关键词: 土地利用变化, 生态安全评价, PSR模型, 张家界市

Abstract: In order to reveal the characteristics of land use change and its ecological security status in Zhangjiajie City, and promote the construction of regional ecological civilization, the land use transfer matrix and single dynamic degree of land use were used to analyze the characteristics of land use change in Zhangjiajie City from 2010 to 2020 and the PSR model was used to select 17 indicators to establish the evaluation index system of land ecological security in Zhangjiajie City to evaluate the land ecological security of Zhangjiajie City from 2011 to 2021. The results showed that from 2010 to 2020, cultivated land, forest land, and grassland were the main land use types in Zhangjiajie City, while water bodies and construction land accounted for a relatively small proportion;from 2010 to 2020, there were significant changes in land use in Zhangjiajie City. In addition to an increase in forest and construction land areas, there was a varying degree of reduction in arable land, grassland, and water bodies. From 2011 to 2021, all subsystems of land ecological security in Zhangjiajie City showed an overall upward trend, with the comprehensive index of land ecological security rising from 0.324 4 to 0.744 2. The land ecological security level experienced a changing process of unsafety-critical safety-relative safety, and the land ecological environment problems were improved. However, there was still a certain gap from the ideal safe state. In future ecological environment work, targeted measures should be taken to address the factors that hinder regional ecological security and fill the gaps.

Key words: land use change, ecological security evaluation, PSR model, Zhangjiajie City