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Geochemical characteristics and fluxes of organic carbon in a human-disturbed mountainous river (the Luodingjiang River) of the Zhujiang (Pearl River), China

文献类型：期刊论文

作者Zhang, Shurong1; Lu, X. X.1; Sun, Huiquo2; Han, Jingtai2; Higgitt, Dauid Laurence1
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2009
卷号407期号:2页码:815-825
关键词Dissolved organic carbon Particulate organic carbon Soil erosion Human impacts C/N ratio Stable carbon isotope Zhujiang (Pearl River)
ISSN号0048-9697
DOI10.1016/j.scitotenv.2008.09.022
文献子类Article
英文摘要This study aims to investigate the state of the riverine organic carbon in the Luodingjiang River under human impacts, such as reforestation, construction of reservoirs and in-stream damming. Seasonal and spatial characteristics of total suspended sediment (TSS), dissolved organic carbon (DOC) and particulate organic carbon (POC), as well as C/N ratios and the stable carbon isotopic signatures of POC (delta(13)C(POC)) were examined based on a one-year study (2005) in the basin-wide scale. More frequent sampling was conducted in the outlet of the river basin at Guanliang hydrological station. DOC and POC concentrations showed flush effects with increasing water discharge and sediment load in the basin-wide scale. Atomic C/N ratio of POC had a positive relationship with TSS in the outlet of the basin, indicating the reduced aquatic sources and enhanced terrestrial sources during the high flood season. However, the similar relationship was not observed in the basin-wide scale mainly due to the spatial distributions of soil organic carbon and TSS. delta(13)C(POC) showed obvious seasonal variations with enriched values in the period with high TSS concentration, reflecting the increased contribution from C(4) plants with enhanced soil erosion. The specific flux of the total organic carbon (2.30 t km(-2) year(-1)) was smaller than the global average level. The ratio of DOC to POC was 1.17, which is higher than most rivers under Asian monsoon climate regime, The organic carbon flux was estimated to decline with decreasing sediment load as a result of reforestation, reservoir construction and in-stream damming, which demonstrates the impacts of human disturbances on the global carbon cycle. (C) 2008 Elsevier B.V. All rights reserved.
WOS关键词TURBID RIVERS ; XIJIANG RIVER ; AMAZON RIVER ; LANYANG HSI ; TRANSPORT ; MATTER ; SEDIMENT ; YANGTZE ; TAIWAN ; BUDGET
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000262076100009
出版者ELSEVIER SCIENCE BV
资助机构National University of Singapore(R-109-000-086-646) ; National University of Singapore(R-109-000-086-646) ; National University of Singapore(R-109-000-086-646) ; National University of Singapore(R-109-000-086-646) ; National University of Singapore(R-109-000-086-646) ; National University of Singapore(R-109-000-086-646) ; National University of Singapore(R-109-000-086-646) ; National University of Singapore(R-109-000-086-646)
源URL[http://ir.iggcas.ac.cn/handle/132A11/70740]  
专题中国科学院地质与地球物理研究所
通讯作者Zhang, Shurong
作者单位1.Natl Univ Singapore, Dept Geog, Singapore 117570, Singapore
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Shurong,Lu, X. X.,Sun, Huiquo,et al. Geochemical characteristics and fluxes of organic carbon in a human-disturbed mountainous river (the Luodingjiang River) of the Zhujiang (Pearl River), China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2009,407(2):815-825.
APA Zhang, Shurong,Lu, X. X.,Sun, Huiquo,Han, Jingtai,&Higgitt, Dauid Laurence.(2009).Geochemical characteristics and fluxes of organic carbon in a human-disturbed mountainous river (the Luodingjiang River) of the Zhujiang (Pearl River), China.SCIENCE OF THE TOTAL ENVIRONMENT,407(2),815-825.
MLA Zhang, Shurong,et al."Geochemical characteristics and fluxes of organic carbon in a human-disturbed mountainous river (the Luodingjiang River) of the Zhujiang (Pearl River), China".SCIENCE OF THE TOTAL ENVIRONMENT 407.2(2009):815-825.

入库方式： OAI收割

来源：地质与地球物理研究所

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