Document Detail

Pole-to-pole biogeography of surface and deep marine bacterial communities.
MedLine Citation:
PMID:  23045668     Owner:  NLM     Status:  MEDLINE    
The Antarctic and Arctic regions offer a unique opportunity to test factors shaping biogeography of marine microbial communities because these regions are geographically far apart, yet share similar selection pressures. Here, we report a comprehensive comparison of bacterioplankton diversity between polar oceans, using standardized methods for pyrosequencing the V6 region of the small subunit ribosomal (SSU) rRNA gene. Bacterial communities from lower latitude oceans were included, providing a global perspective. A clear difference between Southern and Arctic Ocean surface communities was evident, with 78% of operational taxonomic units (OTUs) unique to the Southern Ocean and 70% unique to the Arctic Ocean. Although polar ocean bacterial communities were more similar to each other than to lower latitude pelagic communities, analyses of depths, seasons, and coastal vs. open waters, the Southern and Arctic Ocean bacterioplankton communities consistently clustered separately from each other. Coastal surface Southern and Arctic Ocean communities were more dissimilar from their respective open ocean communities. In contrast, deep ocean communities differed less between poles and lower latitude deep waters and displayed different diversity patterns compared with the surface. In addition, estimated diversity (Chao1) for surface and deep communities did not correlate significantly with latitude or temperature. Our results suggest differences in environmental conditions at the poles and different selection mechanisms controlling surface and deep ocean community structure and diversity. Surface bacterioplankton may be subjected to more short-term, variable conditions, whereas deep communities appear to be structured by longer water-mass residence time and connectivity through ocean circulation.
Jean-François Ghiglione; Pierre E Galand; Thomas Pommier; Carlos Pedrós-Alió; Elizabeth W Maas; Kevin Bakker; Stefan Bertilson; David L Kirchmanj; Connie Lovejoy; Patricia L Yager; Alison E Murray
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-10-08
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  109     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-24     Completed Date:  2013-01-07     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  17633-8     Citation Subset:  IM    
Unité Mixte de Recherche 7621, Laboratoire d'Océanographie Microbienne, UMR 8222, University Pierre et Marie Curie 06, F-66650 Banyuls/mer, France.
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MeSH Terms
Antarctic Regions
Arctic Regions
Bacteria / classification,  genetics,  isolation & purification*
Marine Biology*
RNA, Ribosomal / genetics
Water Microbiology*
Reg. No./Substance:
0/RNA, Ribosomal

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