基于MODISNPP的2000—2023年三江源地区植被NPP时空演变及影响因素研究

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中图分类号：K903 文献标识码：A 文章编号：1007-0435（2025）09-3003-11

doi：10.11733/j.issn.1007-0435.2025.09.024

NPP Spatio-Temporal Evolution and Its Influencing Factors in the Three-RiverHeadwatersfrom 2000 to 2023Basedon MODISNPP

LI Wen-jing1，LI Wen-long²，XIONG You-cai³，LUO Qiong4，WANG Wen-Ying1.5* （1.CollegeofgaSQigioalUivesityiiniroveia;Clgofsnda encandTechoeitoreUit Province73Ooa;oiciilsiireo;de ScienceandSustaiabilityeple'sovementofQigharovice&BeijingNoralUniversityinnginghaiProviceina）

Abstract： Clarifying the currnt status and driving forces of vegetation Net Primary Productivity （NPP） changes in the Three-River Headwaters region can provide a scientific foundation and decision-making reference for future vegetation restoration and the dynamic adjustment of ecological projects.In this study，based on MODIS NPP data，we analyzed the vegetation NPP changes and its influencing factors in the Three-River Headwaters region using trend analysis，stability analysis，residual analysis，bias corelation analysis and geodetector，etc. The results showed that the overallNPP and the NPP of various vegetation types in the ThreeRiver Headwaters region exhibited an upward trend from 200O to 2O23，with an average growth rate of 1.38 g⋅m-2⋅a-1 C.Spatially，it displayed a distribution pattern characterized by higher values in the southeast and lower values in the northwest，with 97.92% of the region experiencing an increase in NPP，and the overall fluc tuation remained stable.Vegetation NPP in diferent areas of the Three-River Headwaters region exhibited varying response pattrns to temperature and precipitation，although temperature exerted a more significant impact on vegetation NPP in this region. Both climate change and human activities had positive effects on vegetation NPP in the Three-River Headwaters region，and the impacts of human activities on vegetation NPP were both positive after 2Ol8.In Factor-detector detection，the average explanatory power of altitude and temperature exceeded 50% ，while precipitation，land use，and population also demonstrated over 50% explanatory power in interaction-detector.

Key words：MODIS NPP; The Three-River Headwaters ;Spatiotemporal evolution; Influencing factors

植被净初级生产力（Net primaryproduction，NPP）可以有效量化陆地生态系统的生产能力，是陆地碳循环的重要组成部分，能够反映气候变化和人类活动对陆地生物圈的综合影响[1。（剩余16158字）