Initial community and environment determine the response of bacterial communities to dispersant and oil contamination

TitleInitial community and environment determine the response of bacterial communities to dispersant and oil contamination
Publication TypeJournal Article
Year of Publication2015
AuthorsOrtmann AC, Lu YH
JournalMarine Pollution Bulletin
Volume90
Pagination106-114
Date PublishedJan 15
ISBN Number0025-326X
Accession NumberWOS:000348964000026
KeywordsDeepwater Horizon Oil Spill
AbstractBioremediation of seawater by natural bacterial communities is one potential response to coastal oil spills, but the success of the approach may vary, depending on geographical location, oil composition and the timing of spill. The short term response of coastal bacteria to dispersant, oil and dispersed oil was characterized using 16S rRNA gene tags in two mesocosm experiments conducted two months apart. Despite differences in the amount of oil-derived alkanes across the treatments and experiments, increases in the contributions of hydrocarbon degrading taxa and decreases in common estuarine bacteria were observed in response to dispersant and/or oil. Between the two experiments, the direction and rates of changes in particulate alkane concentrations differed, as did the magnitude of the bacterial response to oil and/or dispersant. Together, our data underscore large variability in bacterial responses to hydrocarbon pollutants, implying that bioremediation success varies with starting biological and environmental conditions. (C) 2014 Elsevier Ltd. All rights reserved.
DOI10.1016/j.marpolbul.2014.11.013