| 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
| |
| 第一作者 | Li, Xiangzhong |
| 2017-02-12 | |
| 发表期刊 | QUATERNARY INTERNATIONAL
 |
| ISSN | 1040-6182 |
| 卷号 | 430页码:32-40 |
| 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. |
| DOI | 10.1016/j.quaint.2015.11.053 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.isl.ac.cn/handle/363002/34570 |
| 专题 | 支撑部门 |
| 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. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| A 700-year macrophyt（1531KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论