西安理工大学学报2023，Vol.39Issue(4)：464-475,12.DOI:10.19322/j.cnki.issn.1006-4710.2023.04.002
基于遥感生态指数和MCR模型的沙漠丘陵区生态网络构建
Construction of ecological network in desert hilly region based on remote sensing ecological index and MCR model
摘要
Abstract
The unreasonable land use pattern of human beings makes the ecological environment in hilly desert region worse and worse.It is of great significance to construct ecological network in improving the ecological environment quality and maintaining the stability of ecological system.In this paper,Shenmu City of Shaanxi Province was taken as the research unit,with the ecologi-cal environment quality evaluated by using the remote sensing ecological index(RSEI)coupled with greenness,humidity,dryness and heat,and the ecological sources identified based on the evaluation results.Eight resistance factors were selected from terrain factor,vegetation factor,human factor and water resource factor,and the integrated ecological resistance surface was con-structed by the spatial principal component analysis(SPCA).The minimum cumulative resist-ance(MCR)model and gravity model were used to extract potential ecological corridors and nodes in the study area,with the ecological network framework of"point-line-plane"integration constructed.The results showed are as follows:①The mean ecological remote sensing indices of Shenmu City in 2015 and 2018 were 0.473 3 and 0.507 5,respectively.The overall ecological en-vironment quality of Shenmu City was at a medium level with a slight improvement trend,show-ing a spatial distribution characteristic of"poor in northwest and excellent in southeast".②Based on the areas with stable and excellent ecological environment quality during the study period,31 ecological sources were determined,covering a total area of 316.59km2,accounting for 4.15％of the total area of Shenmu City.Most of the ecological sources were concentrated in the southeast of the study area,and the ecological sources were fragmented in the middle and northwest of the study area.The main land types in the source area are grassland,arable land and river.③34 po-tential ecological corridors and 22 ecological nodes were extracted in Shenmu City,with a total length of 634.12km,including 20 important corridors,accounting for 57.58％of the total length,and mainly distributed in the southeast of the study area.Based on regional characteris-tics and research results,the ecological network framework layout of"one ring and four districts"was proposed.The research results can provide scientific reference for Shenmu regional ecological security planning and desert hilly area ecological network construction.关键词
生态网络/遥感生态指数/空间主成分分析/最小累积阻力模型/生态廊道/重力模型/沙漠丘陵区Key words
ecological network/remote sensing ecological index/spatial principal component analysis/minimum cumulative resistance model/ecological corridor/gravity model/desert hilly region分类
资源环境引用本文复制引用
赵菊花,王玉杰,杨永崇,王涛,田苗,邢晓露,郭志炜,苏文壮..基于遥感生态指数和MCR模型的沙漠丘陵区生态网络构建[J].西安理工大学学报,2023,39(4):464-475,12.基金项目
国家重点研发计划项目(2022YFE0119200) （2022YFE0119200）
国家自然科学基金资助项目(42271309) （42271309）
