不同测度指标对莲花山森林植物群落α多样性指数的影响

对莲花山国家级自然保护区主要森林植物群落,分别以个体数、重要值、总和优势度为测度指标计算了9种物种多样性指数,并进行了对比分析。结果表明:对于该区森林群落的乔木层和灌木层,以重要值为测度指标优于以个体数和总和优势度为指标测度的群落物种多样性指数;乔木层丰富度指数(R1、R2)对测度指标比较敏感,灌木层和草本层Alalato均匀度指数(Ea)对测度指标最敏感;灌木层以重要值测度的Shannon-Winener多样性指数(H)大于其它指标测度的H值,草本层以盖度指标测度的Shannon-Winener多样性指数(H)大于以重要值为指标计算的H值。

Effects of different measurement criteria on α-diversity indexes of forest plant communities in the Lianhua Mountains

9indexes of species diversity, based on abundance, importance value and dominance value were used respectively to analyze species diversity of forest plant communities in the Lianhua Mountain National Nature Reserve. The results indicate as follows: diversity indexes of tree layer and shrub layer based on importanc value have more ecological significance than that based on abundance and dominance value; Margalef index and Menhinick index of tree layer have the closest relationship to measurement criteria, and Alatato index of shrub layer and tree layer have the closest relationships to measurement criteria; Shannon-Winener index of shrub layer based on importanc value shows higher diversity level than the others, and Shannon-Winener index of herb layer based on coverage shows higher diversity level than that of importance value.