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Branched and isoprenoid tetraether (BIT) index traces water content along two marsh-soil transects surrounding Lake Qinghai: Implications for paleo-humidity variation
Wang, HY (Wang, Huanye)[ 1,2 ]; Liu, WG (Liu, Weiguo)[ 1,3 ]; Zhang, CLL (Zhang, Chuanlun L.)[ 4,5 ]; Liu, ZH (Liu, Zhonghui)[ 6 ]; He, YX (He, Yuxin)[ 6 ]
2013-06-30
发表期刊ORGANIC GEOCHEMISTRY
卷号59页码:75-81
文章类型期刊论文
摘要

The 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 chemolithoauto-trophic 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.

DOI10.1016/j.orggeochem.2013.03.011
收录类别SCI ; EI
语种英语
引用统计
被引频次:33[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10005
专题加速器质谱中心
通讯作者Liu, WG (Liu, Weiguo)[ 1,3 ]
作者单位1.State Key Laboratory of Loess and Quaternary Geology, IEE, CAS, Xi’an 710075, China;
2.Graduate School of Chinese Academy of Sciences, Beijing 100049, China;
3.School of Human Settlement and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
4.State Key Laboratory of Marine Geology, School of Ocean of Earth Sciences, Tongji University, Shanghai 200092, China;
5.Department of Marine Sciences, The University of Georgia, Athens, GA 30602, USA;
6.Department of Earth Sciences, The University of Hong Kong, Hong Kong, China
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Wang, HY ,Liu, WG ,Zhang, CLL ,et al. Branched and isoprenoid tetraether (BIT) index traces water content along two marsh-soil transects surrounding Lake Qinghai: Implications for paleo-humidity variation[J]. ORGANIC GEOCHEMISTRY,2013,59:75-81.
APA Wang, HY ,Liu, WG ,Zhang, CLL ,Liu, ZH ,&He, YX .(2013).Branched and isoprenoid tetraether (BIT) index traces water content along two marsh-soil transects surrounding Lake Qinghai: Implications for paleo-humidity variation.ORGANIC GEOCHEMISTRY,59,75-81.
MLA Wang, HY ,et al."Branched and isoprenoid tetraether (BIT) index traces water content along two marsh-soil transects surrounding Lake Qinghai: Implications for paleo-humidity variation".ORGANIC GEOCHEMISTRY 59(2013):75-81.
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