极小种群植物玉龙蕨的群落调查及生态位分析

Investigation of Natural Population and Niche Analysis for Sorolepidium glaciale,a Plant Species with Extremely Small Populations

为了更加全面的了解掌握极小种群野生植物玉龙蕨的群落构成及特征,通过对云南省迪庆州玉龙蕨自然居群5个样地的调查统计,分析了其群落特点、区系特征、生态位宽度与生态位重叠值.结果表明:(1)玉龙蕨有4种生活群落类型;(2)群落植物资源相对稀少,共有维管束植物34科53属62种;(3)群落种子植物区系构成以温带分布属为主,占总属数的78.43%;(4)玉龙蕨生态位宽度相对适中,与珠芽蓼的生态位重叠值最大.

In order to better understand the population structure and character of Sorolepidium glaciale ,a plant species with extremely small population.In this paper,the five natural sample zones of S. glaciale were investigated.The study mainly analyzed the structure characteristics,flora characteristics,the niche width of populations and the niche overlap interpopulation.The results showed that：① S. glaciale had four kinds of population structures;②The species resources of the community were relatively rare. There were 60 species of native vascular plants,belonging to 53 genera and 34 families.③The flora composition of angiosperm was mainly temperate distribution type that occupied 78.43%.④Niche width of S. glaciale was comparatively moderate and the maximum value of niche overlap was Polygonum viviparum.