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Comparison of biogeochemical signals between a pingo-like feature and amud volcano in the Canadian Beaufort Sea

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dc.contributor.authorLee, DongHun-
dc.contributor.authorKim, Jung-Hyun-
dc.contributor.authorLee, Yung Mi-
dc.contributor.authorJin, Young Keun-
dc.contributor.authorPaull, Charles-
dc.contributor.authorShin, Kyung-Hoon-
dc.date.accessioned2021-08-26T08:12:16Z-
dc.date.available2021-08-26T08:12:16Z-
dc.date.issued2019-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/12645-
dc.description.abstractIn this study, we investigated microbial lipid biomarkers by analyzing two push cores recovered from distinct positive relief features which are located on the continental shelf (pingo-like feature (PLF), 107 m water depth) and slope (mud volcano (MV), 746 m water depth) in the Canadian Beaufort Sea. Their origins are thought to be related with fluid flow phenomena. 13CTOC values of the PLF were more 13C-depleted than those of the MV, indicating a higher contribution of anaerobic methane oxidation (AOM)-related biomass to the organic carbon pool at the PLF site. Furthermore, 34STS values were more depleted at the PLF site, resulting from the active AOM-related sulfate reduction. The PLF sediments contained 13C-depleted microbial lipid biomarkers consisting of irregular isoprenoids, isoprenoidal DGDs, non-isoprenoid DGDs, and C30 hopanoids. This suggests that both AOM and aerobic methane oxidation (MOx) occured at the PLF site where methane fluxes may be moderate. Moreover, higher ratios of sn-2-hydroxyarchaeol over archaeol (>2) and the presence of 13C-depleted saturated PMI analogues (PMI:3 to 5) indicate that ANME-2 and ANME-3 were involved in the assimilation of methane and/or methane-derived inorganic carbons. In contrast, these lipid biomarkers were scarce at the MV site where active eruptions were observed during the core acquisition, indicating that both AOM and MOx were neglegible at the time of the sampling at this site. Consequently, out study suggests that different methane fluxes were responsible for the AOM and MOx processes causing the different biogeochemial characteristics in the samples from the PLF and MV sites in the Canadian Beaufort Sea.en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.titleComparison of biogeochemical signals between a pingo-like feature and amud volcano in the Canadian Beaufort Seaen_US
dc.title.alternative캐나다 보퍼트해에서 pingo-like feature와 mud volcano에서의 생지화학적 특성 비교 연구en_US
dc.typeProceedingen_US
dc.identifier.bibliographicCitationLee, DongHun, et al. 2019. Comparison of biogeochemical signals between a pingo-like feature and amud volcano in the Canadian Beaufort Sea. EGU2019. Vienna. 2019.04.07~2019.04.12.-
dc.citation.conferenceDate2019.04.07~2019.04.12en_US
dc.citation.conferenceNameEGU2019en_US
dc.citation.conferencePlaceViennaen_US
dc.description.articleClassificationPro(초록)국외-
dc.subject.keywordCanadian Beaufort Seaen_US
dc.subject.keywordbiogeochemical signalsen_US
dc.subject.keywordmud volcanoen_US
dc.subject.keywordpingo-like featureen_US
dc.identifier.localId2019-0292-
Appears in Collections  
2019-2020, Investigation of submarine resource environment and seabed methane release in the Arctic (19-20) / Jin, Young Keun (PM19050)
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