Water depth control on n-alkane distribution and organic carbon isotope in mid-latitude Asian lakes

doi:10.1016/j.chemgeo.2021.120070

	Water depth control on n-alkane distribution and organic carbon isotope in mid-latitude Asian lakes
	Jiang, Jiawei 1; Meng, Bowen 1; Liu, Hu 6; Wang, Huanye 6; Kolpakova, Marina 2; Krivonogov, Sergey 2,3; Song, Mu 1; Zhou, Aifeng 4; Liu, Weiguo 5,6; Liu, Zhonghui 1
刊名	CHEMICAL GEOLOGY
	2021-03-30
卷号	565 页码:9
关键词	P-aq Organic carbon isotope Submerged plants Lake level Mid-latitude Asia
ISSN号	0009-2541
DOI	10.1016/j.chemgeo.2021.120070
通讯作者	Liu, Weiguo(liuwg@loess.llqg.ac.cn) ; Liu, Zhonghui(zhliu@hku.hk)
英文摘要	The relative proportion of mid-chain to long chain n-alkane homologues and isotopic compositions of total organic carbon (P-aq and delta C-13(org)) have been proposed as potential lake-level proxies since such features mainly come from submerged aquatic plants living within an optimum range of lake water depth. With limited dataset available, the applicability of both indices and their sensitivity to lake water depth changes across a broad geographic extent need further investigation. Here we report P-aq and delta C-13(org) values in surface sediments collected from 55 lakes in mid-latitude Asia. We have found an arched relationship between P-aq index and water depth, with high Paq values occurring at the depth of similar to 1-10 m, while sediments from shallower and deeper water lakes have relatively low P-aq values. delta C-13(org) variation resembles an arched pattern with depth in freshwater and brackish lakes, with relatively high delta C-13(org) values also corresponding to the depth of similar to 1-10 m, but substantially high delta C-13(org) values in hypersaline environments (salinity > similar to 100,000 mg/L) obscure the arched delta C-13(org)-depth relationship. We suggest that both indices respond to the structure of aquatic plant community, especially the biomass of submerged plants. Our results confirm that P-aq and delta C-13(org) can be used to infer lake-level changes in mid-latitude Asia, but other influencing factors have to be considered before applying the two proxies to downcore reconstructions, and combined utilization of the P-aq and delta C-13(org) indicators could improve the reliability of paleohydrological reconstructions.
资助项目	Chinese Academy of Sciences[XDB40000000] ; Hong Kong Research Grants Council[17325516] ; RSF[17-77-10086] ; RFBR[19-05-00403 a] ; RFBR[19-29-05085] ; RFBR[18-35-00072 mol_a] ; RFBR[18-33-20038 mol_a] ; Institute of Geology and Mineralogy SB RAS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000627419100004
资助机构	Chinese Academy of Sciences ; Hong Kong Research Grants Council ; RSF ; RFBR ; Institute of Geology and Mineralogy SB RAS
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/16155]
专题	地球环境研究所_加速器质谱中心
通讯作者	Liu, Weiguo; Liu, Zhonghui
作者单位	1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 2.Inst Geol & Mineral SB RAS, Novosibirsk 630090, Russia 3.Novosibirsk State Univ, Novosibirsk 630090, Russia 4.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Jiawei,Meng, Bowen,Liu, Hu,et al. Water depth control on n-alkane distribution and organic carbon isotope in mid-latitude Asian lakes[J]. CHEMICAL GEOLOGY,2021,565:9.
APA	Jiang, Jiawei.,Meng, Bowen.,Liu, Hu.,Wang, Huanye.,Kolpakova, Marina.,...&Liu, Zhonghui.(2021).Water depth control on n-alkane distribution and organic carbon isotope in mid-latitude Asian lakes.CHEMICAL GEOLOGY,565,9.
MLA	Jiang, Jiawei,et al."Water depth control on n-alkane distribution and organic carbon isotope in mid-latitude Asian lakes".CHEMICAL GEOLOGY 565(2021):9.