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Distinct spatial patterns of SAR11, SAR86, and actinobacteria diversity along a transect in the ultra-oligotrophic South Pacific ocean
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West, Nyree J., Lepère, Cécile, Manes, Carmem-Lara de O., Catala, Philippe, Scanlan, David J. and Lebaron, Philippe (2016) Distinct spatial patterns of SAR11, SAR86, and actinobacteria diversity along a transect in the ultra-oligotrophic South Pacific ocean. Frontiers in Microbiology, 7 . 234. doi:10.3389/fmicb.2016.00234 ISSN 1664-302X.
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Official URL: http://dx.doi.org/10.3389/fmicb.2016.00234
Abstract
Distinct distribution patterns of members of the major bacterial clades SAR11, SAR86, and Actinobacteria were observed across a transect from the Marquesas islands through the ultra-oligotrophic South Pacific Gyre into the Chilean upwelling using 16S rRNA gene sequencing and RNA–DNA fingerprinting. Three different Actinobacteria sequence clusters belonging to “Candidatus Actinomarinidae” were localized in the western half of the transect, one was limited to the gyre deep chlorophyll maximum (DCM) and sequences affiliated to the OCS155 clade were unique to the upwelling. The structure of the surface bacterial community was highly correlated with water mass and remained similar across the whole central gyre (1300 nautical miles). The surface hyperoligotrophic gyre was dominated (>70% of all sequences) by highly diverse SAR11 and SAR86 operational taxonomic units and these communities were significantly different from those in the DCM. Analysis of 16S rRNA fingerprints generated from RNA allowed insights into the potential activity of assigned bacterial groups. SAR11 and Prochlorococcus showed the highest potential activity in all water masses except for the upwelling, accounting together for 65% of the total bacterial 16S rRNA in the gyre surface waters in equal proportions whereas the contribution of SAR11 decreased significantly at the DCM.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QR Microbiology | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||
Library of Congress Subject Headings (LCSH): | Actinobacteria -- Marquesas Islands -- South Pacific Ocean -- Chile | ||||||||
Journal or Publication Title: | Frontiers in Microbiology | ||||||||
Publisher: | Frontiers Research Foundation | ||||||||
ISSN: | 1664-302X | ||||||||
Official Date: | March 2016 | ||||||||
Dates: |
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Volume: | 7 | ||||||||
Article Number: | 234 | ||||||||
DOI: | 10.3389/fmicb.2016.00234 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 21 March 2016 | ||||||||
Date of first compliant Open Access: | 21 March 2016 | ||||||||
Funder: | Centre national de la recherche scientifique (France) (CNRS), Les Enveloppes Fluides et l'Environnement (France) (LEFE), Agence nationale de recherches sur le SIDA (France) (ANRS) | ||||||||
Grant number: | 06-BDIV-013 (ANRS) |
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