戴云山不同类型植物群落的物种多样性与稳定性研究

Species Diversity and Stability of Different Plant Communities in Daiyun Mountain

采用物种多样性指数和M.Godron稳定性测定方法研究戴云山自然保护区不同类型植物群落物种多样性和稳定性。结果表明,森林植被多样性普遍较高,灌丛最小。各层次物种多样性变化规律为:灌木层>乔木层>草本层,灌丛多样性是草本层>灌木层。乔木层中马尾松(Pinus massoniana)、黄山松(Pinus taiwanensis)、米槠(Castanopsis carlesii)、毛竹(Phyllostachys edulis)等群落较其他群落相对不稳定,灌丛群落处于稳定状态;总体上,不同类型植物群落基本处于稳定状态,表明保护区植被保护效果较好;从多样性与稳定性关系角度分析,受群落自身性质特点和环境条件的影响,同一群落多样性大小与其稳定性并不存在相关关系。

Diversity and stability of different types of community in Daiyun Mountain Natural Reserve were studied by biodiversity indices and improved M. Godron＇s stability method. The results showed that the diversity appeared higher than others in forest vegetation and shrub layer demonstrated the lowest diversity. The variation rules of species diversity in different levels were shrubr〉 arbor 〉 herbaceous layers,the species diversity of shrub layers appeared herbaceous layer〉 shrub layer. In the arbor layer,Pinus massoniana community, P. taiwanensis community, Castanopsis carlesii community and Phyllostachys edulis community and so on were more unstable than others while shrub communities were stable. Overall, different types of plant communities were stable, which showed that the vegetation in reserve protected more effective. In the views of the relationship between diversity and stability of community, there was no clear correlationship between the stability and diversity because of the community characteristics and environmental conditions.