生态环境学报2023，Vol.32Issue(10)：1750-1759,10.DOI:10.16258/j.cnki.1674-5906.2023.10.004
基于多尺度情景的闽三角地区林地生态网络构建
Construction of Forest Ecological Network in the Min River Delta Based on Multi-scale Scenarios
摘要
Abstract
This study explores the construction of regional ecological networks under different scale scenarios,reveals their spatial distribution and characteristic differences,and provides a theoretical basis for regional ecological planning and biodiversity protection.Taking the Fujian delta region as an example,we used Morphological Spatial Pattern Analysis(MSPA)to explore the dynamic changes in forest landscape structure in 2000,2010 and 2020.We set up multi-scale scenarios based on animal migration characteristics(small[habitat area 60 hm2,dispersion distance 10 km],Medium[300 hm2,30 km],large[500 hm2,60 km],and ultra-large[1000 hm2,100 km]).We used Linkage Mapper to extract ecological corridors and ecological nodes under different scale scenarios,and analyze the applicability and characteristics of the ecological network.The results show 1)in the past 20 years,the proportion of the core area of forestland in the Fujian delta region has decreased by 0.63%,and the degree of fragmentation has increased;the core area is mainly distributed in the mountainous and hilly areas in the north,northwest and southwest,while the core area in the eastern coastal area has fewer blocks.2)In the past 20 years,both the modified betweenness centrality index and the plaque importance index have increased,indicating that the ecological source connectivity in the Fujian delta region has increased,and both indices increased with the increase of scale.This shows that the larger the scale,the higher the connectivity of ecological source areas.3)The ecological network was constructed using land use data in 2020.The extracted ecological source areas under small,medium,large,and ultra-large scale scenarios were 1.044×104 km2,1.005×104 km2,0.989×104 km2 and 0.964×104 km2,respectively;there were 1006,305,208 and 118 ecological corridors,showing apparent spatial differences in ecological source areas and corridors under different scale scenarios.Larger scales corresponded to smaller source areas and corridors in dense central areas of built-up areas.There were obvious differences in the connectivity of ecological networks under different scale scenarios.The network closure,connectivity,and complexity of the ecological network in large-scale scenarios were better than those at other scales.4)We identified 233,79,70 and 35 ecological nodes under small,medium,large,and ultra-large scale scenarios,respectively;as the scale increases,the number of ecological nodes decreases and they become easier to repair,indicating that small-scale species are more susceptible to the impact of human activities.关键词
多尺度情景/生态网络/形态学空间格局分析(MSPA)/生态廊道/生态节点/闽三角地区Key words
multi-scale scenarios/ecological network/Morphological Spatial Pattern Analysis(MSPA)/ecological corridor/ecological node/Fujian delta region分类
资源环境引用本文复制引用
肖瑶,刘渺渺,梁冠敏,胡喜生,林森,巫志龙..基于多尺度情景的闽三角地区林地生态网络构建[J].生态环境学报,2023,32(10):1750-1759,10.基金项目
国家自然科学基金项目(31971639) （31971639）
福建省自然科学基金项目(2019J01406) （2019J01406）
福建省工程索道工程技术研究中心开放课题基金项目(ptjh16006) （ptjh16006）
