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气候和土地利用变化对广东省植被净初级生产力的影响

  • 步可 ,
  • 王雪 ,
  • 姚凤梅
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  • 中国科学院大学地球与行星科学学院,北京 100049
E-mail:yaofm@ucas.ac.cn

收稿日期: 2024-11-07

  修回日期: 2025-04-09

  网络出版日期: 2025-07-17

基金资助

国家自然科学基金(42071425)

Impact of climate and land use changes on net primary productivity of vegetation in Guangdong Province

  • Ke BU ,
  • Xue WANG ,
  • Fengmei YAO
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  • College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

Received date: 2024-11-07

  Revised date: 2025-04-09

  Online published: 2025-07-17

摘要

基于2003—2022年中分辨率成像光谱仪(MODIS)植被净初级生产力(NPP)数据,采用Theil-Sen趋势分析和Mann-Kendall检验,探讨近20年广东省NPP的时空变化规律。结合相关分析和地理探测器方法评估气候因子和土地利用变化对植被NPP的影响。结果表明:珠三角NPP低值区呈现显著退化趋势,而粤东与粤北NPP高值区呈现明显或缓慢改善趋势。此外,气候和土地利用变化对NPP的相对贡献度分别为59.48%和40.51%,其中气温、降水和辐射对NPP的贡献度分别为17.51%、58.32%和24.17%。在不同未来气候情景下,高排放条件会导致NPP高值区面积减少,低值区面积增加;而中等排放条件下,NPP呈现稳定增长趋势。

本文引用格式

步可 , 王雪 , 姚凤梅 . 气候和土地利用变化对广东省植被净初级生产力的影响[J]. 中国科学院大学学报, 2026 , 43(5) : 706 -719 . DOI: 10.7523/j.ucas.2025.021

Abstract

Net primary productivity (NPP) serves as a vital metric for evaluating the carbon sequestration potential of terrestrial ecosystems. Investigating the impacts of climate change and land use change on vegetation NPP is crucial for understanding regional ecosystem carbon sink management. This study utilizes moderate resolution imaging spectroradiometer (MODIS) NPP data from 2003 to 2022, combined with Theil-Sen trend analysis and the Mann-Kendall test, to examine the spatiotemporal patterns of NPP in Guangdong Province over the past two decades. Furthermore, correlation analysis and the Geodetector were applied to quantify the effects of climatic factors and land use changes on vegetation NPP. The findings reveal that low-NPP regions in the Pearl River Delta exhibit a significant declining trend, whereas high-NPP regions in eastern and northern Guangdong demonstrate either pronounced or gradual improvement. Additionally, the relative contributions of climate change and land use change to NPP variations were 59.48% and 40.51%, respectively. Among climatic factors, precipitation had the highest contribution (58.32%), followed by radiation (24.17%) and temperature (17.51%). Under future climate scenarios, high-emission conditions are projected to reduce the extent of high-NPP areas while expanding low-NPP areas, whereas moderate-emission scenarios are expected to sustain a steady increase in NPP.

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