植物研究2011，Vol.31Issue(5)：603-609,7.
南京方山朴树种群结构与分布格局研究
Population Structure and Spatial Distribution Pattern of Celtis sinensis in Fangshan of Nanjing
摘要
Abstract
Using the contiguous grid quadrats, the population structure and distribution pattern of Celtis sinensis from Fangshan National Geology Park in Nanjing were studied. The results showed that: (1) The size class structure of the population was basically the same, I. E. The seedlings number of I and Ⅱ classes was less, hence, the young seedlings reservoir was very few. The individual distribution of population was focused at Ⅲ and Ⅳ classes, the number overⅣ class reduced gradually. (2) From the static life table of the population, it was found that the mortality of Ⅰ and Ⅱ classes was negative because the seedlings number of I and Ⅱ classes was less, and the mortality of ⅦI and Ⅷ classes was the most. In most of the populations, the young trees were too few to provide enough recruitment, resulting in the ageing phenomena, and the population was declining. ( 3 ) The spatial pattern of seven sampling plots showed aggregative distribution through testing the cluster-intensity co-. Efficient for instance K-value of negative binomial, dispersal index ( C) , index of dispersion pattern (It) , Cass-ie index (Ca) , clumping index (/) , index of mean crowding (m* ) and index of patchiness {m*/m) , but there were certain differences among seven sampling plots about their aggregative degrees.关键词
方山/朴树/种群结构/分布格局Key words
Fangshan/ Celtis sinensis/ population structure/ distribution pattern分类
农业科技引用本文复制引用
金雅琴,李冬林,孙晓龙,刘儒..南京方山朴树种群结构与分布格局研究[J].植物研究,2011,31(5):603-609,7.基金项目
江苏省高校自然科学基金资助项目(07KJD220061) （07KJD220061）
