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Global biogeography of SAR11 marine bacteria


Brown, MV and Lauro, FM and DeMaere, MZ and Muir, D and Wilkins, D and Thomas, T and Riddle, MJ and Furhman, JA and Andrews-Pfannkoch, C and Hoffman, JM and McQuaid, JB and Allen, A and Rintoul, SR and Cavicchiolo, R, Global biogeography of SAR11 marine bacteria, Molecular Systems Biology, 8 Article 595. ISSN 1744-4292 (2012) [Refereed Article]


Copyright Statement

2012 EMBO and Macmillan Publishers Limited Licensed under Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0)

DOI: doi:10.1038/msb.2012.28


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.

Item Details

Item Type:Refereed Article
Keywords:adaptive radiation, Antarctica, metagenome, Pelagibacter, phylotype distribution
Research Division:Biological Sciences
Research Group:Evolutionary biology
Research Field:Biogeography and phylogeography
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Riddle, MJ (Dr Martin Riddle)
UTAS Author:Rintoul, SR (Dr Steve Rintoul)
ID Code:119084
Year Published:2012
Web of Science® Times Cited:149
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2017-07-26
Last Modified:2017-08-07
Downloads:129 View Download Statistics

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