小五台山亚高山草甸生物多样性的空间格局  

The Spatial Pattern of Biodiversity in Subalpine Meadow on Mt.Xiaowutai

作　　者：黄晓霞[1] 江源[1] 刘全儒[1] 黄秋如[1] 戴泉玉[1] 

机构地区：[1]北京师范大学资源科学研究所

出　　处：《地理学报》2003年第2期186-192,共7页Acta Geographica Sinica

基　　金：国家自然科学基金资助项目(40071002)~~

摘　　要：在野外考察获取第一手资料的基础上,主要采用Shannon-Weaver指数和S覬rensen指数对小五台山亚高山草甸植被的植物生物多样性及其空间变化格局进行了分析和研究。主要结论如下:1) 海拔高度对植物生物多样性影响非常明显,海拔2300 m和2700 m左右分别既是琢多样性也是茁多样性出现明显变化的地段。2) 不同坡向条件下群落的琢多样性表现为东坡>西坡>南坡>北坡;而S覬rensen指数分析表明,当坡向变化时,β多样性较高。3) 山坡中部特别是中下部具有较高的琢多样性,而茁多样性较低,坡面上茁多样性的大小主要取决于坡面所处海拔高度的范围。Based on the data from field survey in subalpine meadow on Mt. Xiaowutai, Hebei Province, αdiversity andβdiversity of the meadow were analyzed through Shannon-Weaver index and S rensen index analysis in this paper. The results are as follows: 1) Both diversity indexes change obviously with elevation, and αdiversity and βdiversity change dramatically at the elevations of around 2300 m and 2700 m. 2) The order of αdiversity index, from high to low, is Eastern > Western > Southern > Northern.βdiversity reflected by S  rensen index increases when slope exposure changes. 3) Higher αdiversity, but lower βdiversity is observed on the mid-slope or the mid-bottom slope. The value of βdiversity depends mostly on the range of elevation, normally between 2300 m and 2750 m, the βvalue reaches the highest.

关 键 词：小五台山 亚高山草甸 生物多样性 空间格局 海拔高度 坡向 

分 类 号：S812[农业科学—草业科学]