Spatiotemporal evolution and regulation strategies of ecological risks in green space landscape in the water network area of southern Jiangsu
[Objective]This study aims to discuss the ecological risks caused by landscape fragmentation and habitat quality decline in green space in the water network area of southern Jiangsu Province under the background of rapid urbanization.[Method]Taking Kunshan City as an example,the land use data from 2000,2010 and 2020 were selected,and the landscape pattern index was used to construct a landscape ecological risk assessment model.The spatiotemporal evolution characteristics of landscape ecological risks in green space of Kunshan City from 2000 to 2020 were analyzed,and green space control zones were defined based on the characteristics of landscape ecological risk level transfer and change.[Result](1)From 2000 to 2020,the total area of green space in Kunshan City showed a continuous reduction trend,with a significant decrease in cultivated land,a total reduction of 20 203.11 hm2,accounting for 21.70％.The water area first slightly increased and then continued to decrease,with an overall decrease of 3 813.66 hm2.The proportion of forest land and grassland was relatively small and stable.The area transfer matrix between land types of green space mainly showed a shift from arable land to construction land,reflecting the increasing interference degree of green space by artificial construction.(2)There were certain changes in the distribution of landscape ecological risks,mainly manifested as a shift from low risk level to higher risk level.The proportion of the highest and high risk areas increased by 8.10％and 6.61％,respectively,while the area of low and the lowest risk areas decreased by 8.25％and 9.73％,respectively.(3)Based on the characteristics of landscape ecological risk level transfer and change,the study area was divided into three types of control zones:key restoration zone,coordinated buffer zone and optimal utilization zone.[Conclusion]The landscape ecological risk of green space in Kunshan City shows an upward trend.There is a correlation between the transformation of green space land use type and landscape ecological risk,reflecting the increasing ecological pressure of green space under human construction activities.Green space zoning regulation strategies based on the spatiotemporal evolution characteristics of risks are proposed in this study.[Ch,4 fig.5 tab.28 ref.]
green spacelandscape ecological riskwater network arearisk regulation and controlKunshan City
万方数据
维普
