生态环境学报2026，Vol.35Issue(2)：209-222,14.DOI:10.16258/j.cnki.1674-5906.2026.02.005
滇中城市群森林植被净初级生产力时空变化特征及其影响因素研究
Study on the Spatiotemporal Patterns and Driving Factors of Forest Vegetation Net Primary Productivity in the Central Yunnan Urban Agglomeration
摘要
Abstract
Revealing the carbon sink dynamics of forest ecosystems and their environmental response mechanisms in the Central Yunnan Urban Agglomeration provides crucial theoretical foundations for sustainable management of regional forest resources.Utilizing multi-source remote sensing data including MOD17A3H V6 NPP data,MCD12Q1 V6 land cover classification,ERA5 meteorological data,and SRTMGL1_003 elevation data,combined with multivariate statistical methods such as the Hurst index and partial derivative residual analysis,this study systematically investigated the spatiotemporal variation characteristics of forest net primary productivity(NPP)and its influencing factors in the Central Yunnan Urban Agglomeration from 2000 to 2020.The main findings include:1)From 2000 to 2020,the total forest area in the Central Yunnan Urban Agglomeration was 1.77×104 km2,of which broadleaf forests,coniferous forests,and mixed forests accounted for 0.34×104 km2,0.70×104 km2 and 0.73×104 km2,respectively.2)The total NPP of forests increased by an average of C 2.01 Tg·a-1per year(an increase of 60.5%),with the highest average annual growth rate in mixed forests(C 1.71 Tg·a-1),followed by coniferous forests(C 1.66 Tg·a-1)and broadleaf forests(C 0.80 Tg·a-1).3)In 55.8%of the forest areas,NPP showed an increasing trend,with 6.86%of the areas experiencing highly significant and significant increases.In contrast,44.2%of the forest areas showed a decreasing trend,with 2.10%of the areas experiencing significant decreases.4)The Hurst index was<0.5 in 78.0%of the areas,indicating that future NPP is likely to decrease gradually.5)Topography had a significant impact,with NPP peaking at elevations of 2100‒2400 m and decreasing with increasing slope.The southern aspect had the highest NPP.6)Human activities contributed to 99.3%of the changes,making them the dominant factor for NPP improvement(accounting for 33.7%).However,the combined effects of climate change and human activities were the main cause of NPP degradation(accounting for 30.6%).The findings can provide a scientific reference for forest carbon cycle research and sustainable forest resource management in the region.关键词
森林/净初级生产力(NPP)/时空变化/气候变化/人类活动/滇中城市群Key words
forest/net primary productivity/spatiotemporal patterns/climate change/human activities/the Central Yunnan Urban Agglomeration分类
农业科技引用本文复制引用
余燕鞠,丁雪..滇中城市群森林植被净初级生产力时空变化特征及其影响因素研究[J].生态环境学报,2026,35(2):209-222,14.基金项目
国家自然科学基金项目(42261073 （）
41971369) （）
云南省基础研究专项计划面上项目(202401AT0701103) （202401AT0701103）
