In order to provide a scientific basis for regional green ecological construction and national land resources de-velopment,this study explored the effects of land use change on vegetation net primary productivity(NPP).Taking Guangdong Province as an example,this paper used CASA model to simulate the spatial distribution of NPP in Guangdong Province from 2000 to 2020,analyzed the temporal and spatial evolution of land use and NPP,and studied the impact of land use change on NPP.The results show that from 2000 to 2020,the land use changes in Guangdong Province were ob-vious,showing obvious spatial differentiation,among which the changes in developed areas such as the Pearl River Delta were more obvious.NPP increased from 670.74 gC/m2 to 775.63 gC/m2,and the spatial distribution showed an increas-ing trend from the central area of the Pearl River Delta to the periphery.Land use change dominated by urban expansion is the main cause of NPP loss.The loss mainly comes from the conversion of high-productivity land such as cropland and forest land to construction land.Attention should be paid to optimizing the land use pattern,guide the orderly expansion of the cit-y,and achieve the coordination and unification of urban construction and ecological environment protection.
关键词
土地利用变化/净初级生产力/CASA模型/广东省
Key words
land use change/net primary productivity/CASA model/Guangdong Province
维普
万方数据