Compound-specific delta D and its hydrological and environmental implication in the lakes on the Tibetan Plateau

doi:10.1007/s11430-017-9182-2

	Compound-specific delta D and its hydrological and environmental implication in the lakes on the Tibetan Plateau
	Liu, Weiguo 2,3; Liu, Hu 2,3; Yang, Hong 1; Cao, Yunning 2
刊名	SCIENCE CHINA-EARTH SCIENCES
	2018-06-01
卷号	61 期号:6 页码:765-777
关键词	N-alkane Hydrogen Isotope Composition Submerged Plant Algae Tibetan Plateau
DOI	10.1007/s11430-017-9182-2
文献子类	Article
英文摘要	The hydrogen isotopic composition (delta D) of n-alkanes in lacustrine sediments is widely used in palaeoenvironmental studies, but the heterogeneous origins and relative contributions of these lipids provide challenges for the interpretation of the increasing dataset as an environment and climatic proxy. We systematically investigated n-alkane delta D values from 51 submerged plants (39 Potamogeton, 1 Myriophyllum, and 11 Ruppia), 13 algae (5 Chara, 3 Cladophora, and 5 Spirogyra) and 20 terrestrial plants (10 grasses and 10 shrubs) in and around 15 lakes on the Tibetan Plateau. Our results demonstrate that delta D values of C-29 n-alkane are correlated significantly with the lake water delta D values both for algae (R (2)=0.85, p < 0.01, n=9) and submerged plants (R (2)=0.90, p < 0.01, n=25), indicating that delta D values of these algae and submerged plants reflect the delta D variation of lake water. We find that apparent hydrogen isotope fractionation factors between individual n-alkanes and water (epsilon (a/w)) are not constant among different algae and submerged plants, as well as in a single genus under different liminological conditions, indicating that the biosynthesis or environmental conditions (e.g. salinity) may affect their delta D values. The delta D values of submerged plant Ruppia in the Xiligou Lake (a closed lake) are significant enriched in D than those of terrestrial grasses around the lake (one-way ANOVA, p < 0.01), but the algae Chara in the Keluke Lake (an open lake) display similar delta D values with grasses around the lake (one-way ANOVA, p=0.826 > 0.05), suggesting that the n-alkane delta D values of the algae and submerged plants record the signal of D enrichment in lake water relative to precipitation only in closed lakes in arid and semi-arid area. For each algae and submerged plant sample, we find uniformed delta D values of different chain length n-alkanes, implying that, in combination with other proxies such as Paq and Average Chain Length, the offset between the delta D values of different chain length n-alkanes can help determine the source of sedimentary n-alkanes as well as inferring the hydrological characteristics of an ancient lake basin (open vs closed lake).
WOS关键词	HYDROGEN ISOTOPIC COMPOSITIONS ; WAX N-ALKANES ; RATIO MASS-SPECTROMETRY ; LACUSTRINE SEDIMENTS ; TERRESTRIAL PLANTS ; DONGGI CONA ; LEAF WAXES ; H-2/H-1 FRACTIONATION ; CONTINUOUS CULTURES ; EMILIANIA-HUXLEYI
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000434489400009
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5134]
专题	地球环境研究所_加速器质谱中心
作者单位	1.Bryant Univ, Dept Sci & Technol, Coll Arts & Sci, Lab Terr Environm, Smithfield, RI 02917 USA 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Weiguo,Liu, Hu,Yang, Hong,et al. Compound-specific delta D and its hydrological and environmental implication in the lakes on the Tibetan Plateau[J]. SCIENCE CHINA-EARTH SCIENCES,2018,61(6):765-777.
APA	Liu, Weiguo,Liu, Hu,Yang, Hong,&Cao, Yunning.(2018).Compound-specific delta D and its hydrological and environmental implication in the lakes on the Tibetan Plateau.SCIENCE CHINA-EARTH SCIENCES,61(6),765-777.
MLA	Liu, Weiguo,et al."Compound-specific delta D and its hydrological and environmental implication in the lakes on the Tibetan Plateau".SCIENCE CHINA-EARTH SCIENCES 61.6(2018):765-777.