热带地理2025，Vol.45Issue(8)：1358-1372,15.DOI:10.13284/j.cnki.rddl.20250069
道路网对城市群土地利用景观破碎化的影响与空间分异
Spatially Differentiated Effects of Road Networks on Landscape Fragmentation in Urban Agglomerations
摘要
Abstract
Understanding the impact of large-scale road construction on landscape fragmentation in urban agglomerations provides a crucial scientific foundation for coordinating transportation development with the ecological environment and establishing sustainable eco-transportation infrastructure.This study focuses on the Guanzhong Plain Urban Agglomeration(GPUA),a rapidly developing urban cluster in the middle reaches of the Yellow River Basin that has experienced accelerated expansion of high-speed transportation networks.Building upon an analysis of landscape fragmentation patterns,we measured the differential impacts and spatial variations of various road types on fragmentation,offering new insights into the spatial complexity of road network disturbances in regional landscape patterns.Using 2020 highway network and land-use data from the GPUA,we implemented a Geographically Weighted Neural Network Regression(GNNWR)model to systematically investigate geographic patterns of road-induced landscape fragmentation while accounting for non-linear relationships and spatial non-stationarity.This approach further revealed how distinct road types contribute to fragmentation with varying spatial effects.The results demonstrated that,compared with traditional Geographically Weighted Regression and Ordinary Least Squares Regression models,the GNNWR model more accurately captured the influence of roads on landscape fragmentation and spatial heterogeneity.Landscape fragmentation across the study area exhibited a distinct core-periphery differentiation pattern,generally remaining at low levels dominated by low-and medium-low value zones,with striking spatial contrasts emerging between clustered low-fragmentation areas in urbanized plains and highly fragmented mountainous ecological zones.Road hierarchy showed a positive correlation with fragmentation intensity,though expressways exhibited limited impact due to semi-enclosed management systems.Low-grade roads had the most substantial influence on fragmentation in terms of patch dimension and spatial distribution dimension,while high-grade roads significantly affected fragmentation across all dimensions.Notably,the spatial heterogeneity in natural ecological baselines and intensity of human activity drove context-specific interactions between transportation corridors and landscape patterns.These dynamics established distinct spatiotemporal logics within ecological barrier zones,agricultural matrix areas,and urban expansion zones,where road networks interacted with local landscapes through geographically differentiated mechanisms.关键词
道路网/景观破碎化/空间分异/地理神经网络加权回归/关中平原城市群Key words
transportation roads/landscape fragmentation/spatial non-stationarity/Geographically Weighted Neural Network Regression/Guanzhong Plain urban agglomeration分类
天文与地球科学引用本文复制引用
卢进发,李涛,邱孟龙..道路网对城市群土地利用景观破碎化的影响与空间分异[J].热带地理,2025,45(8):1358-1372,15.基金项目
国家自然科学基金项目"城际出行波动的时空分异及溢出效应研究"(42371189) （42371189）
