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

文献类型：期刊论文

作者Jiang, Jiawei1; Meng, Bowen1; Liu, Hu2; Wang, Huanye2; Kolpakova, Marina3; Krivonogov, Sergey3,4; Song, Mu1; Zhou, Aifeng5; Liu, Weiguo2,6; Liu, Zhonghui1
刊名CHEMICAL GEOLOGY
出版日期2021-03-30
卷号565页码:9
ISSN号0009-2541
关键词P-aq Organic carbon isotope Submerged plants Lake level Mid-latitude Asia
DOI10.1016/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
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.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
3.Inst Geol & Mineral SB RAS, Novosibirsk 630090, Russia
4.Novosibirsk State Univ, Novosibirsk 630090, Russia
5.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, 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.

入库方式： OAI收割

来源：地球环境研究所

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