鄱阳湖生态经济区建设用地扩张对耕地景观破碎化的影响  

The impact of construction land expansion on the landscape fragmentation of cultivated land in the Poyang Lake ecological economic zone

作　　者：郑希平 陈竹安[1,2,3] 危小建 ZHENG Xiping;CHEN Zhu′an;WEI Xiaojian(School of Surveying and Geoinformation Engineering,East China University of Technology,Nanchang 330013,China;Key Laboratory of Mine Environment Monitoring and Improving around Poyang Lake of Ministry of Natural Resources,East China University of Technology,Nanchang 330013,China;Jiangxi Province Engineering Research Center of Surveying,Mapping and Geographic Information,Nanchang 330013,China)

机构地区：[1]东华理工大学测绘与空间信息工程学院,南昌330013 [2]东华理工大学自然资源部环鄱阳湖区域矿山环境监测与治理重点实验室,南昌330013 [3]江西省测绘地理信息工程技术研究中心,南昌330013

出　　处：《农业资源与环境学报》2024年第2期280-291,共12页Journal of Agricultural Resources and Environment

基　　金：东华理工大学地质资源经济与管理研究中心开放基金项目(22GJDGL03);江西省研究生创新专项基金项目(YC2023-S585);国家自然科学基金项目(51708098)。

摘　　要：为分析鄱阳湖生态经济区耕地景观与建设用地扩张之间的关系,利用形态学空间格局分析法研究2000-2020年耕地景观破碎化的形态学特点,同时运用外溢效应分析、景观格局指数分析、地理加权回归等模型方法,探究建设用地扩张对耕地景观破碎化的影响。结果表明:2000-2020年间耕地景观破碎化程度加强,核心区面积减少强度由1.33%提高到6.27%,并表现出由平原地区向山地丘陵区加强的地域性差异,且建设用地扩张会导致耕地景观破碎化;建设用地占用耕地的面积由268.60 km2增加到1 003.26 km2,主要发生在路网成熟的地区;建设用地扩张对耕地的外溢效应逐渐增强,在路网成熟地区更显著;建设用地扩张对耕地景观破碎化有较强的正向影响,道路建设对这种影响有强化作用,同时,耕地景观破碎化表现出随道路缓冲距离的减小而加强的阶梯性差异。研究表明,耕地景观破碎化程度受地形和建设用地扩张的影响显著,耕地景观破碎化现象主要发生在地势起伏大或建设用地密集、路网成熟的地区。This study took the Poyang Lake ecological economic zone as the research area,and using morphological spatial pattern analysis,explored the morphological spatial characteristics of the fragmentation of cultivated land from 2000 to 2020.Furthermore,based on land use transition matrix methods,spillover effect analysis,and landscape pattern index analysis,this study analyzed the spatiotemporal characteristics in which construction land expands by occupying cultivated land as well as the spatiotemporal response of the landscape pattern of the cultivated land.From 2000 to 2020,the degree of cultivated land fragmentation gradually strengthened and the reduction rate of the core area increased from 1.33%to 6.27%.At the same time,it was shown that the regional difference was gradually strengthened from the plain around Poyang Lake to the mountainous and hilly areas,and the expansion of construction land led to the fragmentation of cultivated land.From 2000 to 2020,the area of cultivated land occupied by construction land increased from 268.60 km2 to 1003.26 km2,and mainly occurred in areas with a mature road network.The spillover effect of construction land expansion is gradually increasing,and it is more significant in areas with a mature road network.The expansion of construction land has a strong positive effect on cultivated landscape fragmentation,and road construction strengthens this effect.Meanwhile,cultivated landscape fragmentation shows a greater difference with the reduction of road buffer distance.The degree of cultivated land fragmentation is significantly affected by topography and construction land expansion.In addition,the fragmentation of cultivated land mainly occurs in areas with large relief or dense construction land and a mature road network.

关 键 词：景观破碎化 耕地 形态学空间格局 扩张 建设用地 道路网络 景观格局指数 

分 类 号：F301.21[经济管理—产业经济] F323.211