Variation patterns of soil carbon, nitrogen and erosion on semi-arid loess hillslopes: contribution of connectivity
文献类型：期刊论文
| 作者 | Jin, Xiao-Liang3,4; Liu, Yu1,2,3,4; Yu, Xiu-Bo3,4 |
| 刊名 | CATENA
 |
| 出版日期 | 2025-12-31 |
| 卷号 | 261页码:109566 |
| 关键词 | Hillslope connectivity Planted shrub Soil carbon Soil nitrogen Drylands Loess Plateau |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2025.109566 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Revegetation on hillslopes was an effective countermeasure to reverse the severe soil erosion and land degradation. Shrub planting was widely adopted and established patchy vegetation covere on hillslopes in semiarid environment. On these shrub patch and inter-shrub matric mosaicked hillslopes, connectivity to upslope source areas plays crucial role in shaping the spatial patterns of soil carbon and nutrients on hillslopes. Therefore, detecting the contribution of the connectivity status will enhance the understanding of soil carbon and nitrogen variation pattern on hillslopes due to ground cover alternation. This study tried to reveal the differentiation of variation pattern of soil carbon and nitrogen as mitigated by the upslope connectivity by comparative investigation between the planted-shrub covered hillslope and the grassland hillslope in the hilly areas of the Loess Plateau, China. The upslope connectivity, location-specific soil loss, soil carbon and nitrogen content on the two hillslopes were investigated. Then the variations of soil nitrogen and soil carbon on hillslopes, and their responses to the connectivity were analyzed. Results showed enhanced upslope connectivity and consequently intensified soil loss for inter-shrub grassland, and weakened upslope connectivity of shrub patches occurred on revegetated shrubland hillslope. On contrast, soil carbon, soil nitrogen and soil loss in grassland hillslope and in inter-shrub grasslands of shrub hillslope varied linearly with increasing upslope connectivity. However, for shrub patches, soil carbon and nitrogen varied nonlinearly with increasing upslope connectivity, and with connectivity thresholds for the occurrence of a shift from positive correlation to negative correlation between soil properties and upslope connectivity. Our findings highlight that shrub establishment reshaped hillslope connectivity pattern and thus differentiated soil carbon and nutrient variation patterns on hillslopes. These results implies that the concept of connectivity should be incorporated into exploring the impacts of shrub intrusion on soil and the management of shrub ecosystems in semi-arid environment. |
| URL标识 | 查看原文 |
| WOS关键词 | ECOHYDROLOGICAL FEEDBACKS ; SEDIMENT CONNECTIVITY ; ECOSYSTEM STRUCTURE ; SHRUB ENCROACHMENT ; VEGETATION ; PLATEAU ; RUNOFF ; DEGRADATION ; LANDSCAPES ; NUTRIENTS |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001605584400002 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/217774]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Liu, Yu |
| 作者单位 | 1.Natl Observat & Res Stn Earth Crit Zone Loess Plat, Xian 710061, Peoples R China 2.Shaanxi Yanan Forest Ecosyst Observat & Res Stn, Beijing 100085, Peoples R China; 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Jin, Xiao-Liang,Liu, Yu,Yu, Xiu-Bo. Variation patterns of soil carbon, nitrogen and erosion on semi-arid loess hillslopes: contribution of connectivity[J]. CATENA,2025,261:109566. |
| APA | Jin, Xiao-Liang,Liu, Yu,&Yu, Xiu-Bo.(2025).Variation patterns of soil carbon, nitrogen and erosion on semi-arid loess hillslopes: contribution of connectivity.CATENA,261,109566. |
| MLA | Jin, Xiao-Liang,et al."Variation patterns of soil carbon, nitrogen and erosion on semi-arid loess hillslopes: contribution of connectivity".CATENA 261(2025):109566. |
入库方式： OAI收割
来源：地理科学与资源研究所
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