By Vivian Kuo
(CNN) -- A new study finds oil spilled into the Gulf of Mexico from a ruptured BP well degraded at a rate that was "much faster than anticipated," thanks to the interaction of a newly-found and unclassified species of microbes with the oil particles.
Berkeley Lab's Earth Sciences Division and the Energy Biosciences Institute examined a dispersed oil plume that was formed at a depth of between 3,600 and 4,000 feet and extended some 10 miles out from the wellhead.
"Our findings show that the influx of oil profoundly altered the microbial community by significantly stimulating deep-sea psychrophilic (cold-temperature) gamma-proteobacteria that are closely related to known petroleum-degrading microbes," said Terry Hazen, a microbial ecologist and principal investigator on the study.
The cold-temperature bacteria "appears to be one of the major mechanisms behind the rapid decline of the deepwater dispersed oil plume that has been observed," Hazen said.
