Linking sedimentary total organic carbon to (210)pb(ex) chronology from Changshou Lake in the Three Gorges Reservoir Region, China
文献类型：期刊论文
| 作者 | Anjum, Raheel1,2,3; Gao, Jinzhang1 ; Tang, Qiang1; He, Xiubin1; Zhang, Xinbao1; Long, Yi1; Shi, Zhonglin1; Wang, Mingfeng1,2
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| 刊名 | CHEMOSPHERE
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| 出版日期 | 2017-05-01 |
| 卷号 | 174页码:243-252 |
| 关键词 | Lake sediment TOC Rainfall erosivity Algal scavenging Pb-210 dating Changshou Lake |
| ISSN号 | 0045-6535 |
| 通讯作者 | Xiubin He |
| 英文摘要 | The influences of total organic carbon (TOC) and total nitrogen (TN) on Lead-210 (Pb-210) dating have recently been of increasing concern in lacustrine research. Sediment core from Changshou Lake in the Longxi catchment was investigated for influence of TOC on Pb-210 dating. Lead-210 excess ((210)Pbex), Cesium-137 (Cs-137) activities, TOC, TN, and particle size were measured. We proposed a dating index based on 1(37)Cs chronology and particle size distribution of the lake sediment profile and rainfall erosivities calculated from Longxi catchment metrological records. Increasing trends in TOC and TN were specifically caused by commercial cage fish farming after 1989. The statistically significant correlation between (210)Pbex activity, TOC (0.61, p = 0.04) and TN (0.51, p = 0.04), respectively explained post-1989 21 Pb scavenging. The (210)Pbex activity was closely related with coupled peaks of TOC and TN from mass depth 5-10 g cm(-2). Higher TOC/TN ratio (8.33) indicated submerged macrophytes and native aquatic algal growth as main source of carbon from enhanced primary productivity because of massive fertilizer use and coherent climate warming. The study supported key hypothesis on vital role of fertilizer usage and algal derived TOC in controlling sedimentary (210)Pbex activity at Changshou Lake sediment. 137Cs profile and erosive events as time markers provided reliable and consistent sedimentation rate of (1.6 cm y(-1)). ziopbex activity decayed exponentially after peak at mass depth 5.68 g cm(-2). Therefore, violation of Pb-210 dating primary assumptions made it inappropriate for sediment dating at Changshou Lake. TOC content must be considered while using Pb-210 as dating tool for lake sediment profiles. (C) 2017 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Environmental Sciences |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | UPPER YANGTZE-RIVER ; GEOCHEMICAL RECORD ; ENVIRONMENTAL-CHANGES ; ACCUMULATION RATES ; NORTHERN POLAND ; PARTICLE-SIZE ; PB-210 ; CS-137 ; CATCHMENT ; REDISTRIBUTION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000397076000027 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/18617]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Processes & Ecol Regulat, 9,Block 4,South Renmin Rd, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Abdul Wall Khan Univ, Mardan, Pakistan |
| 推荐引用方式 GB/T 7714 | Anjum, Raheel,Gao, Jinzhang,Tang, Qiang,et al. Linking sedimentary total organic carbon to (210)pb(ex) chronology from Changshou Lake in the Three Gorges Reservoir Region, China[J]. CHEMOSPHERE,2017,174:243-252. |
| APA | Anjum, Raheel.,Gao, Jinzhang.,Tang, Qiang.,He, Xiubin.,Zhang, Xinbao.,...&Wang, Mingfeng.(2017).Linking sedimentary total organic carbon to (210)pb(ex) chronology from Changshou Lake in the Three Gorges Reservoir Region, China.CHEMOSPHERE,174,243-252. |
| MLA | Anjum, Raheel,et al."Linking sedimentary total organic carbon to (210)pb(ex) chronology from Changshou Lake in the Three Gorges Reservoir Region, China".CHEMOSPHERE 174(2017):243-252. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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