摘要
采用相邻格子样方法取样数据，应用方差／均值比率法，负二项分布法，Ｄａｖｉｄ和Ｍｏｏｒｅ丛生指数，Ｌｌｏｙｄ平均拥挤指标、聚块指标和分散指标，Ｈｉｌｌ格局强度分析等方法探讨了我国热带珍稀濒危及标志种望天树（Ｓｈｏｒｅａｃｈｉｎｅｎｓｉｓ）种群的带状分布和分层格局，结果表明其带状格局为群聚格局，但群聚程度、聚块尺度和格局强度随年龄增大为“小一大一小”的趋势变化。种群分层格局从幼灌层到乔Ａ层为“群聚一随机一均匀”模式，与密度相关的群聚强度指标随年龄增大而线性下降，与密度无关的群聚强度指标呈“小一大一小”变化模式，但变幅较小。
The contiguous grid quadrats were applied to sampling for field data,V/m ratio t-test,negative binomial distribution, David and Moores'index,index of mean crowding and index of patchiness,index ofdispersion and intensity ofpattern have been used to analyse the zonation pat-tern and stratification pattern of Shorea chinensis population,which is one of the main dominant and rare species of tropical seasonal rain forest,in Bubeng region situated in the south of Yunnan province(about N 21°25'-21°28',E 101°34'-101°52').The results indicate the zonation pattern of the population is of the contagious distribution, and the degree of congrega-tion,the scale of pattern patch and the intensity of pattern are“small-big-small” model with the increase of the population age. The stritification pattern of the population is of the contagious ditribution-random-uniform distribution from sapling to adult tree. The contagious indexes in re-lation to density are linear reduction with the increase of the population age,but the contagious indexes in irrelation to density are“small-big-small″”model and the changes are less.
出处
《云南植物研究》
CSCD
1995年第1期33-40,共8页
Acta Botanica Yunnanica
基金
国家自然科学基金
关键词
望天树
种群
带状格局
分层格局
Shorea chinensis(=parashorea chinensis),Population,Zonation pattern,Stratification pattern
