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. 1990 Jun;56(6):1565–1570. doi: 10.1128/aem.56.6.1565-1570.1990

Hydrocarbon Mineralization in Sediments and Plasmid Incidence in Sediment Bacteria from the Campeche Bank

Joseph G Leahy 1, Charles C Somerville 1, Kelly A Cunningham 1, Grammenos A Adamantiades 1, Jeffrey J Byrd 1, Rita R Colwell 1,*
PMCID: PMC184472  PMID: 16348204

Abstract

Rates of degradation of radiolabeled hydrocarbons and incidence of bacterial plasmid DNA were investigated in sediment samples collected from the Campeche Bank, Gulf of Mexico, site of an offshore oil field containing several petroleum platforms. Overall rates of mineralization of [14C]hexadecane and [14C]phenanthrene measured for sediments were negligible; <1% of the substrate was converted to CO2 in all cases. Low mineralization rates are ascribed to nutrient limitations and to lack of adaptation by microbial communities to hydrocarbon contaminants. Plasmid frequency data for sediment bacteria similarly showed no correlation with proximity to the oil field, but, instead, showed correlation with water column depth at each sampling site. Significant differences between sites were observed for proportion of isolates carrying single or multiple plasmids and mean number of plasmids per isolate, each of which increased as a function of depth.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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