摘要
干扰对森林群落结构有直接的影响,不同干扰类型和强度下森林群落结构特征存在明显区别。本文以林芝地区色季拉山广泛分布的川滇高山栎群落为研究对象,选取火烧、采伐、放牧、无干扰几种条件下的样地类型对高山栎群落结构特征进行研究。结果表明:不同干扰类型下群落的物种丰富度指数、群落郁闭度、灌木和草本盖度、生物多样性指数等均存在较大差异。无干扰条件下各指数一般比干扰条件下的高,而对于放牧迹地上总物种丰富度指数和草本层多样性指数都远大于三种群落类型,主要原因是放牧控制了群落中的优势物种,增加了群落的物种多样性。
Disturbance on forest community structure has a direct impact.It is an obvious difference that Characteristics of community structure of forest under different disturbance types and intensities.It is studied that Quercus aquifolioides communities of Sejila mountain spreading widely distributed in the nyingchi area in this paper.The present paper is aimed to study the characteristics of community structure of Quercus aquifolioides under selecting fire,logging,grazing,undisturbed sample type several conditions.The results showed that the community of species richness index,shade aensity and shrub and herb cover,biodiversity indicators were a big difference under different disturbance types of communities.Non-interference condition index was generally higher than that under interference conditions,and the ground total species richness and herbal layer diversity indices under grazing traces were much larger than that in the three community types,mainly due to grazing control of dominant species in the community and increasing community species diversity.
出处
《西南农业学报》
CSCD
北大核心
2013年第5期2043-2047,共5页
Southwest China Journal of Agricultural Sciences
基金
西藏大学农牧学院青年基金"不同干扰类型下川滇高山栎种群空间结构及格局研究"
关键词
川滇高山栎
干扰
群落结构
Quercus aquifolioides
Disturbance
Community structure
