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Molecular screening of microbial communities for candidate indicators of multiple metal impacts in marine sediments from northern Australia

Cornall, Alyssa M., Rose, Alea M., Streten-Joyce, Claire, McGuinness, Keith A., Parry, David L. and Gibb, Karen S. (2015). Molecular screening of microbial communities for candidate indicators of multiple metal impacts in marine sediments from northern Australia<br />. Environmental Toxicology and Chemistry,9999(9999):1-17.

Document type: Journal Article
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ARC Grant No. LP0776402
Title Molecular screening of microbial communities for candidate indicators of multiple metal impacts in marine sediments from northern Australia
Author Cornall, Alyssa M.
Rose, Alea M.
Streten-Joyce, Claire
McGuinness, Keith A.
Parry, David L.
Gibb, Karen S.
Journal Name Environmental Toxicology and Chemistry
Publication Date 2015
Volume Number 9999
Issue Number 9999
eISSN 1552-8618
Start Page 1
End Page 17
Place of Publication United States of America
Publisher John Wiley & Sons, Inc.
Language English
Field of Research 300800 Environmental Sciences
Abstract Coastal sediments accumulate metals from anthropogenic sources and as a consequence industry is required to monitor sediment health. The total concentration of a metal does not necessarily reflect its potential toxicity or biological impact, so biological assessment tools are useful for monitoring. Rapid biological assessment tools sensitive enough to detect relatively small increases in metal concentrations would provide early warning of future ecosystem impact. The authors investigated in situ populations of Archaea and Bacteria as potential tools for rapid biological assessment in sediment at 4 northern Australian coastal locations over 2 yr, in both wet and dry seasons. The 1 M HCl-extractable concentrations of metals in sediment were measured, and Archaeal and Bacterial community profiles were obtained by next-generation sequencing of sediment deoxyribonucleic acid (DNA). Species response curves were used to identify several taxonomic groups with potential as biological indicators of metal impact. Spatial variation, sediment grain size, water depth, and dissolved oxygen also correlated with microbial population shifts. Seasonal variation was less important than geographic location. Metal-challenge culture trials supported the identification of metal-resistant and -sensitive taxa. In situ Archaea and Bacteria are potentially sensitive indicators for changes in bioavailable concentrations of metals; however, the complexity of the system suggests it is important to identify metal-specific functional genes that may be informed by these sequencing surveys, and thus provide a useful addition to identity-based assays.
Keywords Sediment quality
Biomonitoring
Metals
Bioavailability
Benthic ecology
DOI http://dx.doi.org/10.1002/etc.3205   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
Open access False
 
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Created: Fri, 15 Jan 2016, 11:31:09 CST by Karen Gibb