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HCl-Extractable metal profiles correlate with bacteria population shifts in metal-impacted anoxic coastal sediment from the wet/dry tropics

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dc.contributor Australian Institute of Marine Science (AIMS) en
dc.contributor.author Cornall, Alyssa (M) en
dc.contributor.author Beyer, Stephen (S) en
dc.contributor.author Rose, Alea (A) en
dc.contributor.author Streten-Joyce, Claire (C) en
dc.contributor.author McGuinness, Keith (K) en
dc.contributor.author Parry, David (D) en
dc.contributor.author Gibb, Karen (K) en
dc.date.accessioned 2013-02-28T06:57:42Z
dc.date.accessioned 2017-03-21T01:28:18Z
dc.date.accessioned 2019-07-08T02:27:10Z
dc.date.available 2013-02-28T06:57:42Z
dc.date.available 2017-03-21T01:28:18Z
dc.date.available 2019-07-08T02:27:10Z
dc.date.issued 2013-01-01 en
dc.identifier 9292 en
dc.identifier.citation Cornall M, Beyer S, Rose A, Streten-Joyce C, McGuinness K, Parry D and Gibb K (2013) HCl-Extractable metal profiles correlate with bacteria population shifts in metal-impacted anoxic coastal sediment from the wet/dry tropics. Geomicrobiology Journal. 30: 48-60. en
dc.identifier.uri http://epubs.aims.gov.au/11068/9292
dc.description.abstract Metal impacted, anoxic sediments from five sites at a coastal location in the wet/dry tropics of Australia were sampled during both wet and dry seasons. Metal concentrations in total sediment and porewater, and in potentially bioavailable and bioaccessible fractions, were measured. Pyrosequencing was used to sequence bacterial DNA extracted from the sediment, and the sequence data was used to generate community profiles at each sample site. Changes in bacterial populations between sites reflected changes in the concentrations of 7 metals/metalloids (Al, V, Mo, Ga, Zn, Cd, As), and best correlated with the HCl-extractable fraction of metals. Bacterial community structure was also related to physicochemical factors, such as redox potential and organic carbon. Despite a strong sulphide gradient across the transect, acid-volatile sulphide was not significantly correlated to bacterial community structure. We conclude that the bioaccessible fraction of metals to bacteria is partly comprised of particulates, and porewater alone is not a sufficient model for potential metal impact. en
dc.description.uri http://www.tandfonline.com/doi/full/10.1080/01490451.2011.653083
dc.language en en
dc.relation.ispartof Geomicrobiology Journal - pages: 30: 48-60 en
dc.title HCl-Extractable metal profiles correlate with bacteria population shifts in metal-impacted anoxic coastal sediment from the wet/dry tropics en
dc.type journal article en


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