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Pole-to-pole biogeography of surface and deep marine bacterial communities
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2012 (English)In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 109Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2012. Vol. 109
Keyword [en]
bipolar biodiversity next-generation sequencing microbial ecology ribosomal-rna genes arctic-ocean archaeal assemblages sea-ice bacterioplankton diversity ecology waters Science & Technology - Other Topics
National Category
Natural Sciences
Research subject
SWEDARP 2007/08, Oden Southern Ocean 2007/08
Identifiers
URN: urn:nbn:se:polar:diva-1899DOI: 10.1073/pnas.1208160109OAI: oai:DiVA.org:polar-1899DiVA: diva2:810499
Note

ISI Document Delivery No.: 038AO Times Cited: 37 Cited Reference Count: 38 Ghiglione, Jean-Francois Galand, Pierre E. Pommier, Thomas Pedros-Alio, Carlos Maas, Elizabeth W. Bakker, Kevin Bertilson, Stefan Kirchman, David L. Lovejoy, Connie Yager, Patricia L. Murray, Alison E. Lovejoy, Connie/A-3756-2008; Galand, Pierre/A-1429-2014; Ghiglione, Jean-Francois/A-7540-2011; Yager, Patricia/K-8020-2014 Lovejoy, Connie/0000-0001-8027-2281; Galand, Pierre/0000-0002-2238-3247; Yager, Patricia/0000-0002-8462-6427 Sloan Foundation; W.M. Keck Foundation award; Institut Francais pour la Recherche et la Technologie Polaires; Spanish Ministry of Education and Science; New Zealand International Polar Year-Census of Antarctic Marine Life Project [So001IPY, IPY2007-01]; Natural Sciences and Engineering Council (NSERC) of Canada; National Science Foundation [OPP-0124733, ANT-0632389, ANT-0741409]; Swedish Polar Research Secretariat We thank the members of field teams, shipboard crews, and logistics support personnel from all national polar programs involved in sample collection, without whom this study would not have been possible. The Census of Antarctic Marine Life, funded by the Sloan Foundation, facilitated this collaboration. Pyrosequencing was provided by the International Census of Marine Microbes (ICoMM) with financial support from a W.M. Keck Foundation award to the Marine Biological Laboratory in Woods Hole. Funding to support sample collection was provided by the Institut Francais pour la Recherche et la Technologie Polaires (J.-F.G.); the Spanish Ministry of Education and Science (C.P.-A.); the New Zealand International Polar Year-Census of Antarctic Marine Life Project [Phases 1 (So001IPY) and 2 (IPY2007-01); to E.W.M.); the Natural Sciences and Engineering Council (NSERC) of Canada (C.L.); National Science Foundation Grants OPP-0124733 (to D.L.K.), ANT-0632389 (to A.E.M.), and ANT-0741409 (to P.L.Y.); and the Swedish Polar Research Secretariat (S.B.). 39 Natl acad sciences Washington Multidisciplinary Sciences

Available from: 2015-05-07 Created: 2015-05-06 Last updated: 2016-11-25Bibliographically approved

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