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

doi:10.1016/j.quaint.2015.11.053

	A 700-year macrophyte productivity record inferred from isotopes of macrophyte remains and bulk carbonates in Lake Koucha, northeast Qinghai-Tibetan Plateau
	Li, Xiangzhong; Liu, Weiguo; Zhou, Xin; Xu, Liming; Cheng, Peng
刊名	QUATERNARY INTERNATIONAL
	2017-02-12
卷号	430 页码:32-40
ISSN号	1040-6182
DOI	10.1016/j.quaint.2015.11.053
英文摘要	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.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34570]
专题	青海盐湖研究所_管理部门
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.