Global biogeography of SAR11 marine bacteria
- Brown, MV
- Lauro, FM
- Demaere, MZ
- Muir, L
- Wilkins, D
- Thomas, T
- Riddle, MJ
- Fuhrman, JA
- Andrews-Pfannkoch, C
- Hoffman, JM
- McQuaid, JB
- Allen, A
- Rintoul, SR
- Cavicchioli, R
DOIAbstract
The ubiquitous SAR11 bacterial clade is the most abundant type of organism in the worldĝ€™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 ĝ̂'2 to 30°C. Our data show a stable co-occurrence of phylotypes within both ĝ€̃ tropicalĝ€™ (>20°C) and ĝ€̃ polarĝ€™ (<10°C) biomes, highlighting ecological niche differentiation between major SAR11 subgroups. All phylotypes display transitions in abundance that are st...
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