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利用物种丰富度、多样性、均匀度等物种多样性指标,对邛崃天台山的鹅掌楸人工林和通江县海鹰寺林场的鹅掌楸天然林群落的物种多样性进行了调查研究。结果表明:1)鹅掌楸两种不同起源林分群落中合计有31种植物,隶属于26科30属,其中蕨类植物3科3属3种,裸子植物3科3属3种,被子植物20科24属25种,天然林群落的物种丰富度高于人工林;2)群落区系属级成分中,北温带分布类型的属占20.0%,其次是世界分布类型和旧世界热带分布类型各占13.33%,热带亚洲和热带美洲洲际间断分布类型和东亚-北美间断分布类型的属各占10.0%;3)在不同起源的鹅掌楸林分中,天然林群落乔木层、灌木层与草本层的物种丰富度和物种多样性指数均高于人工林群落;4)在同一林分群落中,各物种多样性指数在群落层次间变化幅度,均为草本层>灌木层>乔木层。
Based on the indices of species richness, diversity and evenness, the species diversity of natural forests of Liriodendron chinense in Tamatakei of Tamarix and Lihayingchu forests in Tongjiang County were studied. The results showed that: 1) There are 31 species in two different origins of Liriodendron, belonging to 26 genera and 30 genera, including 3 species of 3 genera and 3 families of ferns, 3 species of 3 genera and 3 species of gymnosperm, There are 25 species in 20 genera and 24 genera in 20 families, and the species richness of natural forest community is higher than that of plantation. 2) Among the genus-level components of the community, the genus North Temperate distributes 20.0%, followed by the world distribution type and Old World tropical distribution Each accounting for 13.33%, accounting for 10.0% of the discontinuous intercontinental distribution types in tropical Asia and tropical Americas and discontinuous distribution types in East Asia-North America. 3) In the different origins of Liriodendron junctatum, the arbor layer and shrub layer And species diversity of herb layer were higher than that of plantation community. 4) In the same stand community, the diversity of each species diversity in the community level were in the order of herb layer> shrub layer> tree layer .