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Article: Branched and isoprenoid tetraether (BIT) index traces water content along two marsh-soil transects surrounding Lake Qinghai: Implications for paleo-humidity variation

TitleBranched and isoprenoid tetraether (BIT) index traces water content along two marsh-soil transects surrounding Lake Qinghai: Implications for paleo-humidity variation
Authors
Issue Date2013
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/orggeochem
Citation
Organic Geochemistry, 2013, v. 59, p. 75-81 How to Cite?
AbstractThe BIT index represents the relative abundances of branched glycerol dialkyl glycerol tetraethers (bGDGTs) and the isoprenoid GDGT, crenarchaeol. While bGDGTs are produced mainly by soil (anaerobic) bacteria, crenarchaeol is known to be a biomarker for aerobic ammonia oxidation by chemolithoautotrophic Thaumarchaeota, particularly in the open ocean or lakes. Thus, the index in marine and lacustrine settings has been widely used as a proxy for soil input. Here, we have investigated GDGT distribution along two transects extending from the lake shore marsh to upland soils on the NE Qinghai-Tibetan plateau. The results show that soil water content (SWC) correlates positively with concentration of bGDGTs and negatively with concentration of crenarchaeol; consequently, there is a significant positive correlation between SWC and the BIT index. Our study highlights a new potential application of BIT as a humidity proxy in loess/soil and peat deposits. © 2013 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/184318
ISSN
2015 Impact Factor: 2.99
2015 SCImago Journal Rankings: 1.567
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, Hen_US
dc.contributor.authorLiu, Wen_US
dc.contributor.authorZhang, CLen_US
dc.contributor.authorLiu, Zen_US
dc.contributor.authorHe, Yen_US
dc.date.accessioned2013-07-10T06:24:07Z-
dc.date.available2013-07-10T06:24:07Z-
dc.date.issued2013en_US
dc.identifier.citationOrganic Geochemistry, 2013, v. 59, p. 75-81en_US
dc.identifier.issn0146-6380en_US
dc.identifier.urihttp://hdl.handle.net/10722/184318-
dc.description.abstractThe BIT index represents the relative abundances of branched glycerol dialkyl glycerol tetraethers (bGDGTs) and the isoprenoid GDGT, crenarchaeol. While bGDGTs are produced mainly by soil (anaerobic) bacteria, crenarchaeol is known to be a biomarker for aerobic ammonia oxidation by chemolithoautotrophic Thaumarchaeota, particularly in the open ocean or lakes. Thus, the index in marine and lacustrine settings has been widely used as a proxy for soil input. Here, we have investigated GDGT distribution along two transects extending from the lake shore marsh to upland soils on the NE Qinghai-Tibetan plateau. The results show that soil water content (SWC) correlates positively with concentration of bGDGTs and negatively with concentration of crenarchaeol; consequently, there is a significant positive correlation between SWC and the BIT index. Our study highlights a new potential application of BIT as a humidity proxy in loess/soil and peat deposits. © 2013 Elsevier Ltd.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/orggeochemen_US
dc.relation.ispartofOrganic Geochemistryen_US
dc.titleBranched and isoprenoid tetraether (BIT) index traces water content along two marsh-soil transects surrounding Lake Qinghai: Implications for paleo-humidity variationen_US
dc.typeArticleen_US
dc.identifier.emailLiu, Z: zhliu@hku.hken_US
dc.identifier.authorityLiu, Z=rp00750en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.orggeochem.2013.03.011en_US
dc.identifier.scopuseid_2-s2.0-84877114687en_US
dc.identifier.hkuros219538-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84877114687&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume59en_US
dc.identifier.spage75en_US
dc.identifier.epage81en_US
dc.identifier.isiWOS:000319448800007-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridWang, H=49964977800en_US
dc.identifier.scopusauthoridLiu, W=55723526300en_US
dc.identifier.scopusauthoridZhang, CL=7405489900en_US
dc.identifier.scopusauthoridLiu, Z=16177844800en_US
dc.identifier.scopusauthoridHe, Y=55499015600en_US

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