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Tracing the source of sedimentary organic carbon in the Loess Plateau of China: An integrated elemental ratio, stable carbon signatures, and radioactive isotopes approach
Liu, Chun1,2; Dong, Yuting1,3; Li, Zhongwu1,2; Chang, Xiaofeng1; Nie, Xiaodong2,4; Liu, Lin1; Xiao, Haibing1; Bashir, Hassan2,4; Dong, YT; Li, ZW (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shanxi, Peoples R China.; Li, ZW (reprint author), Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
SubtypeArticle
2017
Source PublicationJOURNAL OF ENVIRONMENTAL RADIOACTIVITY
ISSN0265-931X
description.correspondentemailhwtsdyt@163.com ; lizw@hnu.edu.cn
Volume167Pages:201-210
AbstractSoil erosion, which will induce the redistribution of soil and associated soil organic carbon (SOC) on the Earth's surface, is of critically importance for biogeochemical cycling of essential elements and terrestrial carbon sequestration. Despite the importance of soil erosion, surprisingly few studies have evaluated the sources of eroded carbon (C). This study used natural abundance levels of the stable isotope signature (C-13) and radioactive isotopes (Cs-137 and Pb-210(ex)), along with elements ratio (C/N) based on a two end member mixing model to qualitatively and quantitatively identify the sources of sedimentary OC retained by check dam in the Qiaozigou small watershed in the Loess Plateau, China. Sediment profiles (0-200 cm) captured at natural depositional area of the basin was compared to possible source materials, which included: superficial Loess mineral soils (0-20 cm) from three land use types [i.e., grassland (Medicago sativa), forestland (Robinia pseudoacacia.), shrubland (Prunus sibirica), and gully land (Loess parent material.)]. The results demonstrated that SOC in sediments showed significantly negative correlation with pH (P < 0.01), and positive correlation with soil water content (SWC) (P < 0.05). The sedimentary OC was not derived from grasslands or gullies. Forestland and shrubland were two main sources of eroded organic carbon within the surface sediment (0-60 cm deep), except for that in the 20-40 cm soil layer. Radionuclides analyses also implied that the surface sediments retained by check dams mainly originated from soils of forestland and shrubland. Results of the two end-member mixing model demonstrated that more than 50% SOC (mean probability estimate (MPE) 50.13% via C-13 and 60.53% via C/N) in surface sediment (0-20 cm deep) derived from forestland, whereas subsurface sedimentary SOC (20-200 cm) mainly resulted from shrubland (MPE > 50%). Although uncertainties on the sources of SOC in deep soils exist, the soil organic delta C-13 and C/N is still an effective indicator for sources of sedimentary organic carbon in the deposition zone in the short term (<10 years). (C) 2016 Elsevier Ltd. All rights reserved.
KeywordSoil Organic Carbon Isotopes Land Use Types Sediment Check-dam Loess Plateau
Subject AreaEnvironmental Sciences & Ecology
DOI10.1016/j.jenvrad.2016.10.022
URL查看原文
Indexed BySCI
Publication PlaceOXFORD
Language英语
WOS IDWOS:000392779000025
PublisherELSEVIER SCI LTD
Funding OrganizationState Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021402-1501]; Chinese Academy of Sciences [A315021407]; National Natural Science Foundation of China [41271294] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021402-1501]; Chinese Academy of Sciences [A315021407]; National Natural Science Foundation of China [41271294]
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8042
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorDong, YT; Li, ZW (reprint author), Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shanxi, Peoples R China.; Li, ZW (reprint author), Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
Affiliation1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shanxi, Peoples R China
2.Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
3.Yellow River Conservancy Commiss, Tianshui Soil & Water Conservat Expt Stn, Tianshui 741000, Gansu, Peoples R China
4.Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China
Recommended Citation
GB/T 7714
Liu, Chun,Dong, Yuting,Li, Zhongwu,et al. Tracing the source of sedimentary organic carbon in the Loess Plateau of China: An integrated elemental ratio, stable carbon signatures, and radioactive isotopes approach[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2017,167:201-210.
APA Liu, Chun.,Dong, Yuting.,Li, Zhongwu.,Chang, Xiaofeng.,Nie, Xiaodong.,...&Li, ZW .(2017).Tracing the source of sedimentary organic carbon in the Loess Plateau of China: An integrated elemental ratio, stable carbon signatures, and radioactive isotopes approach.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,167,201-210.
MLA Liu, Chun,et al."Tracing the source of sedimentary organic carbon in the Loess Plateau of China: An integrated elemental ratio, stable carbon signatures, and radioactive isotopes approach".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 167(2017):201-210.
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