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dc.contributor.authorLebre, Pedro H.en_NZ
dc.contributor.authorBottos, Ericen_NZ
dc.contributor.authorMakhalanyane, Thulani P.en_NZ
dc.contributor.authorHogg, Ian D.en_NZ
dc.contributor.authorCowan, Don A.en_NZ
dc.date.accessioned2022-09-12T09:03:12Z
dc.date.available2022-09-12T09:03:12Z
dc.date.issued2021en_NZ
dc.identifier.issn0168-6496en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/15163
dc.description.abstractHypolithic microbial communities (hypolithons) are complex assemblages of phototrophic and heterotrophic organisms associated with the ventral surfaces of translucent minerals embedded in soil surfaces. Past studies on the assembly, structure and function of hypolithic communities have tended to use composite samples (i.e. bulked hypolithic biomass) with the underlying assumption that samples collected from within a ‘homogeneous’ locality are phylogenetically homogeneous. In this study, we question this assumption by analysing the prokaryote phylogenetic diversity of multiple individual hypolithons: i.e. asking the seemingly simple question of ‘Are all hypolithons the same’? Using 16S rRNA gene-based phylogenetic analysis of hypolithons recovered for a localized moraine region in the Taylor Valley, McMurdo Dry Valleys, Antarctica, we demonstrate that these communities are heterogeneous at very small spatial scales (<5 m). Using null models of phylogenetic turnover, we showed that this heterogeneity between hypolithons is probably due to stochastic effects such as dispersal limitations, which is entirely consistent with the physically isolated nature of the hypolithic communities (‘islands in the sand’) and the almost complete absence of a liquid continuum as a mode of microbial transport between communities.en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherOxford University Press (OUP)en_NZ
dc.relation.urihttps://academic.oup.com/femsec/article-abstract/97/1/fiaa216/5928546?redirectedFrom=fulltexten_NZ
dc.rights© The Author(s) 2020. Published by Oxford University Press on behalf of FEMS.
dc.subjecthypolithonen_NZ
dc.subjectsmall-scale heterogeneityen_NZ
dc.subjectphylogenetic turnoveren_NZ
dc.subjectdispersal limitationen_NZ
dc.subjectfunctional variabilityen_NZ
dc.subjectcore communityen_NZ
dc.titleIslands in the sand: are all hypolithic microbial communities the same?en_NZ
dc.typeJournal Article
dc.identifier.doi10.1093/femsec/fiaa216en_NZ
dc.relation.isPartOfFEMS Microbiology Ecologyen_NZ
pubs.elements-id265538
pubs.issue1en_NZ
pubs.volume97en_NZ
dc.identifier.eissn1574-6941en_NZ


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