Soil Organic Carbon Redistribution and Delivery by Soil Erosion in a Small Catchment of the Yellow River Basin
文献类型：期刊论文
| 作者 | Zeng, Yi4,5; Fang, Nufang1,4; Shi, Zhihua1,5,6; Lu, Xixi2; Wang, Zhengang3 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2020-05-01 |
| 卷号 | 125期号:5页码:16 |
| ISSN号 | 2169-8953 |
| 关键词 | soil organic carbon loess plateau soil erosion restoration sediment fingerprinting |
| DOI | 10.1029/2019JG005471 |
| 通讯作者 | Fang, Nufang(fnf@ms.iswc.ac.cn) |
| 英文摘要 | Soil erosion modulates the atmospheric CO2 level by affecting the redistribution of young biospheric organic carbon (OCbio) and ancient petrogenic organic carbon (OCpetro) in different order streams. However, the fate of soil organic carbon (SOC) in low-order stream systems is still uncertain due to the complex influences of terrain, land uses, and anthropogenic disturbances. Here, we used the geochemical properties fingerprinting method and a radiocarbon-based two-member mixing model to clarify the source, budgets, and composition of SOC in a low-order stream catchment in the Yellow River basin. The results showed that the primary source of SOC in the catchment was agricultural activity area, which accounted for 68.5%. After vegetation restoration, the SOC delivery rate and loss rate decreased from 0.38 +/- 0.06 to 0.26 +/- 0.04 and 0.19 +/- 0.06 to 0.14 +/- 0.04 t center dot ha(-1)center dot yr(-1), respectively. The SOC mobilized by soil erosion in the source area was 1,085.8 +/- 170.5 t from 1969 to 2015, and the SOC lost during the transport process was 552.9 +/- 170.1 t. The lost carbon was dominated by OCbio, whereas the loss of OCpetro was minimal. Soil erosion can mobilize the OCpetro sequestered in terrestrial ecosystems and deliver it to a river system if it is not intercepted. The oxidation of OCpetro during long-distance fluvial transport may represent a significant carbon source for atmospheric CO2 on a geological timescale. This study contributes to our understanding of the carbon sink/source issue and quantifies the SOC budgets in stream systems. |
| WOS关键词 | LOESS PLATEAU ; SEDIMENT SOURCES ; CHECK DAMS ; SEQUESTRATION ; TRANSPORT ; NITROGEN ; MATTER ; EXPORT ; STABILIZATION ; DEPOSITION |
| 资助项目 | National Natural Science Foundation of China[41525003] ; National Natural Science Foundation of China[41671282] ; Strategic PriorityResearch Program of Chinese Academy of Sciences[XDB 40020302] |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000537869800002 |
| 资助机构 | National Natural Science Foundation of China ; Strategic PriorityResearch Program of Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/159468]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Fang, Nufang |
| 作者单位 | 1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 2.Natl Univ Singapore, Dept Geog, Singapore, Singapore 3.Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou, Peoples R China 4.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 5.Huazhong Agr Univ, Coll Resources & Environm, Wuhan, Peoples R China 6.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, Yi,Fang, Nufang,Shi, Zhihua,et al. Soil Organic Carbon Redistribution and Delivery by Soil Erosion in a Small Catchment of the Yellow River Basin[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2020,125(5):16. |
| APA | Zeng, Yi,Fang, Nufang,Shi, Zhihua,Lu, Xixi,&Wang, Zhengang.(2020).Soil Organic Carbon Redistribution and Delivery by Soil Erosion in a Small Catchment of the Yellow River Basin.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(5),16. |
| MLA | Zeng, Yi,et al."Soil Organic Carbon Redistribution and Delivery by Soil Erosion in a Small Catchment of the Yellow River Basin".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.5(2020):16. |
入库方式： OAI收割
来源：地理科学与资源研究所
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