中文摘要：

运用景观生态学原理、GIS技术和景观格局分析软件Fragstats，选取斑块数、宽块面积、斑块密度、Shannon多样性指数、分维数、聚集度等指标，对沈阳城市森林景观格局进行了分析。结果表明：沈阳三环内城市森林斑块数为42703个，森林面积101．24km^2；斑块数以附属林为主，占总数的65％，斑块面积以生态公益林最大，占总面积的47％；城市森林总体呈现斑块分布不均衡，结构不合理。附属林和道路林的破碎化程度高，分布分散，形状最为复杂；风景游憩林破碎化程度低，自然连接性和聚集度较好。沈阳城市森林整体景观多样性高，均匀度接近于1，优势度较小，表明斑块类型丰富，景观中优势类型不明显，异质性高。

英文摘要：

Patch number, patch area, patch density, Shannon diversity index, fractal dimension index, aggregation index were used to analyse the landscape pattern of urban forests in Shenyang City by the theory of landscape ecology, GIS technique and spatial pattern analysis software Fragstats. Results showed that there was 101.24 square kilometers of urban forests in Shenyang, with a patch number of 42 703. Ecological and public welfare forest occupied 47 percent of the total urban forest area, while subordinated forest contributed the most to patch number, accounting for 65 percent of the total. The distribution of urban forests was not uniform, and the structure was not reasonable. Subordinated forest and road forest exhibited the greatest fragmentation, with a scattered distribution pattern and the most complicated shape. Scenic and recreational forest displayed a low degree of fragmentation and good conditions of natural connectivity and aggregation. Urban forest in Shenyang had high landscape diversity and low dominance index, and its evenness index was approximate to 1, indicating characteristics of abundant patch types and high heterogeneity with no dominant patch type.