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dc.contributor.authorThompson, Luke R.
dc.contributor.authorField, Chris
dc.contributor.authorRomanuk, Tamara
dc.contributor.authorNgugi, David
dc.contributor.authorSiam, Rania
dc.contributor.authorEl Dorry, Hamza
dc.contributor.authorStingl, Ulrich
dc.date.accessioned2014-08-27T09:50:40Z
dc.date.available2014-08-27T09:50:40Z
dc.date.issued2013-05-11
dc.identifier.citationThompson LR, Field C, Romanuk T, Kamanda Ngugi D, Siam R, et al. (2013) Patterns of ecological specialization among microbial populations in the Red Sea and diverse oligotrophic marine environments. Ecology and Evolution 3: 1780-1797. doi:10.1002/ece3.593.
dc.identifier.issn20457758
dc.identifier.pmid23789085
dc.identifier.doi10.1002/ece3.593
dc.identifier.urihttp://hdl.handle.net/10754/325398
dc.description.abstractLarge swaths of the nutrient-poor surface ocean are dominated numerically by cyanobacteria (Prochlorococcus), cyanobacterial viruses (cyanophage), and alphaproteobacteria (SAR11). How these groups thrive in the diverse physicochemical environments of different oceanic regions remains poorly understood. Comparative metagenomics can reveal adaptive responses linked to ecosystem-specific selective pressures. The Red Sea is well-suited for studying adaptation of pelagic-microbes, with salinities, temperatures, and light levels at the extreme end for the surface ocean, and low nutrient concentrations, yet no metagenomic studies have been done there. The Red Sea (high salinity, high light, low N and P) compares favorably with the Mediterranean Sea (high salinity, low P), Sargasso Sea (low P), and North Pacific Subtropical Gyre (high light, low N). We quantified the relative abundance of genetic functions among Prochlorococcus, cyanophage, and SAR11 from these four regions. Gene frequencies indicate selection for phosphorus acquisition (Mediterranean/Sargasso), DNA repair and high-light responses (Red Sea/Pacific Prochlorococcus), and osmolyte C1 oxidation (Red Sea/Mediterranean SAR11). The unexpected connection between salinity-dependent osmolyte production and SAR11 C1 metabolism represents a potentially major coevolutionary adaptation and biogeochemical flux. Among Prochlorococcus and cyanophage, genes enriched in specific environments had ecotype distributions similar to nonenriched genes, suggesting that inter-ecotype gene transfer is not a major source of environment-specific adaptation. Clustering of metagenomes using gene frequencies shows similarities in populations (Red Sea with Pacific, Mediterranean with Sargasso) that belie their geographic distances. Taken together, the genetic functions enriched in specific environments indicate competitive strategies for maintaining carrying capacity in the face of physical stressors and low nutrient availability. 2013 The Authors. Ecology and Evolution.
dc.language.isoen
dc.publisherWiley
dc.rights© 2013 Published by John Wiley & Sons Ltd.
dc.rightsRe-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.
dc.rightsArchived with thanks to Ecology and Evolution
dc.rights.urihttp://creativecommons.org/licenses/by/2.5/
dc.subjectCyanophage
dc.subjectMetagenomics
dc.subjectOsmolyte
dc.subjectPelagibacter
dc.subjectPopulation genomics
dc.subjectProchlorococcus
dc.subjectSAR11
dc.titlePatterns of ecological specialization among microbial populations in the Red Sea and diverse oligotrophic marine environments
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentMarine Microbial Ecology Research Group
dc.contributor.departmentMarine Science Program
dc.contributor.departmentRed Sea Research Center (RSRC)
dc.identifier.journalEcology and Evolution
dc.identifier.pmcidPMC3686209
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Math and Statistics, Dalhousie University, Halifax, NS, B3H 3J5, Canada
dc.contributor.institutionDepartment of Biology, Dalhousie University, Halifax, NS, B3H 3J5, Canada
dc.contributor.institutionDepartment of Biology, The American University of Cairo, New Cairo, 11835, Egypt
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personThompson, Luke R.
kaust.personStingl, Ulrich
kaust.personNgugi, David
refterms.dateFOA2018-06-13T15:23:06Z
dc.date.published-online2013-05-11
dc.date.published-print2013-06


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© 2013 Published by John Wiley & Sons Ltd.
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