基于土地利用变化的曲靖麒麟区生境质量时空演变

Spatial and Temporal Evolution of Habitat Quality in Qilin District, Qujing City Based on Land Use Change

土地利用和生境质量是反应生物多样性与生态价值的重要指标,在社会高速发展的背景下对研究生境质量变化具有重要意义。基于2000~2020年曲靖市麒麟区土地利用数据,利用GIS技术和InVEST模型对曲靖市麒麟区的土地利用变化和生境质量变化进行了定量分析,结果表明:①2000~2020年曲靖市麒麟区土地利用类型呈现建设用的和耕地的扩张,林地草地面积的不断减少的趋势,耕地的扩张是林地减少的主要原因;各地类互相转化以草地、林地转为耕地尤为突出;景观空间构型呈整体化趋势;②2000~2020年研究区生境质量整体下降,整体上呈现西部低东部高的分布情况;且生境退化指数逐年减小,生境退化概率升高。

Land use and habitat quality are important indicators that respond to biodiversity and ecological values,and it is important to study the changes of habitat quality in the context of rapid social development.This paper analyzes the land use and habitat quality changes in Qilin District,Qujing City based on land use data in 2000,2010 and 2020.GIS technology and InVEST model are used,and the results show that:①From 2000 to 2020,the land use types in Qilin District show the trend of expansion of construction land and arable land,and continuous reduction of woodland and grassland area;the conversion of various land types into each other is especially prominent in the conversion of grassland and woodland into arable land;except for construction land,the spatial configuration of various land types shows an overall trend;②The habitat quality in the study area decreased significantly from 2010 to 2020,with the overall distribution of low in the west and high in the east;the habitat degradation index decreased year by year,the probability of habitat degradation increased.