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Environmental controls over bacterial communities in polar desert soils

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dc.contributorVirginia Techen
dc.contributor.authorGeyer, Kevin M.en
dc.contributor.authorAltrichter, Adam E.en
dc.contributor.authorVan Horn, David J.en
dc.contributor.authorTakacs-Vesbach, Cristina D.en
dc.contributor.authorGooseff, Michael N.en
dc.contributor.authorBarrett, John E.en
dc.contributor.departmentBiological Sciencesen
dc.date.accessed2014-01-08en
dc.date.accessioned2014-01-10T20:07:56Zen
dc.date.available2014-01-10T20:07:56Zen
dc.date.issued2013-10en
dc.description.abstractProductivity-diversity theory has proven informative to many investigations seeking to understand drivers of spatial patterns in biotic communities and relationships between resource availability and community structure documented for a wide variety of taxa. For soil bacteria, availability of organic matter is one such resource known to influence diversity and community structure. Here we describe the influence of environmental gradients on soil bacterial communities of the McMurdo Dry Valleys, Antarctica, a model ecosystem that hosts simple, microbially-dominated foodwebs believed to be primarily structured by abiotic drivers such as water, organic matter, pH, and electrical conductivity. We sampled 48 locations exhibiting orders of magnitude ranges in primary production and soil geochemistry (pH and electrical conductivity) over local and regional scales. Our findings show that environmental gradients imposed by cryptogam productivity and regional variation in geochemistry influence the diversity and structure of soil bacterial communities. Responses of soil bacterial richness to carbon content illustrate a productivity-diversity relationship, while bacterial community structure primarily responds to soil pH and electrical conductivity. This diversity response to resource availability and a community structure response to environmental severity suggests a need for careful consideration of how microbial communities and associated functions may respond to shifting environmental conditions resulting from human activity and climate variability.en
dc.description.sponsorshipNational Science Foundation's Office of Polar Programs 1027284, 0838922en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationKevin M. Geyer, Adam E. Altrichter, David J. Van Horn, Cristina D. Takacs-Vesbach, Michael N. Gooseff, and J. E. Barrett 2013. Environmental controls over bacterial communities in polar desert soils. Ecosphere 4:art127. http://dx.doi.org/10.1890/ES13-00048.1en
dc.identifier.doihttps://doi.org/10.1890/es13-00048.1en
dc.identifier.issn2150-8925en
dc.identifier.urihttp://hdl.handle.net/10919/24806en
dc.identifier.urlhttp://www.esajournals.org/doi/pdf/10.1890/ES13-00048.1en
dc.language.isoenen
dc.publisherEcological Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAntarctic Dry Valleysen
dc.subjectbiogeographyen
dc.subjectenvironmental gradientsen
dc.subjectmicrobialen
dc.subjectecologyen
dc.subjectproductivity/diversity theoryen
dc.subjectmcmurdo dry valleysen
dc.subjectsouthern victoria landen
dc.subjectribosomal-rna genesen
dc.subjectmicrobial diversityen
dc.subjectspecies richnessen
dc.subjectantarctic soilsen
dc.subjectnematodeen
dc.subjectcommunitiesen
dc.subjectbiotic interactionsen
dc.subjectplant-communitiesen
dc.subjecttaylor valleyen
dc.subjectEnvironmental Sciences & Ecologyen
dc.titleEnvironmental controls over bacterial communities in polar desert soilsen
dc.title.serialEcosphereen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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