河南小秦岭自然保护区西曼林区样地主要物种的空间分布格局  

Major species spatial distribution pattern of the transit station plots in Henan Xiaoqinling Nature Reserve

作　　者：王海亮 庄静静[2] 张凯 

机构地区：[1]河南小秦岭国家级自然保护区管理局,河南灵宝472500 [2]河南农业大学生命科学学院,河南郑州450002

出　　处：《河南农业大学学报》2012年第4期385-391,共7页Journal of Henan Agricultural University

基　　金：河南省公益林建设项目

摘　　要：为了探究河南小秦岭自然保护区内种群空间分布特征,在保护区内立了一块1 hm2的森林动态监测样地,逐一测量并记录了样地中所有胸径(DBH)≥1 cm的树木的种类、高度、胸径、冠幅、株数等因子,以1 hm2样地调查数据为基础,运用负二项参数、扩散系数、扩散型指数、CA指数、丛生指标、聚块性指数、Poisson分布和负二项分布的拟合检验等8项指标,对群落的分布类型、聚集强度及其空间格局进行研究.通过对重要值前6位物种的径级结构、空间分布以及聚集强度的详细分析来了解小秦岭自然保护区内物种的空间分布特征.结果表明,从重要值中,漆(Toxicodendron vernicifluum)在样地中的重要值最大,但它的物种数并不是最多的,其次是锐齿槲栎(Quercus aliena),它的重要值在样地中位于第2位,位于第3位的是葛萝槭(Acer grosseri);从径级分布中可以看出,样地中大胸径的树木较少,大多数是中小型;在空间分布格局中可以看出,大胸径的树木因为较少大多数是随机分布,中胸径的树木相对较多,多呈均匀分布,也有少量集群分布或随机分布,而小胸径的树木最多,几乎呈集群分布.In order to explore the major population spatial distribution characteristics in Xiaoqinling Nature Reserve, a 1 hm2 forest dynamic monitoring plot in protected area was constructed to, measure and record the species of trees in plots whose diameter at breast height （DBH） I〉 1 cm, survey on height, diameter at breast height, crown diameter, number of tree factors. Based on a 1 hm2 survey da- ta, using the negative two parameters, the diffusion coefficient, diffusion index, CA index, clustered index, the patchiness index, Poisson distribution and negative binomial distribution fit test were con- ducced to study the community distribution types, gathered strength and its spatial pattern. This paper, through studying the important value of six species, diameter class, spatial distribution, and gathered strength understanding aims to analyze the species spatial distribution characteristics in Xiaoqinling Na- ture Reserve. The results showed that from the important value, Toxicodendron vernicifluum has the most important value in the plot, bat the number of species is not the most. Quercus aliena is of the second important value in the plots. Acer grosseri is the third; From the distribution of diameter clas- ses, we can see fewer large diameter at breast height of trees in the plots, but most are small and medi- um-sized. In the spatial distribution pattern, large DBH trees are randomly distributed because of the less number, the medium-sized number relatively more than the large, most are evenly distributed, some clumped or randomly distributed, but the small DBH trees showed a clumped distribution.

关 键 词：空间分布 格局 聚集 随机 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]