大明山云贵山茉莉群落物种多度分布的Weibull模型

物种多度分布的分析对于了解群落物种多样性具有重要意义。Weibull模型是拟合物种多度分布的重要模型之一。在采用倍程对物种多度分组的基础上,用Weibull模型分别拟合广西大明山保护区云贵山茉莉群落乔木层、灌木层以及乔木+灌木物种的多度分布,结果三者均符合Weibull分布。由此表明所提出的方法应用于物种多度分布研究是理想的,从而完善了Weibull模型在物种多度分布上的应用。

Weibull model of species abundance distribution of Huodendron biaristatum community in Damingshan Nature Reserve

The analyses of species abundance distribution of plant communities are useful for understanding species diversity.Weibull model is one of the most frequently employed models in fitting species abundance distribution of communities.The species abundance distribution of tree layer,shrub layer,and tree +shrub layer of Huodendron biaristatum community in Damingshan Nature Reserve,Guangxi Zhuang Autonomous Region,was simulated with Weibull model,respectively.The species abundance class was divided by using the octave rather than equidistance method proposed by Wu and Hong in 1997.The results indicated that they all follow Weibull distribution.The approach presented in this paper can be perfected for fitting species abundance distribution with Weibull model.