Spatial and Temporal Changes in Vegetation Cover and their Drivers in the Weihe River Basin

doi:10.11733/j.issn.1007-0435.2025.10.026

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (10): 3381-3395.DOI: 10.11733/j.issn.1007-0435.2025.10.026

Spatial and Temporal Changes in Vegetation Cover and their Drivers in the Weihe River Basin

ZOU Jia-ying¹, WANG Yi-bo², HAN Xin-ning³, TIAN Hui-hui², TUO Hang-hang⁴, YE Fa-ming^5,6, YIN Zi-ming⁴, MA Xiao-rui⁴, YANG Qing^5,6, LI Wei⁴

1. College of Animal Science and Technology, Northwest AF University, Yangling, Shaanxi Province 712100, China;
2. College of Grassland Agriculture, Northwest AF University, Yangling, Shaanxi Province 712100, China;
3. College of Resources, Environment and Life Sciences, Ningxia Normal University, Guyuan, Ningxia Province 756000, China;
4. College of Soil and Water Conservation Science and Engineering, Northwest AF University, Yangling, Shaanxi Province 712100, China;
5. Institute of Soil and Water Conservation, CASMWR, Yangling, Shaanxi Province 712100, China;
6. University of Chinese Academy of Science, Beijing 111049, China

Received:2025-04-23 Revised:2025-06-12 Published:2025-10-17

渭河流域植被覆盖时空变化及其驱动因素

邹佳莹¹, 王亦波², 韩新宁³, 田慧慧², 拓行行⁴, 叶发明^5,6, 尹子鸣⁴, 马晓瑞⁴, 杨庆^5,6, 李伟⁴

1. 西北农林科技大学动物科技学院, 陕西杨凌 712100;
2. 西北农林科技大学草业与草原学院, 陕西杨凌 712100;
3. 宁夏师范大学资源环境与生命科学学院, 宁夏固原 756000;
4. 西北农林科技大学水土保持科学与工程学院, 陕西杨凌 712100;
5. 中国科学院水利部水土保持研究所, 陕西杨凌 712100;
6. 中国科学院大学, 北京 111049

通讯作者: 李伟,E-mail:liwei2013@nwsuaf.edu.cn
作者简介:李伟,E-mail:liwei2013@nwsuaf.edu.cn
基金资助:
国家自然科学基金项目（42277464）；国家重点研发计划项目（2022YFF1302800）；陕西省重点研发项目（2024SF-YBXM-545）；宁夏自然科学基金（2025AAC030610）资助

Abstract

Abstract: As a key region in the construction of the ecological barrier of the Loess Plateau and the high-quality development strategy of the Yellow River Basin， the study of the evolution of vegetation cover （Fraction vegetation coverage （FVC）） in the Weihe River Basin is of great significance to optimize the regional ecological security pattern. Based on the MODIS NDVI data from 2000 to 2023， a multi-scale analytical framework was constructed by combining the improved image element dichotomous model and geo-temporal analysis methods to systematically explore the spatial and temporal evolution of FVC and its driving mechanism. The results showed that： FVC in the watershed increased by 0.0766% annually， but there was obvious spatial heterogeneity， and the degraded areas were scattered in the Guanzhong Plain urban agglomerations. The vegetation stability was high in alpine forested areas such as Qinba mountainous areas， whereas it fluctuated more in alluvial plains and loess hilly areas （17.3% of the total area）. 51.8% of the area showed an inverse persistent growth， indicating that its ecological restoration was facing a bottleneck of elasticity. The surface temperature （q=0.392） and average annual precipitation （q=0.354） were the dominant drivers， and the interaction between surface temperature and population density had the strongest effect on FVC （q=0.570）. The “pattern-process-mechanism” paradigm constructed in this study provides a scientific basis for differentiated management of ecological restoration.

Key words: Vegetation cover, Ecological restoration, Optimal Parameters-based Geographical Detectors, Weihe River basin

摘要： 渭河流域作为黄土高原生态屏障建设与黄河流域高质量发展战略的关键区域，其植被覆盖度（Fraction vegetation coverage，FVC）演变研究对优化区域生态安全格局具有重要意义。基于2000—2023年MODIS NDVI数据，结合改进型像元二分模型与地理时空分析方法，构建多尺度解析框架，系统探讨了FVC的时空演变及驱动机制。结果表明：流域FVC年际增速0.766×10^-3，但存在明显空间异质性，退化区域零散分布于关中平原城市群；秦巴山地等高山林区植被稳定性高，而冲积平原与黄土丘陵区波动较大（占17.3%）；51.8%区域呈反持续性增长，表明其生态恢复面临弹性瓶颈；地表温度（q=0.39）和年均降水（q=0.35）为主导驱动因子，地表温度与人口密度交互作用对FVC影响最强（q=0.57）。本研究构建的“格局-过程-机制”范式为生态修复差异化管理提供了科学依据。

关键词: 植被覆盖, 生态恢复, 最优参数地理探测器, 渭河流域

CLC Number:

X87
S812

ZOU Jia-ying, WANG Yi-bo, HAN Xin-ning, TIAN Hui-hui, TUO Hang-hang, YE Fa-ming, YIN Zi-ming, MA Xiao-rui, YANG Qing, LI Wei. Spatial and Temporal Changes in Vegetation Cover and their Drivers in the Weihe River Basin[J]. Acta Agrestia Sinica, 2025, 33(10): 3381-3395.

邹佳莹, 王亦波, 韩新宁, 田慧慧, 拓行行, 叶发明, 尹子鸣, 马晓瑞, 杨庆, 李伟. 渭河流域植被覆盖时空变化及其驱动因素[J]. 草地学报, 2025, 33(10): 3381-3395.

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Spatial and Temporal Changes in Vegetation Cover and their Drivers in the Weihe River Basin

渭河流域植被覆盖时空变化及其驱动因素

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