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应用生态学报 ›› 2022, Vol. 33 ›› Issue (12): 3321-3327.doi: 10.13287/j.1001-9332.202212.025

• 研究论文 • 上一篇    下一篇

基于地理探测器的宁夏贺兰山植被覆盖度时空分异及驱动因子

林妍敏1,2, 李文慧1,2, 南雄雄3, 张俊华4, 胡志瑞5, 倪细炉4, 王芳1,2*   

  1. 1宁夏大学地理科学与规划学院, 银川 750021;
    2教育部中阿旱区特色资源与环境治理国际合作联合实验室, 银川 750021;
    3种苗生物工程国家重点实验室, 银川 750001;
    4宁夏大学生态环境学院, 银川 750021;
    5宁夏国土资源调查监测院, 银川 750002
  • 收稿日期:2022-01-19 接受日期:2022-09-15 出版日期:2022-12-15 发布日期:2023-07-05
  • 通讯作者: * E-mail: fangwang0820@163.com
  • 作者简介:林妍敏, 女, 1996年生, 硕士研究生。主要从事土壤环境与遥感研究。E-mail: linyanmin07@163.com
  • 基金资助:
    国家自然科学基金项目(42067022,41761066)、宁夏大学研究生创新项目(GIP2021016)、宁夏重点研发计划项目(2020BFG03006)和宁夏青年科技人才托举工程(TJGC2019003)

Spatial-temporal differentiation and driving factors of vegetation coverage in Ningxia Helan Mountain based on geodetector

LIN Yan-min1,2, LI Wen-hui1,2, NAN Xiong-xiong3, ZHANG Jun-hua4, HU Zhi-rui5, NI Xi-lu4, WANG Fang1,2*   

  1. 1School of Geographical Science and Planning, Ningxia University, Yinchuan 750021, China;
    2China-Arab Joint International Research Laboratory for Featured Resources and Environmental Governance in Arid Region, Yinchuan 750021, China;
    3State Key Laboratory of Seedling Bioengineering, Yinchuan 750001, China;
    4School of Ecology and Environment, Ningxia University, Yinchuan 750021, China;
    5Ningxia Survey and Monitoring Institute of Land and Resources, Yinchuan 750002, China
  • Received:2022-01-19 Accepted:2022-09-15 Online:2022-12-15 Published:2023-07-05

摘要: 监测区域植被覆盖变化并分析其驱动因子,有利于实现生态环境的可持续发展。本研究以1989—2021年Landsat 5/8遥感影像为数据源,利用像元二分模型获取宁夏贺兰山植被覆盖度,基于地理探测器量化了环境和人为等10个因子对其时空分布的影响。结果表明: 1989—2021年间,宁夏贺兰山平均植被覆盖度为35.8%,时间尺度上总体呈增加趋势,平均增幅为0.043·(10 a)-1,空间尺度上呈现从西南向东北递减的分布特征;研究区58.1%的区域植被覆盖度未来将持续性改善,但仍有30.7%的植被存在退化的潜在风险。降水是影响植被分布的主要环境因子,与单因子相比,环境因子和人为因子的交互作用对植被覆盖度的解释力更强,降水与其他因子的交互作用处于主导作用。

关键词: 贺兰山, 植被覆盖度, 地理探测器, 驱动因子

Abstract: Monitoring the regional changes in vegetation coverage and analyzing its driving factors are beneficial to realizing the sustainable development of ecological environment. Based on Landsat 5/8 remote sensing images from 1989 to 2021, vegetation coverage of Helan Mountain in Ningxia was estimated by pixel dichotomy model. In addition, the influence of 10 factors, including environmental factors and human factors, on the spatial-temporal variations of vegetation coverage was quantified by geodetector. The results showed that average vegetation coverage was 35.8% in the study area from 1989 to 2021. On the temporal scale, it showed an increasing trend, with an average increasing rate of 0.043·(10 a)-1. On the spatial scale, vegetation coverage presented a distribution characteristic of decreasing from southwest to northeast. 58.1% of vegetation coverage in the study area would continue to improve in the future, but 30.7% of vegetation would have the potential risk of degradation. Precipitation was the dominant environmental factor driving the distribution of vegetation. Compared with single factor, the interaction between environmental factors and human factors had a stronger impact on vegetation coverage, while the interaction between precipitation and other factors played a leading role.

Key words: Helan Mountain, vegetation coverage, geodetector, driving factor