U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights

Hope for Reestablishing Microbial Populations in the Gulf of Mexico
Published: August 01, 2013
Posted: February 12, 2014

Comparing the expressed genetic information from microbial communities before and after the 2010 Deepwater Horizon spill indicated that while the overall population diversity has changed, some microbes were unaffected. (Image courtesy of Green Fire Productions, Flickr CC BY 2.0)

Researchers used metatranscriptomic analyses to compare the microbial populations in the Gulf of Mexico before and after the Deepwater Horizon oil spill to learn more about the impact of   petroleum being spilled into the waters. Though the oil spill reduced the diversity of the microbial communities in the Gulf of Mexico, some microbial populations remain unchanged suggesting that they may be important in reestablishing the original microbial community.
One of the first studies published in the aftermath of the Deepwater Horizon oil spill involved the Department of Energy’s Joint Genome Institute (DOE JGI) researchers and confirmed that microbial communities did play a role in dispersing the hydrocarbons from the waters. A second study released in 2012 tracked the populations of several microbial species in the Gulf of Mexico as they dominated in the waters at various time points to remove different fractions of the oil.

DOE JGI associated researchers recently carried out a new study of the microbial populations in the Gulf of Mexico, this time focusing on the expressed genetic information of an ecosystem, its metatranscriptomes. They examined species in the bathypelagic zone at depths of 1,000 to 4,000 meters underwater where no sunlight penetrates. The analysis of roughly 66 million transcripts sequenced for the study attributes 40% of the reads to just six genomes from Gammaproteobacteria known to be capable of breaking down methane and petroleum. The findings confirm that the diversity of microbes and their functional roles in the waters have decreased since the oil spill. However, the team also found that some microbial populations did not appear to be affected by the events that took place three years ago, as their numbers remain similar both before and after 2010.

“Despite the enormous bloom of hydrocarbon-degrading Gammaproteobacteria that increased bacterial cell counts by two orders of magnitude, members of the natural microbial community persisted at their pre-bloom activity levels and may be important in reestablishing the original microbial community,” the researchers concluded.

Reference: Rivers A.R., et al. 2013. “Transcriptional Response of Bathypelagic Marine Bacterioplankton to the Deepwater Horizon Oil Spill,” The ISME Journal 7, 2315-29. DOI:10.1038/ismej.2013.129. (Reference link)

Contact: Dan Drell, SC-23.2, (301) 903-4742
Topic Areas:

  • Research Area: Genomic Analysis and Systems Biology
  • Research Area: Microbes and Communities
  • Research Area: DOE Joint Genome Institute (JGI)

Division: SC-23.2 Biological Systems Science Division, BER


BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Aug 24, 2019
New Approach for Studying How Microbes Influence Their Environment
A diverse group of scientists suggests a common framework and targeting of known microbial processes [more...]

Aug 08, 2019
Nutrient-Hungry Peatland Microbes Reduce Carbon Loss Under Warmer Conditions
Enzyme production in peatlands reduces carbon lost to respiration under future high temperatures. [more...]

Aug 05, 2019
Amazon Forest Response to CO2 Fertilization Dependent on Plant Phosphorus Acquisition
AmazonFACE Model Intercomparison. The Science Plant growth is dependent on the availabi [more...]

Jul 29, 2019
A Slippery Slope: Soil Carbon Destabilization
Carbon gain or loss depends on the balance between competing biological, chemical, and physical reac [more...]

Jul 15, 2019
Field Evaluation of Gas Analyzers for Measuring Ecosystem Fluxes
How gas analyzer type and correction method impact measured fluxes. The Science A side- [more...]

List all highlights (possible long download time)