干旱区地理2025，Vol.48Issue(9)：1541-1554,14.DOI:10.12118/j.issn.1000-6060.2024.609
2000-2020年蒙古国植被净初级生产力时空演变特征及其影响因素
Spatiotemporal evolution characteristics and its influencing factors of net primary productivity of vegetation in Mongolia form 2000 to 2020
摘要
Abstract
Mongolia,China's northern neighbor,has a grassland ecosystem that is highly susceptible to natural factors and human activities.A univariate linear regression model was used to analyze the spatiotemporal varia-tions in net primary productivity(NPP)of vegetation in Mongolia from 2000 to 2020.A random forest regression model,combined with the Gridded Livestock of the World(GLW)dataset,was used to simulate livestock grazing density in Mongolia for 2020.The geographic detector method was then utilized to examine the factors influenc-ing NPP changes at both national and provincial scales,incorporating indicators such as average annualland sur-face temperature,average annual precipitation,downward shortwave radiation,soil moisture,NO2 emissions,and the human footprint index.The results indicated that:(1)From 2000 to 2020,the NPP in Mongolia exhibited spa-tial characteristics of increasing in the east and north and decreasing in the west and south.There is an overall in-creasing trend,dominated by nonsignificant increases,with nonsignificantly increasing areas accounting for 62.539%of Mongolia's land area.(2)Single-factor analysis revealed that climatic factors were the primary driv-ers of NPP changes in Mongolia,with downward shortwave radiation(q=0.615)and average annual precipitation(q=0.602)showing the highest contribution.However,the interactions between the human footprint index or NO2 emissions and climatic factors exceeded the explanatory power of individual factors.(3)At the provincial-scale,climate and topography remained the main drivers of NPP changes in the eastern and western regions of Mongo-lia.In contrast,NPP changes in the Central and Khangai regions of Mongolia were more influenced by the inter-action between human activities(grazing density and NO2 emissions)and natural factors,making these areas criti-cal for the prevention and control of future grassland degradation risk.These findings provide scientific insights for the effective management of grassland ecosystems in various regions of Mongolia and for the formulation of sustainable development strategies.关键词
NPP/时空变化/影响因素/放牧密度/蒙古国Key words
NPP/spatial and temporal changes/influencing factors/grazing density/Mongolia引用本文复制引用
黄静,李婷,李朋飞,Altansukh OCHIR,杨梅焕,王涛,李莎..2000-2020年蒙古国植被净初级生产力时空演变特征及其影响因素[J].干旱区地理,2025,48(9):1541-1554,14.基金项目
国家重点研发项目(2022YFE0119200) （2022YFE0119200）
蒙古科学技术基金会(NSFC_2022/01,CHN2022/276)资助 （NSFC_2022/01,CHN2022/276）
