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University of Tennessee professor's research shows Gulf of Mexico resilient after spill
Date:4/9/2013

The Gulf of Mexico may have a much greater natural ability to self-clean oil spills than previously believed, according to Terry Hazen, University of Tennessee-Oak Ridge National Laboratory Governor's Chair for Environmental Biotechnology.

The bioremediation expert presented his Deepwater Horizon disaster research findings at the 245th National Meeting and Exposition of the American Chemical Society (ACS), the world's largest scientific society.

Hazen conducted research following the 2010 Deepwater Horizon disaster, which is estimated to have spilled 210 million gallons of oil into the Gulf of Mexico. His research team used a powerful new approach for identifying microbes in the environment to discover previously unknown and naturally occurring bacteria that consume and break down crude oil.

"The Deepwater Horizon oil provided a new source of nutrients in the deepest waters," said Hazen. "With more food present in the water, there was a population explosion among those bacteria already adapted to using oil as a food source. It was surprising how fast they consumed the oil. In some locations, it took only one day for them to reduce a gallon of oil to a half gallon. In others, the half-life for a given quantity of spilled oil was six days."

This data suggests that a great potential for intrinsic bioremediation of oil plumes exists in the deep sea and other environs in the Gulf of Mexico. Oil-eating bacteria are natural inhabitants of the Gulf because of the constant supply of oil as food.

Hazen's team used a novel approach for identifying previously recognized kinds of oil-eating bacteria that contributed to the natural clean up of the Deepwater Horizon spill. Instead of growing the microbes in a laboratory, the team used "ecogenomics." This approach uses genetic and other analyses of the DNA, proteins and other footprints of bacteria to provide a more detailed picture of microbial life in the water.

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Contact: Whitney Heins
wheins@utk.edu
865-974-5460
University of Tennessee at Knoxville
Source:Eurekalert

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