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Natural attenuation of legacy hydrocarbon spills in pristine soils is feasible despite difficult environmental conditions in the monsoon tropics

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Gleeson, Deirdre B., Martin, Belinda C., Lardner, Tim, Ball, Andrew S., Grice, Kliti, Holman, Alex I., Trolove, Alastair, Manix, Megan, Tibbett, Mark, Bending, G. D., Hilton, Sally and Ryan, Megan H. (2021) Natural attenuation of legacy hydrocarbon spills in pristine soils is feasible despite difficult environmental conditions in the monsoon tropics. Science of The Total Environment, 799 . 149335. doi:10.1016/j.scitotenv.2021.149335 ISSN 0048-9697.

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Official URL: http://dx.doi.org/10.1016/j.scitotenv.2021.149335

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Abstract

The Kimberley region of Western Australia is a National Heritage listed region that is internationally recognised for its environmental and cultural significance. However, petroleum spills have been reported at a number of sites across the region, representing an environmental concern. The region is also characterised as having low soil nutrients, high temperatures and monsoonal rain - all of which may limit the potential for natural biodegradation of petroleum. Therefore, this work evaluated the effect of legacy petroleum hydrocarbons on the indigenous soil microbial community (across the domains Archaea, Bacteria and Fungi) at three sites in the Kimberley region. At each site, soil cores were removed from contaminated and control areas and analysed for total petroleum hydrocarbons, soil nutrients, pH and microbial community profiling (using16S rRNA and ITS sequencing on the Illumina MiSeq Platform). The presence of petroleum hydrocarbons decreased microbial diversity across all kingdoms, altered the structure of microbial communities and increased the abundance of putative hydrocarbon degraders (e.g. Mycobacterium, Acremonium, Penicillium, Bjerkandera and Candida). Microbial community shifts from contaminated soils were also associated with an increase in soil nutrients (notably Colwell P and S). Our study highlights the long-term effect of legacy hydrocarbon spills on soil microbial communities and their diversity in remote, infertile monsoonal soils, but also highlights the potential for natural attenuation to occur in these environments.

Item Type: Journal Article
Subjects: Q Science > QR Microbiology
T Technology > TD Environmental technology. Sanitary engineering
T Technology > TN Mining engineering. Metallurgy
T Technology > TP Chemical technology
Divisions: Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- )
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Chemical spills -- Australia, Bioremediation, Petroleum -- Australia, Soil microbial ecology -- Effect of pollution on , Pollution -- Australia
Journal or Publication Title: Science of The Total Environment
Publisher: Elsevier Science BV
ISSN: 0048-9697
Official Date: 10 December 2021
Dates:
DateEvent
10 December 2021Published
30 July 2021Available
25 July 2021Accepted
Volume: 799
Article Number: 149335
DOI: 10.1016/j.scitotenv.2021.149335
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 13 September 2021
Date of first compliant Open Access: 30 July 2022
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
LP110201130Australian Research Councilhttp://dx.doi.org/10.13039/501100000923
NE/S010270/1[NERC] Natural Environment Research Councilhttp://dx.doi.org/10.13039/501100000270

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