DOI: 10.1016/j.watres.2018.10.066
Scopus记录号: 2-s2.0-85055965605
论文题名: In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice
作者: Vergeynst L. ; Christensen J.H. ; Kjeldsen K.U. ; Meire L. ; Boone W. ; Malmquist L.M.V. ; Rysgaard S.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 459
结束页码: 468
语种: 英语
英文关键词: Arctic
; Bacterial community
; Biodegradation
; Oil spill
; Photooxidation
; Sea ice
Scopus关键词: Aromatic compounds
; Biofilms
; Dissolution
; Lubricating oils
; Natural attenuation
; Oil spills
; Paraffins
; Photooxidation
; Polymerase chain reaction
; Risk management
; Sea ice
; Seawater
; Arctic
; Bacterial community
; Characteristic signature
; Microbial communities
; Petroleum compounds
; Polycyclic aromatic compounds
; Situ biodegradations
; Sub-zero temperatures
; Biodegradation
; adsorbent
; alkane
; petroleum
; polycyclic aromatic compound
; sea water
; bacterium
; biodegradation
; biofilm
; dissolution
; fjord
; ice cover
; microbial community
; natural attenuation
; oil spill
; petroleum
; photooxidation
; sea ice
; amplicon
; Arctic
; Article
; bacterial colonization
; bacterial gene
; biodegradation
; biofilm
; chemometric analysis
; controlled study
; dissolution
; ecosystem
; Gammaproteobacteria
; half life time
; mass fragmentography
; microbial community
; microbial diversity
; microbial population dynamics
; nonhuman
; oil spill
; Oleispira antarctica
; photooxidation
; polymerase chain reaction
; population abundance
; population density
; priority journal
; quantitative analysis
; sea ice
; temperature
; Arctic
; Arctic Ocean
; Greenland
; Greenland
; Nuuk
; Bacteria (microorganisms)
; Oleispira
; Oleispira antarctica
英文摘要: In pristine sea ice-covered Arctic waters the potential of natural attenuation of oil spills has yet to be uncovered, but increasing shipping and oil exploitation may bring along unprecedented risks of oil spills. We deployed adsorbents coated with thin oil films for up to 2.5 month in ice-covered seawater and sea ice in Godthaab Fjord, SW Greenland, to simulate and investigate in situ biodegradation and photooxidation of dispersed oil. GC-MS-based chemometric methods for oil fingerprinting were used to identify characteristic signatures for dissolution, biodegradation and photooxidation. In sub-zero temperature seawater, fast degradation of n-alkanes was observed with estimated half-life times of ∼7 days. PCR amplicon sequencing and qPCR quantification of bacterial genes showed that a biofilm with a diverse microbial community colonised the oil films, yet a population related to the psychrophilic hydrocarbonoclastic gammaproteobacterium Oleispira antarctica seemed to play a key role in n-alkane degradation. Although Oleispira populations were also present in sea ice, we found that biofilms in sea ice had 25 to 100 times lower bacterial densities than in seawater, which explained the non-detectable n-alkane degradation in sea ice. Fingerprinting revealed that photooxidation, but not biodegradation, transformed polycyclic aromatic compounds through 50 cm-thick sea ice and in the upper water column with removal rates up to ∼1% per day. Overall, our results showed a fast biodegradation of n-alkanes in sea ice-covered seawater, but suggested that oils spills will expose the Arctic ecosystem to bio-recalcitrant PACs over prolonged periods of time. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122190
Appears in Collections: 气候变化事实与影响
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作者单位: Arctic Research Centre, Aarhus University, Aarhus, Denmark; Section for Microbiology and Center for Geomicrobiology, Department of Bioscience, Aarhus University, Aarhus, Denmark; Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark; Greenland Climate Research Centre, Greenland Institute of Natural Resources, Nuuk, Greenland; Department of Estuarine and Delta Systems, Royal Netherlands Institute of Sea Research, Utrecht University, Yerseke, Netherlands; Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Recommended Citation:
Vergeynst L.,Christensen J.H.,Kjeldsen K.U.,et al. In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice[J]. Water Research,2019-01-01