安徽皇藏峪自然保护区青檀种群的初步研究

A Preliminary Study on Populations of Pteroceltis Tatarinowii in Huangcangyu Nature Reserve in Anhui Province

皇藏峪自然保护区青檀林可分为青檀纯林和混交林两种类型.在青檀纯林中乔木层和更新层只有青檀一个物种,郁闭度较低;而在其混交林中,可明显分为乔木层、灌木层和草本层,物种丰富度和群落郁闭度较高.另外,在其混交林中,各个层次的优势种明显.青檀是乔木层优势树种之一,其重要值达66%.从青檀种群内分布型指标(方差/平均数)来看,种群个体基本为集群分布.各种群的年龄结构反映保护区内青檀种群是增长型种群.

The pteroceltis tatarinowii forest of Huangcangyu nature reserve could be divided into pure pteroceltis tatarinowii forest and mixed forest. Arborous layer and innovation layer of the pure pteroceltis tatarinowii forest only had one species pteroceltis tatarinowii, and its shade density was relatively low. But the mixed forest could be divided into arborous layer, shrub layer and herb layer, species diversity and shade density was relatively high. In the mixed ibrest, dominant species of each layer were evident. Pteroceltis tatarinowii, one of dominant species of arborous layer had important value （66%）. From internal distribution pattern index in populations of pteroceltis tatarinowii, which demonstrated that pteroceltis tatarinowii populations were dumped dispersion. Based on age structure, pteroceltis tatarinowii populations were expanding populations.