摘要
中华鼢鼠是亚高寒草甸的主要害鼠之一,其觅食掘洞的活动严重地破坏了草地原有的植被,同时也影响土丘植被恢复演替的过程。本研究调查分析了亚高寒草甸的鼢鼠土丘植被演替过程中群落种类组成,其结果表明,1)随着演替时间的推移,物种丰富度呈单调递增;2)Shanon-Wiener指数在群落演替初期先迅速增加,至顶极又略微降低;3)用相异性指数公式计算群落物种组成间的变化情况,结果显示,次生演替初期群落间物种组成的相异性程度较高;随着演替时间的推移,这种相异性逐渐减小。因而,鼠丘植被的演替过程是一个由分异至趋同的过程。
Plateau zokor is one of the major rodents and entire plants, largely destructing the grassland. in subalpine meadow, They frequently consume plant roots Meanwhile, they excavate burrow systems and deposit the soil aboveground, then creating new sites that can initiate succession at a local scale. We investigated the community structure on the zokor mound, the results indicate that： 1） There is a continuous increase in species richness with succession. 2） Shanon-Weiner index also show species diversity may peak at the late stage, even higher than the matrix meadow. 3） Using the community heterogeneity index to measure different mound communities, it suggested that the variation is greater in early secondary succession, and the variation will decrease over time. It is a good evidence to prove that the succession of mound is a process from divergence to convergence.
出处
《草业学报》
CSCD
北大核心
2010年第1期14-20,共7页
Acta Prataculturae Sinica
基金
国家自然科学基金项目(30770360)资助
关键词
亚高寒草甸
鼢鼠土丘
物种多样性
演替趋同
sub-alpine meadow
zokor-mound
species diversity
successional convergence
