Biotransformation of petroleum hydrocarbons and microbial communities in seawater with oil dispersions and copepod feces

TitleBiotransformation of petroleum hydrocarbons and microbial communities in seawater with oil dispersions and copepod feces
Publication TypeJournal Article
Year of Publication2015
AuthorsStordal IFladvad, Olsen AJohny, Jenssen BMunro, Netzer R, Altin D, Brakstad O G
JournalMarine Pollution Bulletin
Volume101
Pagination686-693
Date PublishedDec 30
ISBN Number0025-326X
Accession NumberWOS:000367107600026
KeywordsOil and Gas Degradition
AbstractTo determine biotransformation of components in crude oil dispersions in the presence of feces from marine copepods, dispersed oil was incubated alone, with the addition of clean or oil-containing feces. We hypothesized that the feces would contribute with nutrients to bacteria, and higher concentrations of oil-degrading bacteria, respectively. Presence of clean feces resulted in higher degradation of aromatic oil compounds, but lower degradation of n-alkanes. Presence of oil-containing feces resulted in higher degradation of n-alkanes. The effect of clean feces on aromatic compounds are suggested to be due to higher concentrations of nutrients in the seawater where aromatic degradation takes place, while the lower degradation of n-alkanes are suggested to be due to a preference by bacteria for feces over these compounds. Large aggregates were observed in oil dispersions with clean feces, which may cause sedimentation of un-weathered lipophilic oil compounds towards the seafloor if formed during oil spills. (C) 2015 Elsevier Ltd. All rights reserved.
DOI10.1016/j.marpolbul.2015.10.029