宁夏中卫山羊核心产区生物多样性研究——植物群落相似性及群落聚类特征  

STUDIES ON BIODIVERSITY IN THE CORE REGION OF ZHONGWEI GOAT IN NINGXIA --THE CLUSTER ANALYSIS AND SIMILARITY OF PLANT COMMUNITIES

作　　者：尚占环[1] 姚爱兴[1] 郭旭生[1] 

机构地区：[1]宁夏大学草业科学研究所,宁夏永宁750105

出　　处：《宁夏农学院学报》2002年第4期23-26,共4页Journal of Ningxia Agricultural College

基　　金：国家自然科学基金资助项目 (3 9960 0 5 2 );教育部骨干教师项目

摘　　要：采用Jaccard指数 ,Sorenson指数和Mountford指数等三个相似性指数及系统聚类分析对不同样地的植物群落进行分析。结果表明三个指数在环境梯度上没有反应出物种的明显变化特征 ,原因是由于干扰 (放牧 )使整个环境梯度上系统的时间、空间和种间相悖 ,结构错乱。聚类分析能够从群落结构上分析群落之间的关系。分类结果表明 7个样地可以分为三类 :(1)以莎草科植物为优势种的群落 ;(2 )以禾本科植物为优势种的群落 ;(3)以豆科小灌木为优势种的群落。笔者指出在进行草地生态系统多样性保护的同时也对畜牧种质资源进行了保护 。The comparabilites of plant community on the sampling pastrues at different latitude in the Xiangshan mountain area of Ningxia were analyzed by the application of Jaccard index, Sorenson index, Moutford index and system clustering methods. The results showed that three indexes did not reflect the characteristics of species' change in all gradients of environment significantly. The reason is that the interference (grazing) so heavy that breakdown the natural distribution of species, and result chaotically of the structure of system in scale of time, space, species. The systematic cluster analysis can reveal the relation between plant communities form the form of community. All samples can be classified three kind of formation. That are:(1) the dominant species is sedge family plants (Cares stenopylloides); (2) The dominant species is graminaceous plants(Cleistogenes caespitosa, Eragrostis poeides); (3)The dominant species is dwarf shrub(Cargana tibetica). The authors also point out that when we protect the grassland system, and at the same time the pastoral germ plasm resource is being protected and raise, and the conclusion is that there is not contradiction for nursing grassland system in the region of conservation of germ plasm resource.

关 键 词：宁夏 山羊 核心产区 生物多样性 植物群落 相似性 聚类特征 中卫县 

分 类 号：S827[农业科学—畜牧学] Q948.12[农业科学—畜牧兽医]