“天保工程”下锐齿栎群落物种多样性及其稳定性

通过对小陇山"天然林保护工程"中锐齿栎群落的物种多样性及稳定性调查,结果表明:①研究区锐齿栎群落乔木层丰富度指数为10.6,Shannon-Wiener指数为1.4222,Pielou指数为0.5450,Simpson指数为0.4134,显示了暖温带南部阔叶落叶林物种多样性的特点,和介于亚热带常绿阔叶林和暖温带北部阔叶落叶林之间群落多样性的地域特征;②锐齿栎群落物种多样性空间分布具有明显的阴、阳坡分布模式,且阴坡丰富度、多样性和均匀度指数均大于阳坡的相关指数;③锐齿栎群落物种多样性时间分布具有明显的发育阶段模式。随着群落的发育,多样性和丰富度指数的变化规律相似,均匀度、优势度的变化各有特点,显示了不同的生态学意义;④以锐齿栎为建群种的锐齿栎群落处于稳定状态。与早期研究相比,验证了研究区"天然林保护工程"实施的科学性和成效性。

Quercus aliena var. acuteserrata Community Biodiversity and Stability Based on the Implementation of Tianbao Project

Based on the implementation of Tianbao Project,the paper gave an investigation on the species diversity and stability of the quercus aliena var.acuteserrata community.The conclusions were as follows:(1) Patrick abundance index was R=10.6,Shannon-Wiener index was H′=1.4222,Pielou index was Jsw =0.5450,Simpson index was C=0.4134.These datas showed the southern warm temperate zone's biodiversity characteristic as well as the regional features,which was between subtropical evergreen broad-leaved forest and broad-leafed deciduous forest in the north of warm temperate zone.(2)There were two distributed patterns of species diversity on M t.Xiaolong's sunny slope and shade slope.There were bigger diversity,evenness and richness on shade slope than that on the sunny slope.(3)As the development of community,diversity and abundance index had the similar variation.Conversely,that of evenness and dominance was different.It showed the different significance on ecology.(4) The quercus aliena var.acuteserrata community was built with quercus aliena var.acuteserrata species,which belonged to was stable.Compared with the earlier studies,the results proved that the implementation of Tianbao Project was scientific and effective.