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A 700-year macrophyte productivity record inferred from isotopes of macrophyte remains and bulk carbonates in Lake Koucha, northeast Qinghai-Tibetan Plateau
Li, Xiangzhong1; Liu, Weiguo1,2; Zhou, Xin3; Xu, Liming4; Cheng, Peng1
2017-02-12
发表期刊QUATERNARY INTERNATIONAL
卷号430页码:32-40
文章类型Article
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.
关键词Macrophyte Remains Carbon Isotope Productivity Temperature Lake Koucha Tibetan Plateau
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]DISSOLVED INORGANIC CARBON ; BAYAN-HAR MOUNTAINS ; LACUSTRINE CARBONATES ; HYDROLOGICAL CHANGES ; TEMPERATURE-CHANGES ; STABLE-ISOTOPES ; ORGANIC-MATTER ; EARLY HOLOCENE ; TREE-RINGS ; ICE CORE
收录类别SCI
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000397933600005
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
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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.
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