ECOLOGICAL RISK ASSESSMENT OF LANDSCAPE PATTERN EVOLUTION IN YULIN CITY, SHAANXI PROVINCE, CHINA

This study aims to provide a reference for risk management and high-quality development of the land ecosystem in Yulin City.The research selects land use data from five periods between 1985 and 2020 in Yulin City, China, and calculates the landscape pattern index using the Fragstats4.2 platform.An ecological risk assessment model is employed to evaluate the ecological risks associated with the evolution of Yulin's landscape patterns.The study found that although the areas of cultivated land and grassland in Yulin varied over time, these two types of land use remained dominant.Grassland had the largest increase in area, expanding by 6290.98 km, while cultivated land had the largest decrease, reducing by 3562.95 km.The landscape ecological risk index in Yulin exhibited a pattern of "increasing, then decreasing, and increasing again," with an overall upward trend.The area of medium and high-risk zones expanded, while the low-risk zone decreased.The landscape ecological risk in Yulin showed a significant positive correlation and demonstrated spatial clustering.High-risk areas were concentrated in the western, southern, and northern parts of Yulin, while low-risk areas were primarily located in the central region.