摘要
为了解黔中喀斯特山地孤岛生境植被演替过程中物种组成及物种多样性,采用以空间序列代替时间序列的研究方法对不同类型孤岛进行样方调查,对群落物种组成及物种多样性进行了分析。结果表明:喀斯特山地孤岛生境植被演替过程中,随着演替的进展,群落高度逐渐增大,阴性植物逐渐迁入,每个阶段木本植物都有不同的优势种。草本层的物种丰富度在灌草丛阶段最大,然后逐渐减小;灌木层物种丰富度在灌木林阶段最大。草本层的多样性指数逐渐递减,均匀度指数在灌木林阶段最大;灌木层的多样性指数在灌草丛阶段最小,其次是乔木林阶段,在灌木林阶段最高,均匀度指数在灌草丛最高;灌木层的生态优势度在乔木林最大,乔木林中乔木层的优势度约为灌木层的3倍。
In order to understand community composition and species diversity in different island habitats on karst mountain in central Guizhou, a quaclrat survey of a space series method for a time course method was conducted in different island habitats. Community species composition and diversity were analysed. Results indicated that heliophilous plant was gradually replaced by shade-tolerance plant in vegetation with gradual increase of community height and successional process of karst mountain. There were different dominant species of woody plants in every stage. Species richness of herb layer in shrub-grassland is the largest, then it gradually reduced; species richness of shrub layer in shrub was the largest. Simpson＇ s diversity index and Shannon-Wiener index of herb layer gradual ly decreased. Evenness index of herb layer in shrub is the largest. Simpson＇ s diversity index, Shannon-Wiener index of shrub layer in shrub-grassland is the lowest and the next was arbor forest. The highest was in shrub. Evenness index is the largest in shrub-grassland. Ecological dominance of shrub layer was the largest in arbor forest. Ecological dominance of arbor layer was three times as much as shrub layer in arbor forest.
出处
《贵州科学》
2011年第4期23-28,共6页
Guizhou Science
基金
贵州省林业厅科学技术研究项目(2007-05):贵州省天保工程区喀斯特山地生境孤岛植物多样性分布特征及保护方案研究
关键词
黔中
喀斯特
孤岛生境
群落组成
物种多样性
central Guizhou, karst, island habitat, community composition, species diversity
