systems Biology (1744-4292) (Nature Publishing Group), 2012-07 , Vol. 8 , N. 595 , P. 1-13 | ||||||||
| DOI | 10.1038/msb.2012.28 | ||||||||
| WOS© Times Cited | 170 | ||||||||
| Keyword(s) | adaptive radiation, Antarctica, metagenome, Pelagibacter, phylotype distribution | ||||||||
| Abstract | The ubiquitous SAR11 bacterial clade is the most abundant type of organism in the world’s oceans, but the reasons for its success are not fully elucidated. We analysed 128 surface marine metagenomes, including 37 new Antarctic metagenomes. The large size of the data set enabled internal transcribed spacer (ITS) regions to be obtained from the Southern polar region, enabling the first global characterization of the distribution of SAR11, from waters spanning temperatures −2 to 30°C. Our data show a stable co-occurrence of phylotypes within both ‘tropical’ (>20°C) and ‘polar’ (<10°C) biomes, highlighting ecological niche differentiation between major SAR11 subgroups. All phylotypes display transitions in abundance that are strongly correlated with temperature and latitude. By assembling SAR11 genomes from Antarctic metagenome data, we identified specific genes, biases in gene functions and signatures of positive selection in the genomes of the polar SAR11—genomic signatures of adaptive radiation. Our data demonstrate the importance of adaptive radiation in the organism’s ability to proliferate throughout the world’s oceans, and describe genomic traits characteristic of different phylotypes in specific marine biomes. | ||||||||
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