摘要
基于野外考察获取的第一手资料,主要采用shannon-weaver指数和sφrensen指数对五台山高山、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.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2 300 m和2 800 m左右分别既是α多样性也是β多样性出现明显变化的地段,海拔2 300 m可能为亚高山草甸分布的下限,而海拔2 800 m为高山草甸分布的下限;2)不同坡向条件下群落的α多样性大小依次排列为:半阳坡、阳坡、阴坡、半阴坡;3)sφrensen指数分析表明,当坡向变化时,β多样性较高;4)山坡中部特别是中上部具有较高的α多样性,而β多样性较低,坡面上β多样性的大小主要取决于坡面所处海拔高度的范围.
Based on field survey data for alpine meadow on Wutai Mountain, Shanxi province, α and β meadow diversity were analyzed through shannon-weaver index and sorensen index. Data show that： 1） Both diversity indices changed markedly with elevation, α and β diversity changed dramatically at elevations 2 300 m and 2 800 m. 2 300 m a. s. 1. might be the lower limit of sub-alpine meadow, while 2 800 m a. s. 1. being the lower limit of alpine meadow. 2） The order of α diversity index, from high to low, is. semi-sunny convex slopes, sunny slopes, shady slopes, semi-shady convex slopes. 3）β diversity reflected by sorensen index increased with different slope exposures. 4） Higher a diversity, but lower β diversity is observed on mid-slope or mid-up slope. The value of β diversity depends mostly on elevation, normally between 2 300 and 2 800 m,β value was the highest.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第1期91-95,共5页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金资助项目(4057100140371043)
云南大学理(工)科校级科研重点资助项目(2005Z005B)
云南大学中青年骨干教师培养计划资助项目(W33020000)
