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Type: Journal article
Title: Bacterial communities associated with a mineral weathering profile at a sulphidic mine tailings dump in arid Western Australia
Author: Wakelin, S.
Anand, R.
Reith, F.
Gregg, A.
Noble, R.
Goldfarb, K.
Anderson, G.
DeSantis, T.
Piceno, Y.
Brodie, E.
Citation: FEMS Microbiology Ecology, 2012; 79(2):298-311
Publisher: Elsevier Science BV
Issue Date: 2012
ISSN: 0168-6496
Statement of
Steven A. Wakelin, Ravi R. Anand, Frank Reith, Adrienne L. Gregg, Ryan R.P. Noble, Kate C. Goldfarb, Gary L. Andersen, Todd Z. DeSantis, Yvette M. Piceno & Eoin L. Brodie
Abstract: We investigated bacterial community assemblages and functions down a hill slope contaminated by tailings from a volcanogenic massive sulphide mine in arid Western Australia. Weathering of waste rock, high in S and Fe, had resulted in a varying elemental dispersal down a face of the tailings hill. Bacterial community assemblage, characterised by PCR–DGGE fingerprinting, was significantly associated with electrical conductivity (E.C.) (ρ = 0.664; P < 0.01). Analysis of mobile salts showed that E.C. values were driven by ionic S, Zn, Cl and Al. The bacterial community assemblage was directly characterised across an E.C. gradient using an oligonucleotide microarray (PhyloChip). The dominant taxa at the site were Proteobacteria, Actinobacteria and Firmicutes; however, 37 phyla were detected. The most responsive taxa to variation in E.C. was Acidobacteria (negative correlation). Patterns of heterotrophic processes (Bio-Log analysis) were also best explained by variation in E.C. (ρ = 0.53;P < 0.01), showing a link between primary mineral weathering by lithotrophic bacteria and abiotic processes, and secondary biogeochemical processes by heterotrophic taxa. These data significantly broaden our knowledge of the bacteria present in metallomorphic ecosystems, establish that mobile phase elements are key drivers of community structure, and that primary biogeochemical cycling is directly influencing other geochemical interactions in the samples.
Keywords: PhyloChip; mineral weathering; PCR-DGGE
Rights: © 2011 Federation of European Microbiological Societies
RMID: 0020116077
DOI: 10.1111/j.1574-6941.2011.01215.x
Appears in Collections:Earth and Environmental Sciences publications
Environment Institute publications

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