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Microbial Response to the MC-252 Oil and Corexit 9500 in the Gulf of Mexico

Journal Article · · Frontiers in Microbiology
 [1];  [2];  [2];  [2];  [3]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth Sciences Division. Dept. of Ecology; DOE/OSTI
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth Sciences Division. Dept. of Ecology
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Microbiology

The Deepwater Horizon spill released over 4.1 million barrels of crude oil into the Gulf of Mexico. In an effort to mitigate large oil slicks, the dispersant Corexit 9500 was sprayed onto surface slicks and injected directly at the wellhead at water depth of 1,500 m. Several research groups were involved in investigating the fate of the MC-252 oil using newly advanced molecular tools to elucidate microbial interactions with oil, gases, and dispersant. Microbial community analysis by different research groups revealed that hydrocarbon degrading bacteria belonging to Oceanospirillales, Colwellia, Cycloclasticus, Rhodobacterales, Pseudoalteromonas, and methylotrophs were found enriched in the contaminated water column. Presented here is a comprehensive overview of the ecogenomics of microbial degradation of MC-252 oil and gases in the water column and shorelines. We also present some insight into the fate of the dispersant Corexit 9500 that was added to aid in oil dispersion process. Our results show the dispersant was not toxic to the indigenous microbes at concentrations added, and different bacterial species isolated in the aftermath of the spill were able to degrade the various components of Corexit 9500 that included hydrocarbons, glycols, and dioctyl sulfosuccinate

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1628072
Journal Information:
Frontiers in Microbiology, Journal Name: Frontiers in Microbiology Vol. 3; ISSN 1664-302X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (26)

Bacterial community shift in the coastal Gulf of Mexico salt-marsh sediment microcosm in vitro following exposure to the Mississippi Canyon Block 252 oil (MC252) journal July 2014
The Variable Influence of Dispersant on Degradation of Oil Hydrocarbons in Subarctic Deep-Sea Sediments at Low Temperatures (0–5 °C) journal May 2017
Rapid Response of Eastern Mediterranean Deep Sea Microbial Communities to Oil journal July 2017
Draft Genome Sequences for Oil-Degrading Bacterial Strains from Beach Sands Impacted by the Deepwater Horizon Oil Spill journal December 2013
Biodegradation of Dispersed Oil in Arctic Seawater at -1°C journal January 2014
Regime Shift in Sandy Beach Microbial Communities following Deepwater Horizon Oil Spill Remediation Efforts journal July 2014
The polycyclic aromatic hydrocarbon degradation potential of Gulf of Mexico native coastal microbial communities after the Deepwater Horizon oil spill journal May 2014
Microbial transformation of the Deepwater Horizon oil spill—past, present, and future perspectives journal November 2014
Natural Sunlight Shapes Crude Oil-Degrading Bacterial Communities in Northern Gulf of Mexico Surface Waters journal December 2015
A Retrospective Review of Microbiological Methods Applied in Studies Following the Deepwater Horizon Oil Spill journal March 2018
Oil Hydrocarbon Degradation by Caspian Sea Microbial Communities journal May 2019
Ecogenomics of Deep-Ocean Microbial Bathytypes book March 2017
Indigenous oil-degrading bacteria in crude oil-contaminated seawater of the Yellow sea, China journal May 2014
The impact of the Deepwater Horizon blowout on historic shipwreck-associated sediment microbiomes in the northern Gulf of Mexico journal June 2018
Fallout plume of submerged oil from Deepwater Horizon journal October 2014
Chemical dispersants can suppress the activity of natural oil-degrading microorganisms journal November 2015
Ecological response of nitrification to oil spills and its impact on the nitrogen cycle: Ecological response of nitrification to oil spills journal October 2018
Baseline characterization of aerobic hydrocarbon degrading microbial communities in deep‐sea sediments of the Great Australian Bight, Australia journal March 2019
Bacterial Community Response to Petroleum Hydrocarbon Amendments in Freshwater, Marine, and Hypersaline Water-Containing Microcosms journal July 2013
Hydrocarbon-Degrading Bacteria Exhibit a Species-Specific Response to Dispersed Oil while Moderating Ecotoxicity journal November 2015
Corexit 9500 Enhances Oil Biodegradation and Changes Active Bacterial Community Structure of Oil-Enriched Microcosms journal March 2017
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