摘要
在青藏高原东部的甘南高寒草甸就高原鼢鼠Myospalax baileyi不同干扰强度对草地植被的影响,主要是对植被组成、物种多样性和功能群多样性的影响进行了研究。结果表明,高原鼢鼠干扰对草地植被组成和物种多样性变化有重要影响;物种数在中度干扰时达到最大(32种),依次为轻度干扰(20种)、重度干扰(16种);Shannon-Wiener指数、Simpson指数和均匀度指数均表现出相似的变化趋势;功能群数在各干扰样地中没有变化,但功能群内物种数和功能群内Shannon指数变化显著,各功能群内物种数均在中度干扰时达最大值。
An investigation was conducted in alpine meadow grassland in eastern part of Qinghai-Tibetan plateau of China to study the effects of plateau zokor （Myospalax baileyi） disturbance on vegetation responses in the summer of 2005. The vegetation composition, species richness, functional group diversity and functional composition were studied in three disturbance levels： low, moderate and high disturbance intensity. The results indicated that the disturbance of zokor had important influence on plant diversity and composition. Plant species richness was the maximum （S=32） in the site with moderate disturbance, followed by the light disturbed （S=20） and highly disturbed （S=16） site. The Shannon index, Simpson dominance index, and evenness index exhibited a similar trend. Functional group analyses showed that the number and identity of functional groups did not vary among the different disturbance sites. The species number and Shannon index within different functional groups changed significantly.
出处
《草业科学》
CAS
CSCD
2006年第10期68-72,共5页
Pratacultural Science
基金
甘肃省重大科技成果转化项目
甘肃省科技攻关计划项目(2GS052-A21-012)
甘肃省退牧还草科技支撑项目
关键词
高原鼢鼠
高寒草甸
物种组成
物种多样性
功能群
Plateau zokor
alpine meadow
species composition
speciesdiversity
functional group
