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dc.contributor.authorLee, Kevin C.en_NZ
dc.contributor.authorCaruso, Tancredien_NZ
dc.contributor.authorArcher, Stephen D.J.en_NZ
dc.contributor.authorGillman, Len N.en_NZ
dc.contributor.authorLau, Maggie C.Y.en_NZ
dc.contributor.authorCary, S. Craigen_NZ
dc.contributor.authorLee, Charles K.en_NZ
dc.contributor.authorPointing, Stephen B.en_NZ
dc.date.accessioned2019-05-29T22:19:09Z
dc.date.available2018-11-01en_NZ
dc.date.available2019-05-29T22:19:09Z
dc.date.issued2018en_NZ
dc.identifier.citationLee, K. C., Caruso, T., Archer, S. D. J., Gillman, L. N., Lau, M. C. Y., Cary, S. C., … Pointing, S. B. (2018). Stochastic and deterministic effects of a moisture gradient on soil microbial communities in the McMurdo Dry Valleys of Antarctica. Frontiers in Microbiology, 9. https://doi.org/10.3389/fmicb.2018.02619en
dc.identifier.issn1664-302Xen_NZ
dc.identifier.urihttps://hdl.handle.net/10289/12574
dc.description.abstractAntarctic soil supports surface microbial communities that are dependent on ephemeral moisture. Understanding the response to availability of this resource is essential to predicting how the system will respond to climate change. The McMurdo Dry Valleys are the largest ice-free soil region in Antarctica. They are a hyper-arid polar desert with extremely limited moisture availability. Microbial colonization dominates this ecosystem but surprisingly little is known about how communities respond to changing moisture regimes. We utilized the natural model system provided by transiently wetted soil at lake margins in the Dry Valleys to interrogate microbial responses along a well-defined contiguous moisture gradient and disentangle responses between and within phyla. We identified a striking non-linear response among bacteria where at low moisture levels small changes resulted in a large impact on diversity. At higher moister levels community responses were less pronounced, resulting in diversity asymptotes. We postulate that whilst the main drivers of observed community diversity were deterministic, a switch in the major influence occurred from abiotic factors at low moisture levels to biotic interactions at higher moisture. Response between and within phyla was markedly different, highlighting the importance of taxonomic resolution in community analysis. Furthermore, we resolved apparent stochasticity at high taxonomic ranks as the result of deterministic interactions taking place at finer taxonomic and spatial scales. Overall the findings provide new insight on the response to moisture and this will be useful in advancing understanding of potential ecosystem responses in the threatened McMurdo Dry Valleys system.
dc.format.mimetypeapplication/pdf
dc.language.isoenen_NZ
dc.publisherFrontiers Mediaen_NZ
dc.subjectScience & Technologyen_NZ
dc.subjectLife Sciences & Biomedicineen_NZ
dc.subjectMicrobiologyen_NZ
dc.subjectAntarcticaen_NZ
dc.subjectdry valleysen_NZ
dc.subjecthyporheicen_NZ
dc.subjectoligotrophicen_NZ
dc.subjectsoil bacteriaen_NZ
dc.subjectsoil fungien_NZ
dc.subjectwater availabilityen_NZ
dc.subjectNEUTRAL THEORYen_NZ
dc.subjectSP-NOVen_NZ
dc.subjectPHYLOGENETIC STRUCTUREen_NZ
dc.subjectICE SHELFen_NZ
dc.subjectDIVERSITYen_NZ
dc.subjectECOLOGYen_NZ
dc.subjectECOSYSTEMSen_NZ
dc.subjectBACTERIAen_NZ
dc.subjectSEQUENCESen_NZ
dc.subjectRICHNESSen_NZ
dc.titleStochastic and deterministic effects of a moisture gradient on soil microbial communities in the McMurdo Dry Valleys of Antarcticaen_NZ
dc.typeJournal Article
dc.identifier.doi10.3389/fmicb.2018.02619en_NZ
dc.relation.isPartOfFrontiers in Microbiologyen_NZ
pubs.elements-id230346
pubs.publication-statusPublisheden_NZ
pubs.volume9en_NZ
uow.identifier.article-noARTN 2619


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