气候变化领域集成服务门户(CCPortal): Assessing paleohydrologic controls on the hydrogen isotope compositions of leaf wax n-alkanes in Chinese peat deposits

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DOI	10.1016/j.palaeo.2018.12.017
	Assessing paleohydrologic controls on the hydrogen isotope compositions of leaf wax n-alkanes in Chinese peat deposits
	Huang X.; Meyers P.A.
发表日期	2019
ISSN	0031-0182
起始页码	354
结束页码	363
卷号	516
英文摘要	The high concentrations of lipid biomarkers in peat and the close relation between peatland development and hydrological conditions merit further assessment of the paleohydrological proxy potential of the 2H/1H ratio of leaf wax n-alkanes (δ2Halk) in peat deposits. In the context of the dynamics of the East Asian summer monsoon, detailed investigation of modern processes is an important way to improve our understanding of the controls on δ2Halk records from Chinese peat deposits. This review first synthesizes the results of investigations of modern processes in the Dajiuhu peatland of central China, complemented by results from other peatlands and nearby non-peatland sites, to evaluate how the 2H/1H ratio changes from source water to leaf water and then to lipids in leaf waxes and ultimately to peat deposits. The results reveal that the precipitation δ2H values and the peatland plant types are the two major factors that control the δ2Halk signals preserved in peat at Dajiuhu. Comparison of results from Holocene δ2Halk sequences from other Chinese peat deposits illustrates how peat δ2Halk values respond to paleoclimate changes on centennial to millennial timescales throughout the East Asian summer monsoon region. Finally, proposed incubations of peat-forming plants in controlled chambers that could assess the response of plant δ2Halk values to environmental stresses are described. As an example, responses of the compound-specific biomarker δ2H and δ13C values of Sphagnum, the dominant plant in the Dajiuhu peatland, could provide important information on the symbiotic relation between Sphagnum and microbes. It is expected that experiments such as these that combine the carbon and hydrogen isotope compositions of multiple lipids will yield important new insights into the responses of peatland ecosystems to climate changes. © 2018 Elsevier B.V.
英文关键词	Asian summer monsoon; Compound-specific hydrogen isotope; Lipid; Plant type; Precipitation isotope
语种	英语
scopus关键词	alkene; assessment method; carbon isotope; climate change; climate variation; concentration (composition); environmental stress; Holocene; hydrogen isotope; isotopic composition; lipid; moss; paleoclimate; paleohydrology; peat; peatland; plant; precipitation (climatology); summer; wax; China; Sphagnum
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151083
作者单位	Hubei Key Laboratory of Critical Zone Evolution, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; Department of Earth and Environmental Sciences, The University of Michigan, Ann Arbor, MI 48109-1005, United States
推荐引用方式 GB/T 7714	Huang X.,Meyers P.A.. Assessing paleohydrologic controls on the hydrogen isotope compositions of leaf wax n-alkanes in Chinese peat deposits[J],2019,516.
APA	Huang X.,&Meyers P.A..(2019).Assessing paleohydrologic controls on the hydrogen isotope compositions of leaf wax n-alkanes in Chinese peat deposits.Palaeogeography, Palaeoclimatology, Palaeoecology,516.
MLA	Huang X.,et al."Assessing paleohydrologic controls on the hydrogen isotope compositions of leaf wax n-alkanes in Chinese peat deposits".Palaeogeography, Palaeoclimatology, Palaeoecology 516(2019).