KMS Institute of soil and water conservation Chinese Academy of Sciences
| 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.
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| 文章类型 | Article |
| 2017 | |
| 发表期刊 | JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
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| ISSN | 0265-931X |
| 通讯作者邮箱 | hwtsdyt@163.com ; lizw@hnu.edu.cn |
| 卷号 | 167页码:201-210 |
| 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. |
| 关键词 | Soil Organic Carbon Isotopes Land Use Types Sediment Check-dam Loess Plateau |
| 学科领域 | Environmental Sciences & Ecology |
| DOI | 10.1016/j.jenvrad.2016.10.022 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 出版地 | OXFORD |
| 语种 | 英语 |
| WOS记录号 | WOS:000392779000025 |
| 出版者 | ELSEVIER SCI LTD |
| 项目资助者 | 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] |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | sbir.nwafu.edu.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.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 |
| 推荐引用方式 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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