首页 | 本学科首页   官方微博 | 高级检索  
   检索      

Aims
作者姓名:岳鹏鹏  卢学峰  叶润蓉  周玉碧  杨仕兵  张长现  彭敏
作者单位:中国科学院西北高原生物研究所,西宁 810001
中国科学院研究生院,北京 100049
基金项目:国家重点基础研究发展计划(973计划),中国科学院知识创新工程项目
摘    要: 选择江河源区玛多、曲麻莱、同德3地区的典型紫花针茅(Stipa purpurea)草原为研究对象, 采用样线和样方相结合的方法调查群落, 初步分析了江河源区紫花针茅草原的群落特征。结果表明: 1)所调查紫花针茅草原群落是物种组成比较简单、北温带分布的属为主体的草原群落。2)所有样线经聚类分析可归为3个群落类型: 紫花针 茅+二裂委陵菜(Potentilla bifurca)群落(Ⅰ)、紫花针茅+高山嵩草(Kobresia pygmaea)群落(Ⅱ)、紫花针茅+川青早熟禾(Poa indattenuata)群落(Ⅲ), 且各群落分布于不同区域。虽然这3个群落类型都是典型的紫花针茅群落, 但各自的群落结构还是存在一定差异, 群落相似性分析结果表明群落Ⅰ和Ⅱ的相似性较高, 群落Ⅰ和Ⅲ的相似性较低。3)紫花针茅草原的群落分布呈现出小尺度区域同质性和大尺度异域异质性的特点。4)所调查紫花针茅草原群落的均匀度指数、Shannon-Wiener指数和Simpson指数间以及它们和纬度间均呈显著相关。各α多样性指数在3个地区的群落间表现出基本一致的变化规律, 按均匀度指数、Shannon-Wiener指数和Simpson指数从大到小的顺序依次是: 群落Ⅱ>群落Ⅲ>群落Ⅰ。

关 键 词:江河源区    紫花针茅草原    聚合分析    群落特征    α多样性" target="_blank">α多样性')">α多样性
收稿时间:2007-11-19

COMMUNITY CHARACTERISTICS OF STIPA PURPUREA STEPPE IN SOURCE REGIONS OF CHANGJIANG AND HUANGHE RIVERS, CHINA
YUE Peng-Peng,LU Xue-Feng,YE Run-Rong,ZHOU Yu-Bi,YANG Shi-Bing,ZHANG Chang-Xian,PENG Min.Aims[J].Acta Phytoecologica Sinica,2008,32(5):1116-1125.
Authors:YUE Peng-Peng  LU Xue-Feng  YE Run-Rong  ZHOU Yu-Bi  YANG Shi-Bing  ZHANG Chang-Xian  PENG Min
Institution:Northwest Institute of Plateau Biology, Xining 810001, China, and
Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:Aims Stipa purpurea steppe is one of the most important ecosystems in source regions of Changjiang (Yangtse) and Huanghe (Yellow) Rivers. Our objective was to determine Stipa purpurea community characteristics. Methods Typical Stipa purpurea communities distributed in Maduo, Qumalai and Tongde of Qinghai Province were selected as three sampling locations and sampled using 33 sampling lines for a total of 330 samples. Analyses used PCORD, SPSS and EXCEL software. Important findings Species composition of the investigated community was simple, with 96 species grouped into 58 genera and 23 families. North Temperate genera were dominant. We identified three associations: Stipa purpurea+Potentilla bifurca association (Ⅰ), Stipa purpurea + Carex parva association (Ⅱ), and Stipa purpurea+Poa indattenuata association (Ⅲ). These associations have different characteristics that are analyzed in this paper. Comparability analysis show that association Ⅰ is much more similar to association Ⅱ than Ⅲ, but the importance value of S. purpurea is much higher than any other species in all associations. The community distribution of S. purpurea steppe is heterogeneous at coarse scale and regionally homogeneous at fine scale. The correlations are all significant among evenness, Simpson, Shannon-Wiener indices and latitude. The curves of evenness, Simpson and Shannon-Wiener indices changed similarly in samples. Species diversity for the associations was Ⅱ>Ⅲ>Ⅰ.
Keywords:source regions of Changjiang and Huanghe River  Stipa purpurea steppe  agglomerative clustering  community characteristics  α diversity
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《植物生态学报》浏览原始摘要信息
点击此处可从《植物生态学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号