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应用生态学报 ›› 2025, Vol. 36 ›› Issue (1): 227-237.doi: 10.13287/j.1001-9332.202501.022

• 研究报告 • 上一篇    下一篇

基于空间滞后模型的粤北地区植被固碳变化的气候影响机制

潘森源1, 周俏薇1, 李景刚1,2, 孙传谆1,2*   

  1. 1华南农业大学公共管理学院, 广州 510640;
    2自然资源部华南热带亚热带自然资源监测重点实验室, 广州 510700
  • 收稿日期:2024-04-28 修回日期:2024-10-31 出版日期:2025-01-18 发布日期:2025-07-18
  • 通讯作者: *E-mail: suncz@scau.edu.cn
  • 作者简介:潘森源, 男, 1999年生, 硕士研究生。主要从事生态系统服务和生态安全格局研究。E-mail: 2336110478@ qq.com
  • 基金资助:
    国家社会科学基金项目(20CGL063)

Climate impact mechanism underlying vegetation carbon sequestration changes in northern Guangdong, China based on spatial lag model

PAN Senyuan1, ZHOU Qiaowei1, LI Jinggang1,2, SUN Chuanzhun1,2*   

  1. 1School of Public Management, South China Agricultural University, Guangzhou 510640, China;
    2Key Laboratory of Natural Resources Monitoring in Tropical and Subtropical Area of South China, Ministry of Natural Resources, Guangzhou 510700, China
  • Received:2024-04-28 Revised:2024-10-31 Online:2025-01-18 Published:2025-07-18

摘要: 开展植被固碳变化的影响机制研究,是实现区域“双碳”目标和高质量发展的科学支撑。然而,现有研究仍欠缺对影响因子时空自相关性的综合考虑,且未能准确反映因子的动态影响过程。基于此,本研究基于31个国家气象站点2001—2020年的气象数据及其周边10 km范围内植被净初级生产力(NPP)数据,准确识别粤北地区植被固碳量的时空变化特征;通过构建面板数据的空间滞后模型,结合偏相关分析和优势分析方法分析气候因子的动态影响机制,并进一步采用地理加权回归模型剖析影响因素的空间差异特征;采用残差趋势法分别测度气候因素和人类活动因素对植被固碳变化量的贡献度。结果表明: 2001—2020年,粤北地区平均固碳量为955.43 g C·m-2,区域的植被固碳量呈波动下降趋势,变化的空间分布具有较强的异质性;年均相对湿度、年均日照时数和年均降水量是显著影响区域植被固碳变化的气候因子;上述显著影响因素的空间差异较大,且与海拔存在较强的相关关系;相较于气候因素,人类活动是粤北地区植被固碳变化的主要影响因素,人类因素和气候因素的平均贡献率分别为70.2%和29.8%。

关键词: 植被净初级生产力, 植被固碳, 空间滞后模型, 气候影响机制, 贡献度

Abstract: Understanding the mechanisms driving changes in vegetation carbon sequestration is a scientific support for achieving regional “dual carbon” goals and high-quality development. However, current research lacks comprehensive consideration of the spatiotemporal autocorrelation of influencing factors, and fails to accurately reflect the dynamic impact process of these factors. We identified the spatiotemporal variation characteristics of vegetation carbon sequestration in northern Guangdong using meteorological data from 31 national meteorological stations and vegetation net primary productivity (NPP) data within a 10 km radius from 2001 to 2020. By constructing a spatial lag model of panel data and combining partial correlation analysis and dominance analysis methods, we analyzed the role of climate factors, and investigated the spatial variations of the influencing factors by the geographical weighted regression model. We further quantified the contribution of climate factors and human activity factors to vegetation carbon sequestration changes with the residual trend method. Results showed that, from 2001 to 2020, the average carbon sequestration in the study area was 955.43 g C·m-2. Vegetation carbon sequestration in this region showed a fluctuating downward trend, with strong spatial heterogeneity. The annual average relative humidity, annual average sunshine hours and annual average precipitation were climate factors with significant impacts on regional carbon sequestration changes. The spatial differences of those influencing factors were considerable, and there was a strong correlation with altitude. Compared to climate factors, human activities were the main influencing factor of vegetation carbon sequestration variations in northern Guangdong, with an average contribution rate of 70.2% for human factors and 29.8% for climate factors.

Key words: net primary productivity, vegetation carbon sequestration, spatial lag model, climate impact mechanism, contribution