Influence of geogenic factors on microbial communities in metallogenic Australian soils

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dc.contributor.authorReith, F.
dc.contributor.authorBrugger, J.
dc.contributor.authorZammit, C.
dc.contributor.authorGregg, A.
dc.contributor.authorGoldfarb, K.
dc.contributor.authorAndersen, G.
dc.contributor.authorDeSantis, T.
dc.contributor.authorPiceno, Y.
dc.contributor.authorBrodie, E.
dc.contributor.authorLu, Z.
dc.contributor.authorHe, Z.
dc.contributor.authorZhou, J.
dc.contributor.authorWakelin, S.
dc.date.issued2012
dc.description.abstractLinks between microbial community assemblages and geogenic factors were assessed in 187 soil samples collected from four metal-rich provinces across Australia. Field-fresh soils and soils incubated with soluble Au(III) complexes were analysed using three-domain multiplex-terminal restriction fragment length polymorphism, and phylogenetic (PhyloChip) and functional (GeoChip) microarrays. Geogenic factors of soils were determined using lithological-, geomorphological- and soil-mapping combined with analyses of 51 geochemical parameters. Microbial communities differed significantly between landforms, soil horizons, lithologies and also with the occurrence of underlying Au deposits. The strongest responses to these factors, and to amendment with soluble Au(III) complexes, was observed in bacterial communities. PhyloChip analyses revealed a greater abundance and diversity of Alphaproteobacteria (especially Sphingomonas spp.), and Firmicutes (Bacillus spp.) in Au-containing and Au(III)-amended soils. Analyses of potential function (GeoChip) revealed higher abundances of metal-resistance genes in metal-rich soils. For example, genes that hybridised with metal-resistance genes copA, chrA and czcA of a prevalent aurophillic bacterium, Cupriavidus metallidurans CH34, occurred only in auriferous soils. These data help establish key links between geogenic factors and the phylogeny and function within soil microbial communities. In particular, the landform, which is a crucial factor in determining soil geochemistry, strongly affected microbial community structures.
dc.description.statementofresponsibilityFrank Reith, Joel Brugger, Carla M Zammit, Adrienne L Gregg, Katherine C Goldfarb, Gary L Andersen, Todd Z DeSantis, Yvette M Piceno, Eoin L Brodie, Zhenmei Lu, Zhili He, Jizhong Zhou and Steven A Wakelin
dc.identifier.citationThe ISME Journal: multidisciplinary journal of microbial ecology, 2012; 6(11):2107-2118
dc.identifier.doi10.1038/ismej.2012.48
dc.identifier.issn1751-7362
dc.identifier.issn1751-7370
dc.identifier.urihttp://hdl.handle.net/2440/74508
dc.language.isoen
dc.publisherNature Publishing Group
dc.relation.granthttp://purl.org/au-research/grants/arc/LP100200212
dc.rights© 2012 International Society for Microbial Ecology All rights reserved 1751-7362/12
dc.source.urihttps://doi.org/10.1038/ismej.2012.48
dc.subjectsoil
dc.subjectlandform
dc.subjectbacteria
dc.subjectgold
dc.subjectmicroarray
dc.subjectAustralia
dc.titleInfluence of geogenic factors on microbial communities in metallogenic Australian soils
dc.typeJournal article
pubs.publication-statusPublished

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