吉阳镇植物群落特征及其物种多样性分析

通过野外样方调查方法分析建瓯市吉阳镇植物群落物种组成、种类，利用重要值计算植物群落的物种丰富度指数、多样性指数、均匀度指数、优势度指数，并分析了群落整体及其不同层次物种多样性的差异。研究表明：调查的10个样方中共有59科108属209种，物种组成以蔷薇科、壳斗科、山茶科、樟科、杜鹃花科、豆科为主，植物种类以马尾松、黄山松、米槠、木荷、甜槠、石栎为主。吉阳镇植物群落结构复杂，物种组成种类、数量较多，群落总体物种多样性水平较高。从多样性各指数值来看，Margalef丰富度指数变化范围为1.435～5.334，Shannon-Winner优势度指数变化范围为1.141～2.525，Simpson多样性指数在0.396～0.781范围内波动，Pielou均匀度指数变化范围为0.515～0.798。

Characteristics and Species Diversity of the Plant Communities in Jiyang Town

This paper analyzed the species composition and the species by field survey methods in Jiyang town of Jian′ou city,with significant values counted the species richness,the diversity index,the evenness index and the dominance index of species composition,analyzed the species diversity of communities and communities at different levels. The result showed that quadrats contain 60 sections,111cases and 209 kinds. Species compositions are mainly to Rosaceae,Fagaceae,Theaceae,Lauraceae and Leguminosae. Plant species are mainly to Taiwanensis,Pinus massuniana,Lithocarpus glaber,Schima superba and Castanpsis eyrei. The community structure is complex. The species and quantity of species composition are more. The level of species diversity is high. From the point of view diversity index values,Richness index varied from 1.435 to 5.334,the Shannon-winner diversity index varied from 1.141 to 2.525,Simpson diversity in-dex varied from 0.396 to 0.781,Pielou diversity index varied from 0.515 to 0.798.