Contribution of hydrological connectivity to the retention of soil organic carbon by vegetation patches: Insight from a dryland hillslope on the Loess Plateau, China
文献类型：期刊论文
| 作者 | Zeng, Yingxi; Liu, Yu2; Yu, Xiubo |
| 刊名 | CATENA
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 216页码:9 |
| ISSN号 | 0341-8162 |
| 关键词 | Carbon retention Soil erosion Sediment retention Hillslope scale Dryland ecosystem Loess Plateau |
| DOI | 10.1016/j.catena.2022.106436 |
| 通讯作者 | Liu, Yu(liuyu@igsnrr.ac.cn) |
| 英文摘要 | Hydrological connectivity affects the carbon capture and redistribution over landscapes. However, the contribution of hydrological connectivity to the spatial heterogeneity of carbon sequestration, particularly the spatial variation of carbon retention, is not well covered in carbon inventory and estimation. This study addressed the contribution of hydrological connectivity to the soil carbon retention on a hillslope with a mosaic of shrub patches and inter-shrub area covered by grass, biological crust and bare soil on the Loess Plateau, China. The variation of the efficiency of the shrub patches to retain SOC and the SOC difference between shrub patch and inter-shrub area among slope positions were revealed in the context of varied hydrological connectivity indicated by the contributing area. The results illustrate that the efficiency of shrub patches to retain sediment and SOC transported from upslope areas decreased from the hillslope top to the slope foot, though the morphological traits of the shrub patches did not significantly varied. The mean SOC in shrub patches declined, and increased in intershrub areas from hillslope top to slope foot. Consequently, the SOC difference between shrub patch and intershrub area declined from the top to the foot of the hillslope. These results imply that the size of contributing areas is the dominant contributor to the spatial variation of the efficiency of shrub patches to retain SOC, and the pattern of SOC difference between shrub patches and inter-shrub areas. The results highlight the necessity to incorporate the spatial heterogeneity of hydrological connectivity into evaluating the carbon retention efficiency of vegetation, especially in the dryland landscape. This study also revealed that the lack of hydrological connectivity may lead to great uncertainty in assessing SOC sequestration in terrestrial landscapes. |
| WOS关键词 | WATER EROSION ; SEDIMENT ; RUNOFF ; SEQUESTRATION ; REDISTRIBUTION ; CATCHMENT ; LANDSCAPE ; FRAMEWORK ; PATTERNS ; IMPACT |
| 资助项目 | National Natural Science Foundation of China[42071239] ; National Natural Science Foundation of China[41671186] ; International Partnership Program of the Chinese Academy of Sciences[121311KYSB20170004] ; National Key Research and Development Program of China[2018YFE0106000] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000879310000005 |
| 资助机构 | National Natural Science Foundation of China ; International Partnership Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/186425]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Yu |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, Yingxi,Liu, Yu,Yu, Xiubo. Contribution of hydrological connectivity to the retention of soil organic carbon by vegetation patches: Insight from a dryland hillslope on the Loess Plateau, China[J]. CATENA,2022,216:9. |
| APA | Zeng, Yingxi,Liu, Yu,&Yu, Xiubo.(2022).Contribution of hydrological connectivity to the retention of soil organic carbon by vegetation patches: Insight from a dryland hillslope on the Loess Plateau, China.CATENA,216,9. |
| MLA | Zeng, Yingxi,et al."Contribution of hydrological connectivity to the retention of soil organic carbon by vegetation patches: Insight from a dryland hillslope on the Loess Plateau, China".CATENA 216(2022):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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