November 1, 2021 Journal article Open Access

Synnøve Lofthus; Ingrid Bakke; Odd Gunnar Brakstad; Charles W. Greer

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    <subfield code="a">Abstract Oil spilled in the Arctic may drift into ice-covered areas and become trapped until the ice melts. To determine if exposure to oil during freezing may have a priming effect on degradation of the oil, weathered dispersed oil (2-3 mg/L) was frozen into solid ice for 200 days at -10 °C, then melted and incubated for 64 days at 4 °C. No degradation was measured in oil frozen into ice prior to melting. Both total amount of oil and target compounds were biotransformed by the microbial community from the melted ice. However, oil released from melted ice was degraded at a slower rate than oil incubated in fresh seawater at the same temperature (4 °C), and by a different microbial community. These data suggest negligible biodegradation of oil frozen in sea ice, while oil-degrading bacteria surviving in the ice may contribute to biodegradation when the ice melts.</subfield>
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    <subfield code="a">10.1016/j.marpolbul.2021.112823</subfield>
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    <subfield code="a">Biodegradation of weathered crude oil by microbial communities in solid and melted sea ice.</subfield>
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