A 700-year macrophyte productivity record inferred from isotopes of macrophyte remains and bulk carbonates in Lake Koucha, northeast Qinghai-Tibetan Plateau

ISL OpenIR > 青海盐湖研究所知识仓储

	A 700-year macrophyte productivity record inferred from isotopes of macrophyte remains and bulk carbonates in Lake Koucha, northeast Qinghai-Tibetan Plateau
	Li, Xiangzhong 1; Liu, Weiguo 1,2; Zhou, Xin 3; Xu, Liming4 ; Cheng, Peng 1
	2017-02-12
发表期刊	QUATERNARY INTERNATIONAL
卷号	430 页码:32-40
关键词	Macrophyte Remains Carbon Isotope Productivity Temperature Lake Koucha Tibetan Plateau
摘要	The isotopic composition of total organic carbon (TOC) in lakes has been widely used to interpret paleoclimatic changes and the depositional environments of lake sediments. However, the main factors that affect the carbon isotopes of TOC may vary in different lake sediment records, limiting the ability of organic carbon isotopes to explain biogeochemical and environmental changes, especially in lakes with a large number of aquatic plants. In this study, the delta C-13 values of macrophyte remains and bulk carbonate in a sedimentary core from Lake Koucha were investigated to evaluate their paleoenvironmental implications. We found that the bulk carbonate was dominated by authigenic carbonates formed in the lake and that their delta O-18 and delta C-13 values can be used to reconstruct environmental changes in the Lake Koucha area. The macrophyte productivity derived from the carbon isotopic offset between the macrophyte remains and the bulk carbonate (epsilon(remains-BC)) in the Lake Koucha area agree well with total solar irradiance (TSI) records inferred from Delta Be-10 and temperature records based on tree rings from the Qinghai-Tibetan Plateau. Although the distribution of macrophytes is related to water depth according past studies and our observations in the field, our findings suggest that changes in macrophyte productivity may be primarily driven by temperature changes in the Lake Koucha area. (C) 2015 Elsevier Ltd and INQUA. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6202
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China 2.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian 710049, Peoples R China 3.Univ Sci & Technol China, Inst Polar Environm, Sch Earth & Space Sci, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiangzhong,Liu, Weiguo,Zhou, Xin,et al. A 700-year macrophyte productivity record inferred from isotopes of macrophyte remains and bulk carbonates in Lake Koucha, northeast Qinghai-Tibetan Plateau[J]. QUATERNARY INTERNATIONAL,2017,430:32-40.
APA	Li, Xiangzhong,Liu, Weiguo,Zhou, Xin,Xu, Liming,&Cheng, Peng.(2017).A 700-year macrophyte productivity record inferred from isotopes of macrophyte remains and bulk carbonates in Lake Koucha, northeast Qinghai-Tibetan Plateau.QUATERNARY INTERNATIONAL,430,32-40.
MLA	Li, Xiangzhong,et al."A 700-year macrophyte productivity record inferred from isotopes of macrophyte remains and bulk carbonates in Lake Koucha, northeast Qinghai-Tibetan Plateau".QUATERNARY INTERNATIONAL 430(2017):32-40.