Namib Desert dune/interdune transects exhibit habitat-specific edaphic bacterial communities

dc.contributor.authorRonca, Sandra
dc.contributor.authorRamond, Jean-Baptiste
dc.contributor.authorJones, Brian E.
dc.contributor.authorSeely, Mary
dc.contributor.authorCowan, Don A.
dc.contributor.emaildon.cowan@up.ac.zaen_ZA
dc.date.accessioned2015-12-03T07:38:07Z
dc.date.available2015-12-03T07:38:07Z
dc.date.issued2015-09-04
dc.description.abstractThe sand dunes and inter-dune zones of the hyper-arid central Namib Desert represent heterogeneous soil habitats. As little is known about their indigenous edaphic bacterial communities, we aimed to evaluate their diversity and factors of assembly and hypothesized that soil physicochemistry gradients would strongly shape dune/interdune communities. We sampled a total of 125 samples from 5 parallel dune/interdune transects and characterized 21 physico-chemical edaphic parameters coupled with 16S rRNA gene bacterial community fingerprinting using T-RFLP and 454 pyrosequencing. Multivariate analyses of T-RFLP data showed significantly different bacterial communities, related to physico-chemical gradients, in four distinct dune habitats: the dune top, slope, base and interdune zones. Pyrosequencing of 16S rRNA gene amplicon sets showed that each dune zone presented a unique phylogenetic profile, suggesting a high degree of environmental selection. The combined results strongly infer that habitat filtering is an important factor shaping Namib Desert dune bacterial communities, with habitat stability, soil texture and mineral and nutrient contents being the main environmental drivers of bacterial community structures.en_ZA
dc.description.librarianam2015en_ZA
dc.description.sponsorshipThe University of Pretoria Genomics Research Institute and the National Research Foundation (NRF) of South Africa.en_ZA
dc.description.urihttp://www.frontiersin.orgen_ZA
dc.identifier.citationRonca S, Ramond J-B, Jones BE, Seely M and Cowan DA (2015) Namib Desert dune/interdune transects exhibit habitat-specific edaphic bacterial communities. Front. Microbiol. 6:845. DOI: 10.3389/fmicb.2015.00845.en_ZA
dc.identifier.issn1664-302X
dc.identifier.other10.3389/fmicb.2015.00845
dc.identifier.urihttp://hdl.handle.net/2263/51033
dc.language.isoenen_ZA
dc.publisherFrontiers Research Foundationen_ZA
dc.rights© 2015 Ronca, Ramond, Jones, Seely and Cowan. This is an open- access article distributed under the terms of the Creative Commons Attribution License (CCBY).en_ZA
dc.subjectDeterministic assemblyen_ZA
dc.subjectOpen soilen_ZA
dc.subjectHabitat filtrationen_ZA
dc.subjectDune transectsen_ZA
dc.subjectEnvironmental gradienten_ZA
dc.subjectArid ecosystemsen_ZA
dc.titleNamib Desert dune/interdune transects exhibit habitat-specific edaphic bacterial communitiesen_ZA
dc.typeArticleen_ZA

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