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Petroleum hydrocarbon and microbial community structure successions in marine oil-related aggregates associated with diatoms relevant for Arctic conditions

TitlePetroleum hydrocarbon and microbial community structure successions in marine oil-related aggregates associated with diatoms relevant for Arctic conditions
Publication TypeJournal Article
Year of Publication2018
AuthorsNetzer R, Henry IA, Ribicic D, Wibberg D, Brönner U, Brakstad OG
JournalMarine Pollution Bulletin
Volume135
Pagination759–768
ISSN0025326X
KeywordsArctic, biodegradation, diatoms, Microbial communities, Oil-related aggregates, RC4289
Abstract

Oil-related aggregates (ORAs) may contribute to the fate of oil spilled o ff shore. However, our understanding about the impact of diatoms and associated bacteria involved in the formation of ORAs and the fate of oil compounds in these aggregates is still limited. We investigated these processes in microcosm experiments with de fi ned oil dispersions in seawater at 5 °C, employing the Arctic diatom Fragilariopsis cylindrus and its associated bacterial assemblage to promote ORA formation. Accumulation of oil compounds, as well as biodegradation of naphthalenes in ORAs and corresponding water phases, was enhanced in the presence of diatoms. Interestingly, the genus Nonlabens was predominating the bacterial communities in diatom-supplemented microcosms, while this genus was not abundant in other samples. This work elucidates the relevance of diatom biomass for the formation of ORAs, microbial community structures and biodegradation processes in chemically dispersed oil at low temperatures relevant for Arctic conditions

URLhttps://doi.org/10.1016/j.marpolbul.2018.07.074
DOI10.1016/j.marpolbul.2018.07.074