黄土高原地下啮齿类动物挖掘对土壤侵蚀的贡献
白晓亮(1997-), 女, 甘肃平凉人, 硕士生, 研究方向为生物地貌过程研究。E-mail: 220220949280@lzu.edu.cn |
收稿日期: 2024-05-07
修回日期: 2024-12-28
网络出版日期: 2025-05-23
基金资助
国家自然科学基金项目(42322101)
国家自然科学基金项目(42130110)
The contribution of subterranean rodent excavation to soil erosion in the Loess Plateau
Received date: 2024-05-07
Revised date: 2024-12-28
Online published: 2025-05-23
Supported by
National Natural Science Foundation of China(42322101)
National Natural Science Foundation of China(42130110)
白晓亮 , 耿豪鹏 , 刘茹 , 程维明 , 潘保田 . 黄土高原地下啮齿类动物挖掘对土壤侵蚀的贡献[J]. 地理学报, 2025 , 80(5) : 1327 -1338 . DOI: 10.11821/dlxb202505011
Subterranean rodent excavation activities constitute one of the factors influencing soil redistribution and erosion on hillslopes. Investigating these activities in depth contributes to a better understanding of the complex mechanisms of soil erosion. To explore the spatial distribution characteristics of subterranean rodent excavation activities and their impact on soil erosion in the Loess Plateau, this study conducted six months of fixed-point repeated monitoring on a typical hillslope (665 m2) in Pingdingshan, Huanxian county, located in the central part of the Loess Plateau. Utilizing unmanned aerial vehicle (UAV) surveying combined with field investigations, the study tracked the spatial distribution of subterranean rodent excavation activities, analyzed their effects on soil properties, and quantified the soil erosion generated by excavation activities on the study hillslope. The results indicate that: (1) Subterranean rodents exhibit a preference for feeding and burrowing activities in areas with gentle slopes, dispersed flow, and convex slope regions. (2) Excavation activities decrease the bulk density of fresh soil mounds by 14% (P < 0.05) compared to undisturbed soil, while porosity and saturated hydraulic conductivity increase by 11% (P < 0.05). (3) Over the observation period, subterranean rodent excavation activities overturned 0.13 t of soil onto the surface, with an associated slope transport flux of approximately 2.18 cm3/(cm·a). If all these fluxes were converted into soil erosion, the erosion modulus would be approximately 397 t/(km2·a). These results highlight the significant role of excavation activities in soil redistribution on hillslopes of the Loess Plateau, contributing to approximately 10.1% of the total soil erosion, which warrants attention in future assessments and modeling of soil erosion and loss.
Key words: subterranean rodents; excavation activities; soil erosion; Loess Plateau
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