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dc.contributor.authorKleindienst, Sara  Concept link
dc.contributor.authorSeidel, Michael  Concept link
dc.contributor.authorZiervogel, Kai  Concept link
dc.contributor.authorGrim, Sharon L.  Concept link
dc.contributor.authorLoftis, Kathy  Concept link
dc.contributor.authorHarrison, Sarah  Concept link
dc.contributor.authorMalkin, Sairah Y.  Concept link
dc.contributor.authorPerkins, Matthew J.  Concept link
dc.contributor.authorField, Jennifer  Concept link
dc.contributor.authorSogin, Mitchell L.  Concept link
dc.contributor.authorDittmar, Thorsten  Concept link
dc.contributor.authorPassow, Uta  Concept link
dc.contributor.authorMedeiros, Patricia M.  Concept link
dc.contributor.authorJoye, Samantha B.  Concept link
dc.date.accessioned2015-11-24T15:33:36Z
dc.date.available2015-11-24T15:33:36Z
dc.date.issued2015-09
dc.identifier.urihttps://hdl.handle.net/1912/7649
dc.descriptionAuthor Posting. © The Author(s), 2015. This is the author's version of the work. It is posted here by permission of National Academy of Sciences for personal use, not for redistribution. The definitive version was published in Proceedings of the National Academy of Sciences of the United States of America 112 (2015): 14900-14905, doi:10.1073/pnas.1507380112.en_US
dc.description.abstractDuring the Deepwater Horizon oil well blowout in the Gulf of Mexico, the application of 7 million liters of chemical dispersants aimed to stimulate microbial crude oil degradation by increasing the bioavailability of oil compounds. However, the effects of dispersants on oil biodegradation rates are debated. In laboratory experiments, we simulated environmental conditions comparable in the hydrocarbon-rich, 1100m deep, plume that formed during the Deepwater Horizon discharge. The presence of dispersant significantly altered the microbial community composition through selection for potential dispersant-degrading Colwellia, which also bloomed in situ in Gulf deep-waters during the discharge. In contrast, oil addition lacking dispersant stimulated growth of natural hydrocarbon-degrading Marinobacter. Dispersants did not enhance heterotrophic microbial activity or hydrocarbon oxidation rates. Extrapolating this comprehensive data set to real world scenarios questions whether dispersants stimulate microbial oil degradation in deep ocean waters and instead highlights that dispersants can exert a negative effect on microbial hydrocarbon degradation rates.en_US
dc.description.sponsorshipThis research was supported by a grant from BP/the Gulf of Mexico Research Initiative to support the "Ecosystem Impacts of Oil and Gas Inputs to the Gulf (ECOGIG)” consortium. PMM also acknowledges funding from the National Science Foundation (OCE-1057683).en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1073/pnas.1507380112
dc.subjectOceanic microbial dynamicsen_US
dc.subjectHydrocarbon cyclingen_US
dc.subjectChemical dispersantsen_US
dc.subjectOil spillsen_US
dc.titleChemical dispersants can suppress the activity of natural oil-degrading microorganismsen_US
dc.typePreprinten_US


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