辽中南城市群城市化及生态效应

20世纪90年代以来,我国进入快速城市化阶段,城市化引发的一系列环境问题不容忽视。本研究基于1995—2020年夜光遥感数据和土地利用数据,提取灯光指数测度辽中南城市群城市化水平,借助InVEST模型评价生境质量,并使用相关性分析方法和地理加权回归模型探讨辽中南城市群城市化水平与生境质量的关系。结果表明: 灯光指数在1995—2020年间增加了0.14,城市化水平不断提高,且呈现东低西高的格局;生境质量下降0.005,呈东高西低的格局,生态环境变差;辽中南城市群城市化水平与生境质量呈现显著的空间负相关关系,且城市化水平对生境质量的负面影响逐渐减少。为了缓解城市化带来的生境退化,实现区域社会经济协调可持续发展,迫切需要采取一系列措施,如:划定生态保护红线、提高土地集约利用度、划定城镇边界、促进区域一体化协调发展等。

Urbanization and ecological effect in mid-southern Liaoning urban agglomeration,China

China has entered the stage of rapid urbanization since the 1990s, resulting in a series of environmental problems. Based on the nighttime light remote sensing data and land use data from 1995 to 2020, we extracted the compound night light index (CNLI) to measure the urbanization level of mid-southern Liaoning urban agglomeration, evaluated habitat quality by InVEST model. We examined the relationship between urbanization level and habitat quality in mid-southern Liaoning urban agglomeration by using the correlation analysis method and the geographic weighted regression model. The results showed that CNLI increased by 0.14 from 1995 to 2020. The urbanization level increased continuously, with a pattern of “low in the east and high in the west”. The habitat quality decreased by 0.005, showing a pattern of “high in the east and low in the west”. The ecological environment became worse. There was a significant negative spatial correlation between urbanization level and habitat quality in mid-southern Liaoning urban agglomeration. The negative impact of urbanization level on habitat quality gradually decreased. In order to alleviate habitat degradation caused by urbanization and realize the coordinated and sustainable development of regional social economy, it was urgent to take a series of measures, such as delimiting the ecological protection red line, improving the intensive use of land, delimiting the urban boundary, promoting the coordinated development of regional integration.