[Temporal and Spatial Relationship Between Ecological Resilience and Land Use Intensity in the Xi'an City].

Abstract

The study of the temporal and spatial relationship between ecological resilience and land use intensity is of great value for solving the ecological security problems caused by rapid urban expansion. Based on the three dimensions of resistance, adaptability, and resilience, the ecological resilience evaluation system was constructed, and the spatial and temporal change pattern of ecological resilience and land use intensity in Xi'an from 1990 to 2020 was analyzed by using the ecosystem service value equivalent factor, ecological resilience, landscape stability, and land use intensity models. Finally, we used bivariate spatial autocorrelation, geographical weighted regression, and other methods to explore the spatio-temporal relationship between the two. The results showed that： ① From 1990 to 2020, the ecological resilience of Xi'an showed a general decline in time and a low distribution pattern in the middle and northern parts of Xi'an and a high distribution pattern in the south. The ecological resilience of the northern urban center was the lowest, and the distribution area continued to increase. From the perspectives of resistance, adaptability, and resilience, except for adaptability, the distribution pattern was high in the south and low in the north, and the adaptability was low in the southern mountainous area because of the impact of landscape pattern fragmentation. ② From 1990 to 2020, the land use intensity in the northern urban center of Xi'an and the area with intensive human activities continued to increase. In other areas, land use intensity did not change significantly over time, showing a spatial pattern of high in the middle and north and low in the south. ③ The ecological toughness of Xi'an was negatively correlated with land use intensity, and the area where land use intensity had a greater impact on ecological toughness gradually moved southward over time. In 1990, the regression coefficient between ecological toughness and land use intensity was low, and the correlation was not obvious. The concentration of high land use intensity and low ecological toughness was dominant in the central and northern regions, while the concentration of low land use intensity and high ecological toughness was dominant in the southern region and showed a trend of initial decrease and subsequent increase.