运用状态与过渡模式讨论锡林河流域典型草原的灌丛化  

Application of state and transition models to discussing the thicketization of steppe in Xilin River Basin,Inner Mongolia

作　　者：熊小刚[1] 韩兴国[1] 

机构地区：[1]中国科学院植物研究所植被数量生态学重点实验室

出　　处：《草业学报》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

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.

关 键 词：草原灌丛化 阈值 状态与过渡模式 

分 类 号：S812[农业科学—草业科学]