Limited effects of control measures on soil recovery eight years after landslides in Northwestern China

IF 4.1 2区环境科学与生态学 Q1 ECOLOGY

Ecological Engineering Pub Date : 2025-08-11 DOI:10.1016/j.ecoleng.2025.107755

Yiting Guo , Yinan Liu , Junyuan Zheng , Jiangxia She , Aopeng Xie , Jiaying Wang , Chenghua Shi , Jian Li , Yongming Lin

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引用次数: 0

Abstract

On July 25, 2013, landslides in Tianshui City, Gansu Province, caused significant property damage. To assess the effects of control measures and forest types on soil properties, we conducted an observational study and analyzed 20 soil physical and chemical properties with four treatments (‘undisturbed', ‘disturbed', ‘plantation’, and ‘natural recovery’), two forest types (broadleaf forest and conifer forest) in 2021. Results showed that ‘plantation’ and ‘natural recovery’ sites in both forest types did not significantly improve soil properties compared to ‘disturbed' sites. Principal component analysis (PCA) showed that the first three components explained 72.16 % of the variation, representing soil recovering phase, soil geochemical background, and organic matter dynamics and physical microstructure. A minimum data set (MDS) including Available potassium (AK), Ferrum (Fe), and Aluminum (Al) was used to calculate the soil quality index (SQI). The SQI value of broadleaf forest was significantly lower than in conifer forest. Contrary to expectation, after eight years of recovery, control measures did not restore soil quality in ‘disturbed' sites, and soil quality remained lower, only reaching 40.3 %–68.7 % of ‘undisturbed' sites. Our work deeply analyzed soil loss induced by landslides, evaluated soil recovery rates under different control measures and forest types, and proposed some strategies to accelerate the recovery of soil quality. The study offers a theoretical and practical basis for control measures, the reconstruction of plant communities, and vegetation allocation in landslide-affected area.

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西北滑坡8年后土壤恢复控制措施效果有限

2013年7月25日，甘肃省天水市发生山体滑坡，造成重大财产损失。为了评估控制措施和森林类型对土壤性质的影响，我们在2021年进行了一项观察研究，分析了4种处理（“未受干扰”、“受干扰”、“人工种植”和“自然恢复”）、2种森林类型（阔叶林和针叶林）下20种土壤的物理和化学性质。结果表明，两种森林类型的“人工种植”和“自然恢复”地点与“受干扰”地点相比，都没有显著改善土壤性质。主成分分析（PCA）表明，前3个分量分别代表土壤恢复阶段、土壤地球化学背景、有机质动态和物理微观结构，解释了72.16%的变异。利用包括速效钾（AK）、铁（Fe）和铝（Al）在内的最小数据集（MDS）计算土壤质量指数（SQI）。阔叶林的SQI值显著低于针叶林。与预期相反，经过8年的恢复，控制措施并没有恢复“受干扰”地点的土壤质量，土壤质量仍然较低，仅达到“未受干扰”地点的40.3% - 68.7%。深入分析了滑坡引起的土壤流失，评价了不同控制措施和森林类型下的土壤恢复速率，并提出了加快土壤质量恢复的策略。该研究为滑坡灾区的控制措施、植物群落重建和植被配置提供了理论和实践依据。

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来源期刊

Ecological Engineering 环境科学-工程：环境

CiteScore

8.00

自引率

5.30%

发文量

293

审稿时长

57 days

期刊介绍： Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. The journal is meant for ecologists who, because of their research interests or occupation, are involved in designing, monitoring, or restoring ecosystems, and can serve as a bridge between ecologists and engineers. Specific topics covered in the journal include: habitat reconstruction; ecotechnology; synthetic ecology; bioengineering; restoration ecology; ecology conservation; ecosystem rehabilitation; stream and river restoration; reclamation ecology; non-renewable resource conservation. Descriptions of specific applications of ecological engineering are acceptable only when situated within context of adding novelty to current research and emphasizing ecosystem restoration. We do not accept purely descriptive reports on ecosystem structures (such as vegetation surveys), purely physical assessment of materials that can be used for ecological restoration, small-model studies carried out in the laboratory or greenhouse with artificial (waste)water or crop studies, or case studies on conventional wastewater treatment and eutrophication that do not offer an ecosystem restoration approach within the paper.