In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice
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 se...
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2019
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ftvliz:oai:oma.vliz.be:304431 2023-05-15T13:53:33+02:00 In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice Vergeynst, L. Christensen, J.H. Kjeldsen, K.U. Meire, L. Boone, W. Malmquist, L.M.V. Rysgaard, S. 2019 application/pdf https://www.vliz.be/imisdocs/publications/324832.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000452931600045 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.watres.2018.10.066 https://www.vliz.be/imisdocs/publications/324832.pdf info:eu-repo/semantics/openAccess %3Ci%3EWat.+Res.+148%3C%2Fi%3E%3A+459-468.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.watres.2018.10.066%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.watres.2018.10.066%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftvliz https://doi.org/10.1016/j.watres.2018.10.066 2022-05-01T11:13:45Z 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. Article in Journal/Newspaper Antarc* Antarctica Arctic Greenland Sea ice Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Arctic Greenland Water Research 148 459 468 |
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Open Polar |
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Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
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ftvliz |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Vergeynst, L. Christensen, J.H. Kjeldsen, K.U. Meire, L. Boone, W. Malmquist, L.M.V. Rysgaard, S. |
spellingShingle |
Vergeynst, L. Christensen, J.H. Kjeldsen, K.U. Meire, L. Boone, W. Malmquist, L.M.V. Rysgaard, S. In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice |
author_facet |
Vergeynst, L. Christensen, J.H. Kjeldsen, K.U. Meire, L. Boone, W. Malmquist, L.M.V. Rysgaard, S. |
author_sort |
Vergeynst, L. |
title |
In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice |
title_short |
In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice |
title_full |
In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice |
title_fullStr |
In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice |
title_full_unstemmed |
In situ biodegradation, photooxidation and dissolution of petroleum compounds in Arctic seawater and sea ice |
title_sort |
in situ biodegradation, photooxidation and dissolution of petroleum compounds in arctic seawater and sea ice |
publishDate |
2019 |
url |
https://www.vliz.be/imisdocs/publications/324832.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Antarc* Antarctica Arctic Greenland Sea ice |
genre_facet |
Antarc* Antarctica Arctic Greenland Sea ice |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000452931600045 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.watres.2018.10.066 https://www.vliz.be/imisdocs/publications/324832.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.watres.2018.10.066 |
container_title |
Water Research |
container_volume |
148 |
container_start_page |
459 |
op_container_end_page |
468 |
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1766258732549799936 |