Postglacial floral and climate changes in southeastern China recorded by distributions of n-alkan-2-ones in the Dahu sediment-peat sequence

doi:10.1016/j.palaeo.2019.109448

	Postglacial floral and climate changes in southeastern China recorded by distributions of n-alkan-2-ones in the Dahu sediment-peat sequence
	Chen, Lin 4; Zhou, Weijian 2; Zhang, Yiming 4; Zheng, Yanhong 3; Huang, Xianyu 1
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2020-01-15
卷号	538 页码:8
关键词	Lipid Paleohydrology Paleovegetation Ketone Quaternary
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2019.109448
通讯作者	Huang, Xianyu(xyhuang@cug.edu.cn)
英文摘要	Long-chain n-alkane-2-ones occur widely in lacustrine and peat depositional settings; however, their paleobotanical and paleoclimate implications are less understood, compared with their n-alkyl counterparts (n-alkanes, n-fatty acids). In this study, we have performed a molecular stratigraphic investigation of changes in the plant contributions and depositional conditions using n-alkan-2-ones in the Dahu lacustrine-peat sequence spanning the last 17 kyr. A series of n-alkan-2-ones ranging from C-23 to C-33 with a maximum at C-29 appears to be contributed by microbial oxidation of both n-alkanes and n-alkanoic acids. The values of the average chain length (ACL) and the ratios of mid-to long-chained n-alkan-2-ones display a trend comparable with the abundance of trees relative to herbs and ferns. In addition, the carbon predominance index (CPI) of n-alkan-2-ones varied in pace with lithology/paleoenvironment, with higher values seen in peat deposits. The alternating layers represent a succession of shallow lakes and peatlands that filled the depositional basin in response to paleoclimate changes between wetter and less wet conditions. The succession of paleohydrologic conditions is responsible for the variation of ketone CPI values in this peat-sediment sequence.
资助项目	National Natural Science Foundation of China[41830319] ; National Natural Science Foundation of China[41877317] ; National Natural Science Foundation of China[41572325] ; fundamental research funds for the central universities[CUGCJ1703] ; fundamental research funds for the central universities[CUGQY1902]
WOS关键词	LOESS-PALEOSOL SEQUENCES ; N-ALKANE DISTRIBUTIONS ; HOLOCENE CLIMATE ; SOUTHERN CHINA ; ORGANIC-MATTER ; ALTAI MOUNTAINS ; VEGETATION ; BIOMARKERS ; RECONSTRUCTION ; POLLEN
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000508751800012
资助机构	National Natural Science Foundation of China ; fundamental research funds for the central universities
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/12782]
专题	地球环境研究所_加速器质谱中心
通讯作者	Huang, Xianyu
作者单位	1.China Univ Geosci, Sch Geog & Informat Engn, Hubei Key Lab Crit Zone Evolut, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 4.China Univ Geosci, Sch Earth Sci, Hubei Key Lab Crit Zone Evolut, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Chen, Lin,Zhou, Weijian,Zhang, Yiming,et al. Postglacial floral and climate changes in southeastern China recorded by distributions of n-alkan-2-ones in the Dahu sediment-peat sequence[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,538:8.
APA	Chen, Lin,Zhou, Weijian,Zhang, Yiming,Zheng, Yanhong,&Huang, Xianyu.(2020).Postglacial floral and climate changes in southeastern China recorded by distributions of n-alkan-2-ones in the Dahu sediment-peat sequence.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,538,8.
MLA	Chen, Lin,et al."Postglacial floral and climate changes in southeastern China recorded by distributions of n-alkan-2-ones in the Dahu sediment-peat sequence".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 538(2020):8.