Inocula from oil-contaminated Colgate Creek and oil-free Eastern Bay sediment produced similar growth on a South Louisiana crude oil The Colgate Creek inoculum was found to contain a wider variety of bacterial genera and to produce greater degradation of South Louisiana crude oil than the Eastern Bay sediment inocula. The resin fraction of the crude oil increased during growth and weathering. All of the hydrocarbon classes of the crude oil were susceptible to degradation by microorganisms present in the Colgate Creek inoculum, but not by those in the Eastern Bay samples.

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