Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms
Human activities in the Antarctic have resulted in hydrocarbon contamination of these fragile polar soils. Bioremediation is one of the options for remediation of these sites. However, little is known about anaerobic hydrocarbon degradation in polar soils and the influence of bioremediation practice...
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American Chemical Society
2006
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Online Access: | https://doi.org/10.1021/es051818t http://www.ncbi.nlm.nih.gov/pubmed/16570629 http://ecite.utas.edu.au/35974 |
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ftunivtasecite:oai:ecite.utas.edu.au:35974 2023-05-15T14:03:55+02:00 Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms Powell, S Ferguson, SH Snape, I Siciliano, SD 2006 application/pdf https://doi.org/10.1021/es051818t http://www.ncbi.nlm.nih.gov/pubmed/16570629 http://ecite.utas.edu.au/35974 en eng American Chemical Society http://ecite.utas.edu.au/35974/1/Powell UID35974.pdf http://dx.doi.org/10.1021/es051818t Powell, S and Ferguson, SH and Snape, I and Siciliano, SD, Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms, Environmental Science & Technology, 40, (6) pp. 2011-2017. ISSN 0013-936X (2006) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/16570629 http://ecite.utas.edu.au/35974 Biological Sciences Microbiology Microbial Ecology Refereed Article PeerReviewed 2006 ftunivtasecite https://doi.org/10.1021/es051818t 2019-12-13T21:14:21Z Human activities in the Antarctic have resulted in hydrocarbon contamination of these fragile polar soils. Bioremediation is one of the options for remediation of these sites. However, little is known about anaerobic hydrocarbon degradation in polar soils and the influence of bioremediation practices on these processes. Using a field trial at Old Casey Station, Antarctica, we assessed the influence of fertilization on the anaerobic degradation of a 20-year old fuel spill. Fertilization increased hydrocarbon degradation in both anaerobic and aerobic soils when compared to controls, but was of most benefit for anaerobic soils where evaporation was negligible. This increased biodegradation in the anaerobic soils corresponded with a shift in the denitrifier community composition and an increased abundance of denitrifiers and benzoyl-CoA reductase. A microcosm study using toluene and hexadecane confirmed the degradative capacity within these soils under anaerobic conditions. It was observed that fertilized anaerobic soil degraded more of this hydrocarbon spike when incubated anaerobically than when incubated aerobically. We conclude that denitrifiers are actively involved in hydrocarbon degradation in Antarctic soils and that fertilization is an effective means of stimulating their activity. Further, when communities stimulated to degrade hydrocarbons under anaerobic conditions are exposed to oxygen, hydrocarbon degradation is suppressed. The commonly accepted belief that remediation of polar soils requires aeration needs to be reevaluated in light of this new data. Article in Journal/Newspaper Antarc* Antarctic Antarctica eCite UTAS (University of Tasmania) Antarctic Casey Station ENVELOPE(110.528,110.528,-66.282,-66.282) The Antarctic Environmental Science & Technology 40 6 2011 2017 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Microbiology Microbial Ecology |
spellingShingle |
Biological Sciences Microbiology Microbial Ecology Powell, S Ferguson, SH Snape, I Siciliano, SD Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms |
topic_facet |
Biological Sciences Microbiology Microbial Ecology |
description |
Human activities in the Antarctic have resulted in hydrocarbon contamination of these fragile polar soils. Bioremediation is one of the options for remediation of these sites. However, little is known about anaerobic hydrocarbon degradation in polar soils and the influence of bioremediation practices on these processes. Using a field trial at Old Casey Station, Antarctica, we assessed the influence of fertilization on the anaerobic degradation of a 20-year old fuel spill. Fertilization increased hydrocarbon degradation in both anaerobic and aerobic soils when compared to controls, but was of most benefit for anaerobic soils where evaporation was negligible. This increased biodegradation in the anaerobic soils corresponded with a shift in the denitrifier community composition and an increased abundance of denitrifiers and benzoyl-CoA reductase. A microcosm study using toluene and hexadecane confirmed the degradative capacity within these soils under anaerobic conditions. It was observed that fertilized anaerobic soil degraded more of this hydrocarbon spike when incubated anaerobically than when incubated aerobically. We conclude that denitrifiers are actively involved in hydrocarbon degradation in Antarctic soils and that fertilization is an effective means of stimulating their activity. Further, when communities stimulated to degrade hydrocarbons under anaerobic conditions are exposed to oxygen, hydrocarbon degradation is suppressed. The commonly accepted belief that remediation of polar soils requires aeration needs to be reevaluated in light of this new data. |
format |
Article in Journal/Newspaper |
author |
Powell, S Ferguson, SH Snape, I Siciliano, SD |
author_facet |
Powell, S Ferguson, SH Snape, I Siciliano, SD |
author_sort |
Powell, S |
title |
Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms |
title_short |
Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms |
title_full |
Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms |
title_fullStr |
Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms |
title_full_unstemmed |
Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms |
title_sort |
fertilization stimulates anaerobic fuel degradation of antarctic soils by denitrifying microorganisms |
publisher |
American Chemical Society |
publishDate |
2006 |
url |
https://doi.org/10.1021/es051818t http://www.ncbi.nlm.nih.gov/pubmed/16570629 http://ecite.utas.edu.au/35974 |
long_lat |
ENVELOPE(110.528,110.528,-66.282,-66.282) |
geographic |
Antarctic Casey Station The Antarctic |
geographic_facet |
Antarctic Casey Station The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://ecite.utas.edu.au/35974/1/Powell UID35974.pdf http://dx.doi.org/10.1021/es051818t Powell, S and Ferguson, SH and Snape, I and Siciliano, SD, Fertilization Stimulates Anaerobic Fuel Degradation of Antarctic Soils by Denitrifying Microorganisms, Environmental Science & Technology, 40, (6) pp. 2011-2017. ISSN 0013-936X (2006) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/16570629 http://ecite.utas.edu.au/35974 |
op_doi |
https://doi.org/10.1021/es051818t |
container_title |
Environmental Science & Technology |
container_volume |
40 |
container_issue |
6 |
container_start_page |
2011 |
op_container_end_page |
2017 |
_version_ |
1766274790487752704 |