| 山西云顶山亚高山草甸群落生态分析 |
| |
| 引用本文： | 李素清,张金屯.山西云顶山亚高山草甸群落生态分析[J].地理研究,2007,26(1):83-90. |
| |
| 作者姓名： | 李素清 张金屯 |
| |
| 作者单位： | 1. 山西大学分子科学研究所,太原,030006;太原师范学院地理系,太原,030012
2. 北京师范大学生命科学学院,北京,100875 |
| |
| 基金项目： | 国家自然科学基金项目(30070140)，山西省自然科学基金项目(20031043)，山西省软科学研究项目(051013-2) |
| |
| 摘 要： | 应用双向指示种分析法 (TWINSPAN )和除趋势对应分析 (DCA )等数量分析方法,对山西云顶山亚高山草甸生态关系进行了研究,将该草甸划分为5个群落类型,分别位于不同的海拔高度。分类结果很好地反映了植物群落类型及优势种的分布与环境因子之间的关系,并在DCA二维排序图上得到了较好的验证。DCA排序轴反映了海拔高度、放牧强度和群落土壤湿度的梯度变化,表明海拔高度和水热条件是影响植物群落变化的主要环境因子,物种多样性在群落类型分化中有重要作用,同时放牧对亚高山草甸演替过程的干扰明显。
|
| 关 键 词： | 云顶山 亚高山草甸 生态分析 TWINSPAN分类 DCA排序 物种多样性 |
| 文章编号： | 1000-0585（2007）01-0083-08 |
| 收稿时间： | 2005-11-22 |
| 修稿时间： | 2005-11-22 |
Ecological analysis of subalpine meadow in Yunding Mountain, Shanxi |
| |
| LI Su-qing,ZHANG Jin-tun.Ecological analysis of subalpine meadow in Yunding Mountain, Shanxi[J].Geographical Research,2007,26(1):83-90. |
| |
| Authors: | LI Su-qing ZHANG Jin-tun |
| |
| Institution: | 1. Institute of Molecular Science, Shanxi University, Taiyuan 030006, China; 2. Geography Department, Taiyuan Normal University, Taiyuan 030012, China; 3. College of Life Science, Beijing Normal University, Beijing 100875, China |
| |
| Abstract: | Based on the field investigation of community plots,two-way indicator species analysis(TWINSPAN) and detrended correspondence analysis(DCA) were applied to analyse the ecological relationships on subalpine meadow communities in Yunding Mountain,Shanxi province.It was showed that:(1)five meadow communities of 36 samples located in different altitudes were recognized by TWINSPAN and characteristics of the communities were described respectively,including distribution of dominant species and relationship with environmental factors.All results were confirmed by the two-dimensional ordination diagram of DCA.(2)The environmental variables,such as altitude,grazing intensity,moisture and heating conditions,were the major environmental factors affecting community's change.The results of DCA ordination showed that the five meadow communities had their different distributions along their environmental gradient.The first axis and the second axis of DCA reflect the gradient of elevation,grazing intensity and soil water conditions of the communities.(3) The distribution patterns of dominant species were highly similar to that of the communities.With the increase of the altitude,Kobresia bellardii,Carex lanceolata,Festuca ovina and Taraxacum mongolicum gradually took the dominant status on the communities,which showed that community distribution patterns were coordinate to the zonal vegetation distribution patterns due to the increase of elevation and the decrease of human interruption.(4)The difference in species diversity of the community had close correlation mainly to the specific evenness and grazing intensity,meanwhile,also had close correlation to the meadow habitat.Species diversity of the meadow distributing in the semi-sunny slope,semi-shady slope,shady slope and high altitude area,due to its better water supply and temperature environment,was much richer than that on the sunny slope and low altitude area.Also habitat conditions degraded because of intensive grazing.Meanwhile,species diversity plays an important role in the development and distribution of the meadow communities.(5) Grazing has an obvious interruption effect on the succession of subalpine meadow communities in Yunding Mountain,which has validated the previous researchers' opinions. |
| |
| Keywords: | Yunding Mountain subalpine meadow ecological analysis TWINSPAN classification DCA ordination species diversity |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地理研究》浏览原始摘要信息 |
| 点击此处可从《地理研究》下载免费的PDF全文 |
|
