木里蝶类多样性的研究

THE BUTTERFLY DIVERSITIES IN MULI,SICHUAN PROVINCE

研究了处于原始状态环境的蝶类多样性。种-多度曲线拟合于对数级数模型，物种少而生境不相互重叠，优势种得到大的发展。多样性指数与海拔高度不相关（r=-0．2968），不同高度都有适宜或不适宜蝶类的生境。等级多样性2．998～8．313．多样性指数与均匀度不相关（r=0．2566，p＞0．05），与丰富度相关（r=0．8506，p＜0．01）。群落间相似性系数0．000～0．061。二维极点排序图及相关系数（0．2838）说明木里蝶类群落组成变化在本文涉及因素影响下是无序的。这些结果表明蝶类对微环境的敏感性及其表现出来的高度变化。

This study was conducted in Muli county, from July 3 to October 8 in 1992. Muliis located at middle section of eastside in Hengduan Mountains, 27°40'~29°10'N, 100°03' ~101°40'E, the relative altitude is above 2000 m, climate and vegetation are complex andchangeable at horizental level, and it possess obvious vertical zone. There are unpoleutedprimeval evergeen forest. The survey was carred out by sixteen types of habitats as fldri-plainfarmland, hillside farmland, residence farmland, alpine farmland, flnd-plain lawn, hillsidelawn, alpine lawn, flood-plain bush, hillside bush, alpine bush, path among broadleavedforest, broadleaved forest, mixed forest, bush below conifer forest, bush among coniferforest, and conifer forest.The curve of species-abudance of butterfly is fitted to niche pre-emption hypothesis inMuli. The species is less and habitats are not overlap each other. The indices of butterfly di-versity do not change with elevation in Muli (r= 0. 2968. p>0. 05)which have suitable ornonsuitable habitats to butterfly. No correlations have been found between indices of diversityand evenness(r= 0. 2566, p>0. 05), and indices of diversity with richness is correlated (r=0. 8506, p<0. 01 ) The similarity among community of butterfly is high, 0.000~0.061.The result of community ordination is nonordered by various combination between each vegeta-tion and each geomorphic types. A foresaid results shown susceptibility of butterfly to mi-croenvironment.