【摘要】 以1986年、2003年、2021年3期Landsat遥感影像数据和森林资源连续清查数据等为基础数据，从景观要素斑块特征、景观要素空间构型与景观异质性3个方面构建景观格局指数，分析闽江流域森林景观格局的动态变化及影响因素。结果表明：2021年，有林地面积占闽江流域林地面积的68.28%,是流域景观的基质类型；1986—2003年，有林地面积增加了349 134.5 hm~2;2003—2021年，有林地面积增加了392 508.77 hm~2。有林地景观要素边缘密度、内缘比增大，平均形状指数与分维数均减小，斑块边界趋于光滑、简单、有规则。流域斑块总数减小，总周长与斑块平均面积增大，景观破碎化降低，分布趋于聚集。在景观异质性方面，优势度指数与香农多样性指数增大，均匀度指数减小，说明优势景观有林地对整个流域景观的控制作用增大，景观稳定性增强，异质性降低。综上可知，闽江流域森林景观边缘效应增加，破碎度降低，景观生态功能增强，生态环境质量提升。更多还原

【Abstract】 Based on Landsat remote sensing image data of the three issues in 1986,2003,2021 and continuous inventories data of forest resources, this research used landscape pattern index from patch characteristics, spatial configuration of landscape elements and landscape heterogeneity to analyze the dynamic changes and influencing factors of the forest landscape pattern in Minjiang Valley.The results showed that the forest land accounted for 68.28% of the whole region in 2021,which was the base of the valley landscape.From 1986 to 2003,the landscape area of forest land increased by 349 134.5 hm~2,and the area increased by 392 508.77 hm~2 during 2003—2021.The edge density and the ratio of inner edge increased, the average shape index and fractal dimension decreased, and the patch boundary tended to be smooth, simple and regular.The total number of patches decreased, total perimeter and average area of patches increased, landscape fragmentation decreased and distribution tended to gather.In landscape heterogeneity, Shannon dominance index and Shannon diversity index increased, while Shannon evenness index decreased.The dominant landscape forest land controlled the valley landscape, the landscape stability enhanced, and the heterogeneity reduced.In conclusion, the edge effect of forest landscape in Minjiang Valley increased, the fragmentation decreased, the ecological function of landscape enhanced, and the ecological environment quality improved.更多还原