云南糯扎渡自然保护区热带林群落物种多样性相似性研究

利用Jaccard相似性指数,对云南糯扎渡自然保护区8种热带林群落物种多样性沿群落结构组合梯度的分异情况进行了分析。结果表明:①在第1个群落结构组(仅含乔木层)中,28对比较群落有8对为完全不相似,有20对为极不相似;在第3个群落结构组(含乔木层和灌木层)、第2个群落结构组(含乔木层、灌木层和草本层)和第4个群落结构组(含乔木层、灌木层、草本层和藤本层)中,28对比较群落均为极不相似。说明各种热带林群落之间具有较大的生境差异性,且在糯扎渡自然保护区具有较高的热带林生境多样性。②4个群落结构组对群落相似性的贡献从大到小的排序是第2群落>第3群落>第4群落〉第1群落结构组,即在分析热带林群落的相似性时,仅考虑乔木层的物种多样性是不够的,还应综合考虑灌木层、草本层和藤本层的物种多样性,这样才能全面反映群落的特征。

Comparability of Species Diversity of Tropical Forest Communities in Nuozhadu Nature Reserve,Yunnan Province

This paper analyzed the Gradient Differentiation of species diversity of 8 tropical forest communities(Form.Terminalia myriocarpa-Lithocarpus grandifolius,Form.Terminalia myriocarpa-Phoebe puwenensis,Form.Pometia tomentosa-Calamus wailing,Form.Alangium chinense-Styrax sp.-Michelia floribunda-Sapium baccatum,Form.Acronychia pedunculata-Streblus indica-Rapanea yunnanensis,Form.Anogeissus acuminata var.lanceolata-Eriolaena sp.-Dendrocalamus membranaceus,Form.Lagerstroemia intermedia-Bauhinia variegata var.candida,and Form.Quercus kingiana-Eriolaena spp.-Phyllanthus emblica) in relation to community structure groups in Nuozhadu nature reserve in Yunnan Province using Jaccard comparability index.The results were as follows:①In 28 comparable tropical forest communities,8 communities belong to non-comparability and 20 communities belong to very low comparability in the first community structure group(only arbor layer);28 communities belong to very low comparability in the second community structure group(arbor layer and shrub layer),the third community structure group(arbor layer,shrub layer and herbage layer) and the fourth community structure group(arbor layer,shrub layer,herbage layer and liane layer).This indicated that Nuozhadu nature reserve has all kinds of habitat diversity of tropical forest communities.②The function of 4 community structure groups for the comparability of species Diversity of tropical forest communities increase in the order of the second community structure group,the third community structure group,the fourth community structure group and the first community structure group.This indicated that it is necessary that integrated analyzed the species diversity of arbor layer,shrub layer,herbage layer and liane layer.