Spatiotemporal response of ecosystem service value to land use changes in national key ecological functional areas
[Objective]This study,with an investigation into the impact of land use structure transformation in national key ecological functional areas on ecosystem service functions,is aimed to provide reference for the formulation of local economic and social development plans as well as the rational and effective allocation of land resources.[Method]With land use data collected of Taihu County in 2000,2010,and 2020,a land use transfer matrix was established to analyze the law of land use changes whereas spatial quantitative calculations were performed based on the ecosystem service value(ESV)at the 600 mx600 m grid scale.Afterwards,spatial autocorrelation was employed to explore the spatiotemporal aggregation characteristics and hot and cold hot spot differentiation rules of ecosystem service value on land use changes.[Result](1)The change in land use area in Taihu County from 2000 to 2020 was generally gradual with the proportion of construction land increasing by 1.43％,and the proportion of cultivated land decreasing by 1.00％;the area of grassland,forestland,and cultivated land from 2000 to 2020 was on the decline year by year while the construction land increased year by year.(2)The comprehensive land use change index was higher than 0 and the county's land use change structure was in the growth stage.(3)The past 20 years witnessed a decline in the ecosystem service value of all land use types in Taihu County with waters and forestland having the highest contribution rate to the total ecosystem service value of the study area.(4)Land use changes were positively correlated with the spatial distribution of ESV,mainly in low-low agglomeration areas and high-high agglomeration areas and such a correlation is enhanced with the changes in the land use structure,and in terms of the distribution of cold and hot spots in Taihu County,hot spots were mainly in the middle area while the cold ones are distributed in the northern area,with noticeable differentiation in the southern part.[Conclusion]Different land use types would cause significant differences in the quantity and spatial distribution of ESV in Taihu County,therefore,it is necessary to focus on the protection of water body area and the optimization of land resource allocation in the expansion of construction land in the south,and strengthen the optimization of land resource allocation for the sake of sustainable and effective ecological development of Taihu County.[Ch,4 fig.7 tab.31 ref.]
land use changeecosystem service value(ESV)spatial correlation analysisTaihu County
国家科技期刊平台
NSTL
万方数据
