叶山林场次生阔叶林乔木树种多样性及种间关联分析

通过铜陵叶山林场次生落叶阔叶林样地调查,对乔木层物种丰富度指数、植物多样性指数、Pielou均匀度指数、生态优势度指数、重要值和种间关联进行分析.结果表明,在12块样地中共有乔木树种19种,平均植物多样性指数、均匀度指数和生态优势度指数分别为1.25、0.70和0.37.优势树种麻栎重要值为105.3,伴生树种化香、枫香和国槐重要值分别为65.1、36.3和18.6.该森林类型为麻栎落叶阔叶混交林.19个树种之间共存在171对相关,但正关联树种对少于负关联树种对,正负关联比小于1,说明该群落类型还处于演替阶段,即由落叶阔叶林向常绿与落叶阔叶混交林过渡阶段.

Analysis of tree species diversity and interspecific association of tree layer in secondary broad-leaved forest in Yeshan forest-farm

Based on the investigation of plots, the indexes of species richness, plant diversity, Pielou evenness and ecological dominance, important value and interspecific association of tree layer in secondary broad-leaved forest were calculated and analyzed in Yeshan forest-farm of Tongling county. The results showed that there are 19 tree species in the 12 plots. Mean indexes of plant diversity, evenness and ecological dominance are 1.25, 0.70 and 0.37, respectively. The important value of dominant tree, Quercus acutissima, is 105.3, and the companion tree species, Platycarya strobilacea, Liquidambar formosana and Sophora japonica, are 65.1, 36.3 and 18.6, respectively. This forest type is Quercus acutissima deciduous broadleaved mixed forest. One hundred and seventy-one tree species coexist correlation among 19 tree species, but the pairs of the positive associated tree species are less than the negative ones. The ratio between the positive and negative association is less than 1, which mean that this community type is still in successive stage, namely the transition stage from the deciduous broadleaved forest to the evergreen and deciduous broadleaved mixed forest.