摘要
运用状态与过渡模式的观点,从植被组成的变化探讨锡林河流域灌丛化草原形成的阈值;从土壤斑块性尺度增强进一步说明草原灌丛化的阈值一旦跨越,这种转变将是难以逆转的,最终会形成以小叶锦鸡儿灌丛斑块占优势的灌丛化草原。草原灌丛化作为草原放牧演替动态的一个重要阶段,它是退化生态系统的自我重建过程,锡林河流域典型草原放牧演替模式是草原灌丛化研究的基本框架。
The state and transition models is applied to discuss the threshold in vegetation composition from steppe to thicketization-steppe, Xilin River Basin, Inner Mongolia. From the increase of soil patchiness scale in the thicketization of steppe, it is suggested that the transition from steppe to thicketization-steppe dominated by Caragana microphylla patches could be irreversible once this threshold is passed. The thicketization of steppe is an important stage of grazing succession, which may be considered as a self-rehabilitation of a degraded ecosystem. The model on the steppe grazing succession is developed, and it is the important framework for the research into the thicketization of steppe in Xilin River Basin,Inner Mongolia.
出处
《草业学报》
CSCD
2006年第2期9-13,共5页
Acta Prataculturae Sinica
基金
国家重点基础研究发展规划项目(G2000018603)资助
关键词
草原灌丛化
阈值
状态与过渡模式
thicketization of steppe
threshold
state and transition models
