Research on the Influence of Different Grade Roads on the Landscape Connectivity of Ecological Space in Fuzhou
The expansion of road space leads to the fragmentation of urban ecological space and the obstruction of landscape connection.It is of great significance to scientifically analyze the impact of different grade roads on the landscape connectivity of ecological space to guide the site selection of ecological restoration projects and the layout of future road networks.In this paper,morphological spatial pattern analysis(MSPA)and landscape connectivity model based on graph theory are used to extract the main ecological spaces in Fuzhou,and the impact of different grade roads on the landscape connectivity of ecological space under different distance thresholds is quantitatively analyzed through the scenarios with and without roads.The results show that:(1)Among all grade roads interference,expressway has the most significant impact on landscape connectivity,resulting in a decrease of 7.74%,6.53%and 8.96%in LCP,IIC and PC values respectively.(2)The existence of roads interferes with the importance of connectivity of patches in the ecological space,resulting in a sharp decrease in the number of patches with high landscape connectivity and a sharp increase in the number of patches with low landscape connectivity.(3)The influence degree of roads is expressway,county road,provincial road and national road from large to small,in which county road and expressway are the main influencing factors when the distance threshold is very low and very high respectively.(4)The landscape connectivity of ecological space of the districts and counties with larger proportion of ecological space and closer to the urban core area are more vulnerable to the impact of road.The results can provide scientific basis for the construction and optimization of the ecological spatial pattern in Fuzhou.
万方数据
维普
