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Carbon and nitrogen signatures of sedimentary organic matter from Dali Lake in Inner Mongolia: Implications for Holocene hydrological and ecological variations in the East Asian summer monsoon margin

文献类型：期刊论文

作者Fan, Jiawei1,2; Xiao, Jule1,3; Wen, Ruilin1; Zhang, Shengrui1,2; Wang, Xu1; Cui, Linlin1; Yamagata, Hideki4
刊名QUATERNARY INTERNATIONAL
出版日期2017-09-15
卷号452页码:65-78
关键词Dali Lake Sedimentary organic matter Hydrology Ecology East Asian summer monsoon Holocene
ISSN号1040-6182
DOI10.1016/j.quaint.2016.09.050
文献子类Article
英文摘要Environmental changes in the East Asian summer monsoon (EASM) margin have an important impact on the global climate system. This study presents the results of high-resolution analyses of TOC/TN (C/N) ratio, delta C-13 and delta N-15 of sedimentary organic matter extracted from a sediment core from Dali Lake, Inner Mongolia, in order to monitor Holocene hydrological and ecological variations in the EASM margin. Concurrent increases in the values of these proxies are generally interpreted to reflect intensified surface runoff and vegetation development in the lake catchment, elevated lake levels and enhanced lake productivity; however, changes in delta C-13 and delta N-15 may also result from within-lake processes due to changes in lake level. These data indicate that Dali Lake experienced gradual rises in water level and primary productivity from 11,500 to 9800 cal yr BP, as documented by increases in TOC and TN concentrations, C/N ratios and delta C-13 and delta N-15 values. From 9800 to 7700 cal yr BP, high, stable TOC and TN concentrations and C/N ratios together with low delta C-13 and delta N-15 values suggest a status of high stands and high productivity for the lake and a development of terrestrial vegetation in the catchment. Between 7700 and 5900 cal yr BP, TOC and TN were fluctuating at higher concentrations and C/N maintained high ratios, while delta C-13 increased in its value and delta N-15 remained at low values, denoting a further rise in lake level and a notable improvement of aquatic and terrestrial ecosystems. Around 5900 cal yr BP, TOC and TN concentrations, C/N ratios and delta C-13 values decreased abruptly, while delta N-15 value increased rapidly, implying dramatic drops in lake level and water temperature and drastic declines of aquatic and terrestrial ecosystems. Subsequently all geochemical proxies increased in their values until 4850 cal yr BP, indicating a gradual hydrological and ecological recovery. From 4850 to 750 cal yr BP, decreasing trends of TOC and TN concentrations and C/N ratios and increasing trends of delta C-13 and delta N-15 values denote a general decline in the hydrological and ecological conditions. The last 750 cal yrs witnessed the pattern of hydrological and ecological changes occurring from 5900 to 4850 cal yr BP. We suggest that hydrological and ecological changes in the EASM margin during the Holocene were closely related to the combined effects of regional precipitation and temperature which were ultimately controlled by the Northern Hemisphere summer insolation, the boundary conditions and the physical environment of ocean current. (C) 2016 Elsevier Ltd and INQUA. All rights reserved.
WOS关键词NORTH-ATLANTIC CLIMATE ; BLUE-GREEN-ALGAE ; ISOTOPE FRACTIONATION ; TIBETAN PLATEAU ; ENVIRONMENTAL-CHANGES ; SURFACE-TEMPERATURE ; GEOCHEMICAL PROXIES ; MULTIPROXY APPROACH ; HIGH-RESOLUTION ; AQUATIC PLANTS
WOS研究方向Physical Geography ; Geology
语种英语
WOS记录号WOS:000409352600007
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Ministry of Science and Technology of China(2010CB833400) ; National Natural Science Foundation of China(41130101 ; 41372188) ; Ministry of Science and Technology of China(2010CB833400) ; National Natural Science Foundation of China(41130101 ; 41372188) ; Ministry of Science and Technology of China(2010CB833400) ; National Natural Science Foundation of China(41130101 ; 41372188) ; Ministry of Science and Technology of China(2010CB833400) ; National Natural Science Foundation of China(41130101 ; 41372188)
源URL[http://ir.iggcas.ac.cn/handle/132A11/61909]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Fan, Jiawei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
4.Paleo Labo Co Ltd, Saitama 3350016, Japan
推荐引用方式
GB/T 7714		 Fan, Jiawei,Xiao, Jule,Wen, Ruilin,et al. Carbon and nitrogen signatures of sedimentary organic matter from Dali Lake in Inner Mongolia: Implications for Holocene hydrological and ecological variations in the East Asian summer monsoon margin[J]. QUATERNARY INTERNATIONAL,2017,452:65-78.
APA Fan, Jiawei.,Xiao, Jule.,Wen, Ruilin.,Zhang, Shengrui.,Wang, Xu.,...&Yamagata, Hideki.(2017).Carbon and nitrogen signatures of sedimentary organic matter from Dali Lake in Inner Mongolia: Implications for Holocene hydrological and ecological variations in the East Asian summer monsoon margin.QUATERNARY INTERNATIONAL,452,65-78.
MLA Fan, Jiawei,et al."Carbon and nitrogen signatures of sedimentary organic matter from Dali Lake in Inner Mongolia: Implications for Holocene hydrological and ecological variations in the East Asian summer monsoon margin".QUATERNARY INTERNATIONAL 452(2017):65-78.

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来源：地质与地球物理研究所

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