| In the face of the current ecological environment problems,this paper takes zhengzhou city region space scale as the study area,the land ecosystem service value assessment method is introduced into the ecological planning of zhengzhou city,the ecosystem service value and the relationship between the ecological space,and combining the theory of landscape ecology and urban planning,ecological space planning of zhengzhou city region,From the perspective of improving the value of ecosystem services,a feasible ecological space planning framework and a multi-level planning strategy are proposed to optimize the urban ecological space form,promote the rational development of space and spatial control,protect the urban ecological pattern and achieve sustainable development.Based on the GIS platform and guided by "Landscape Ecology Theory","Ecological Space Theory" and "Ecological Space Planning Theory",this study utilized the evaluation method of ecosystem service value,GIS grid scale method,Moran’s I index,and hot spot analysis(Getis-Ord GI*).This paper-quantitatively studies the change characteristics of land use in urban space and time,and the main research contents and conclusions are as follows.(1)In terms of land use structure change,from 1992 to 2017,the land use types in Zhengzhou were mainly cultivated land and woodland,and the area of cultivated land accounted for the largest proportion.There were significant regional differences in the dynamic changes of land use types.The proportion of cultivated land in the total area decreased from 64%to 44%,that of woodland decreased from 26%to 24%,that of water body decreased from 3%to 2%,and that of construction land increased from 5%to 29%.The fragmentation degree of cultivated land landscape was the most obvious.By the end of the study,the land use structure in Zhengzhou was cultivated land>,woodland>,construction land>,grassland>,river.The ecological space of cultivated land,woodland and water accounted for 34.21%,63.03%and 2.75%of the total ecological space,respectively,and the ecological space of water body accounted for the least,which could not meet the water demand.(2)The total value of ecosystem services in Zhengzhou decreased from 123.83 × 108 yuanin 1992to 103.78×108 yuan in 2017,and the total value decreased by 20.05×108 yuan in 25 years,among which,the value of forest land decreased the most.Different ecosystem services contribute different values,and the contribution of maintaining nutrient cycle is the least,while the contribution of hydrological regulation is the largest.(3)on the spatial pattern of zhengzhou area ecosystem service value of high value area in the southwest of zhengzhou zhongshan,low mountains,along the Yellow River area and southern area natural vegetation resources are rich,low in downtown area focused on the investigation on intensive human activities,including urbanization rate and high proper population intensive activities of rural settlements.Ecosystem service value is positively correlated in space.(4)Based on the spatial visualization of the value of ecosystem services of land,the landscape pattern of ecological space in Zhengzhou was understood.On this basis,the ecological space in Zhengzhou was divided into core area,buffer area,transition area and low-sensitive area according to the evaluation results of ecosystem service value.The results show that the coupling degree of ecological space elements in Zhengzhou lacks a systematic structure,the ecological space pattern is not perfect,the connectivity,the ecological core area and the ecological nodes are not stable enough,and the protection strength is insufficient,which makes it easy to disappear and transfer due to human interference.According to different functional partition,based on the ecosystem service value assessment and the present condition of the ecological space pattern,combined with the patch,corridor,matrix landscape structure model,from the identification of ecological space hub,link expressway,river corridor,three aspects of ecological space nodes are added to build "hub-space corridor links-node" mode of network layout,It constitutes the ecological space network system of Zhengzhou.Taking the core area as the hub for ecological protection,road and river corridor in buffer zone,transition zone and low-sensitive zone should be improved,and patch nodes should be added in areas with rich natural vegetation to form the ecological space network system of Zhengzhou and optimize the ecological space pattern of Zhengzhou. |
