海淀公园木本植物多样性分析

目的]了解海淀公园木本植物多样性。方法]采用随机样方分析法,对北京海淀公园120个样方中的树木种类、数量和规格等进行统计。结果]共调查了21科34属42种1 097棵木本植物,木本植物群落处于发展的中前期阶段,其树龄分布基本呈金字塔类型。木本植物的常绿与落叶种类之比约1∶6,数量之比约1∶3,同种常绿树种的使用重复度较高。乔木层的树种优势度相对灌木显著。乔木的物种多样性整体优于灌木,分布上乔木和灌木的均匀性基本类似。结论]调查结果为城市植物多样性的相关研究和实践工作提供了参考。

Biodiversity Research of Woody Plant on Haidian Park in Beijing

Objective] The aim was to clear biodiversity of woody plant on Haidian Park in Beijing.Method] The survey of woody plant in Haidian Park in Beijing had been carried and 120 samples were measured by random quadrat analysis for the number of species,specifications and so on.Result] It had a total of 21 families,34 genera and 42 species of woody plant,a total of 1 097 strains in Haidian Park.The age of woody plants showed a type of pyramid basically and the woody plants communities were in the development of prometaphase stage.The scale between evergreen plants and deciduous plants was as followed:evergreen∶deciduous =1∶6 in type;and evergreen∶deciduous=1∶3 in number.The degree of repetitiveness of them was high.The importance value difference of trees was relatively largest showed that tree layer species dominance relative shrubs.In terms of species diversity index,trees were overall better than shrubs.Mainly it manifested in two aspects of tree species and number of advantages,but in aspect of the distribution uniformity of trees and shrubs it was similar.Conclusion] This research provides the practical experience and theoretical basis for other relative research of urban plant diversity.