Journal article

Distribution of iron- and sulfate-reducing bacteria across a coastal acid sulfate soil (CASS) environment: implications for passive bioremediation by tidal inundation

Yu-Chen Ling, Richard Bush, Kliti Grice, Svenja Tulipani, Lyndon Berwick, John W Moreau



Coastal acid sulfate soils (CASS) constitute a serious and global environmental problem. Oxidation of iron sulfide minerals exposed to air generates sulfuric acid with consequently negative impacts on coastal and estuarine ecosystems. Tidal inundation represents one current treatment strategy for CASS, with the aim of neutralizing acidity by triggering microbial iron- and sulfate-reduction and inducing the precipitation of iron-sulfides. Although well-known functional guilds of bacteria drive these processes, their distributions within CASS environments, as well as their relationships to tidal cycling and the availability of nutrients and electron acceptors, are poorly understood. These fact..

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Awarded by Australian Research Council

Awarded by CRC CARE Project

Funding Acknowledgements

The authors acknowledge funding from the Australian Research Council (LP110100732) and CRC CARE Project - A National Demonstration Site for Acid Sulfate Soil Remediation. We thank Andrew Rose (Southern Cross GeoScience, Southern Cross University) and Andre Mu (School of Earth Sciences and Department of Microbiology and Immunology, University of Melbourne) for helpful advice and Steve Wilbraham (Department of Science, Information Technology, Innovation and the Arts, Queensland Government, Australia) for logistical and fieldwork support. Geoff Chidlow (Curtin University) is thanked for technical support with GC-MS analyses, and Lorenz Schwark (Kiel University) is thanked for assistance with selected compound identifications.