Land use change is the main factor driving the change of carbon stock,and assessing the impact of land use change on carbon stock is of great significance for carbon balance.Taking Jiangxi Province as an example,based on the InVEST-PLUS model,we explore the spatial and temporal evolution characteristics of land use change and carbon stock in Jiangxi Province from 1990 to 2020,and measure the evolution of carbon stock under various scenarios in Jiangxi Province in 2030.(1)The carbon stocks in Jiangxi Province in 1990,2000,2010 and 2020 were 1275.94×106 t,1276.00×106 t,1269.12×106 t and 1258.00×106 t,respectively,with an overall decreasing trend.The decrease of forest land was the main factor for the loss of carbon stock.Above-ground biomass carbon pool and soil carbon pool had the most carbon stock,accounting for 88.82%of the total carbon stock.(2)By 2030,the carbon stock of the natural development scenario,ecological protection scenario,and urban development scenario will decrease by 3.8×106 t,increase by 1.25×106 t,and decrease by 13.3×106 t,respectively,compared with 2020.it shows that the adoption of ecological protection measures and optimization of land-use structure can effectively control the decrease of carbon stock.(3)The areas with significantly higher carbon stocks are located in the mountainous areas of Gannan where ecological land use is continuous,while the areas with significantly lower carbon stocks are located in the northern regions of Gannan where carbon density values are low and construction land use is distributed in patches.The results of the study will provide a scientific basis for making reasonable ecological decisions for the construction of ecological civilization in Jiangxi Province and for realizing high-quality development.
关键词
土地利用/碳储量/InVEST模型/PLUS模型/变化分析
Key words
land use/carbon stock/InVEST model/PLUS model/change analysis
维普
万方数据