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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

文献类型：期刊论文

作者Xiao, Haibing4; Bashir, Hassan1,3; 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.; Chang, Xiaofeng4; Li, Zhongwu3,4; Dong, Yuting2,4; Liu, Chun3,4; Li, ZW (reprint author), Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.; Liu, Lin4
刊名JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
出版日期2017
卷号167页码:201-210
关键词Soil Organic Carbon Isotopes Land Use Types Sediment Check-dam Loess Plateau
ISSN号0265-931X
DOI10.1016/j.jenvrad.2016.10.022
文献子类Article
英文摘要Soil 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.
学科主题Environmental Sciences & Ecology
URL标识查看原文
出版地OXFORD
语种英语
WOS记录号WOS:000392779000025
出版者ELSEVIER SCI LTD
资助机构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] ; 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] ; 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] ; 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]
源URL[http://ir.iswc.ac.cn/handle/361005/8042]  
专题水保所科研产出--SCI_2017--SCI
通讯作者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.
作者单位1.Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China
2.Yellow River Conservancy Commiss, Tianshui Soil & Water Conservat Expt Stn, Tianshui 741000, Gansu, Peoples R China
3.Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
4.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shanxi, Peoples R China
推荐引用方式
GB/T 7714		 Xiao, Haibing,Bashir, Hassan,Dong, YT,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 Xiao, Haibing.,Bashir, Hassan.,Dong, YT.,Li, ZW .,Chang, Xiaofeng.,...&Nie, Xiaodong.(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 Xiao, Haibing,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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