IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Linking sedimentary total organic carbon to (210)pb(ex) chronology from Changshou Lake in the Three Gorges Reservoir Region, China
Anjum, Raheel1,2,3; Gao, Jinzhang1; Tang, Qiang1; He, Xiubin1; Zhang, Xinbao1; Long, Yi1; Shi, Zhonglin1; Wang, Mingfeng1,2
Corresponding AuthorXiubin He
2017
Source PublicationCHEMOSPHERE
ISSN0045-6535
EISSN1879-1298
Volume174Pages:243-252
SubtypeArticle
AbstractThe 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.
KeywordLake Sediment Toc Rainfall Erosivity Algal Scavenging Pb-210 Dating Changshou Lake
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.chemosphere.2017.01.060
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordUPPER YANGTZE-RIVER ; GEOCHEMICAL RECORD ; ENVIRONMENTAL-CHANGES ; ACCUMULATION RATES ; NORTHERN POLAND ; PARTICLE-SIZE ; PB-210 ; CS-137 ; CATCHMENT ; REDISTRIBUTION
Language英语
Quartile2区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000397076000027
Funding OrganizationKey Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Science(41571278) ; National Natural Science Foundation of China(41571278) ; Abdul Wali Khan University Mardan, Pakistan ; Higher Education Commission (HEC) Government of Pakistan
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18617
Collection山地表生过程与生态调控重点实验室
Affiliation1.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
Recommended Citation
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.
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