云顶山亚高山草甸优势种群生态位研究  

A study on niches of dominant species of subalpine meadow in the Yunding Mountain

作　　者：李斌[1] 李素清[2] 张金屯[3] 

机构地区：[1]中北大学化工与环境学院,山西太原030051 [2]太原师范学院地理系,山西太原030012 [3]北京师范大学生命科学学院,北京100875

出　　处：《草业学报》2010年第1期6-13,共8页Acta Prataculturae Sinica

基　　金：国家自然科学基金项目(30070140);山西省自然科学基金项目(20031043)资助

摘　　要：本研究首先运用TWINSPAN把云顶山亚高山草甸36个样方分为5个群落类型,作为5个综合资源位。采用Levins、Shannon-Wiener生态位宽度指数和Petraitis生态位重叠指数,对云顶山亚高山草甸优势种群的生态位宽度和生态位重叠进行了研究。结果表明,10个优势种群中嵩草的生态位最宽,Levins生态位宽度和Shannon-Wiener生态位宽度分别为8.78和31.58,对环境有广泛的适应性。云顶山亚高山草甸不同群落类型内种群生态位宽度越大,对环境的适应能力越强,对资源的利用能力也越强;生态位重叠越大,种群间的生态相似性越大,利用资源的相似性程度越高。嵩草+蒲公英群落中优势种群生态位普遍重叠值最高,为0.914,各物种有较强的利用资源的共性。TWINSPAN was used to divide 36 types of communities as five resource states. quadrates of subalpine meadow in the Yinding Mountain into five Niche breadths and niche overlaps of dominant species of the subalpine meadow were measured and analyzed using the indexes proposed by Levins, Shannon--Wiener, and Petraits. Niche breadth of Kobresia bellardii was the biggest among the ten dominant species with a Levins niche breadth of 8.78 and Shannon--Wiener niche breadth of 31.58. The species had extensive adaptation to the environment. The bigger the species＇ niche.breadths in the suba their adaptation to the environment and the stronger their capabilities lp of ine meadow, the more extensive were using resources. The greater were the species~ niche overlaps, the greater were the ecological similarities between species and their resources-use The niche overlaps of the dominant species in K. bellardii and Taraccacum mongolicum communities were the biggest （0. 914）, and the two species had common characteristics of resource use.

关 键 词：云顶山 亚高山草甸 生态位宽度 生态位重叠 

分 类 号：S812[农业科学—草业科学]