Research on the Green Space Pattern of Putian City Based on Ecosystem Services Assessment
Under the influence of urbanization,the expansion of construction land will have a negative impact on the future level of ecosystem services.Assessing and predicting future land use changes and ecosystem services can provide effective support for urban sustainable development planning and decision-making.To study the dynamic trends of green spatial changes and the value of ecosystem services in Putian,Based on the CA-Markov model,analyze the spatial distribution of land use in Putian City in 2030,evaluate the future ecosystem service functions using the InVEST model,and then analyze the green spatial pattern of Putian City.The results indicate that:(1)From 2020 to 2030,the construction land in Putian City will continue to expand,increasing to 732.10 km2.In the next 10 years,the area of green spaces such as water bodies,forests,arable land,and grasslands will decrease by 97.92 km2.(2)the total ecosystem service index of Putian City After standardization has decreased from 0.5963 in 2020 to 0.5820 in 2030,This is mainly due to the encroachment of green space by construction land,resulting in a decrease in the overall level of ecosystem services;;in space,the total ecosystem service assessment index of Putian City shows the distribution characteristics of"high in the north,low in the south".(3)The green space for ecosystem services in Putian City is divided into three levels:high,medium and low.The area of green space for low ecosystem services will be increased to 1382.20 km2,and 229.83 km2 by 2030,and the area of green space for medium and high ecosystem services will be further reduced to 178.53 km2 and 1504.86 km2 respectively by 2030.In future urban green space planning,further expansion of construction land should be restricted,protection of existing green spaces should be strengthened,and the level of ecosystem services in Putian city should be improved by increasing vegetation and optimizing land use structure.
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