| 运用状态与过渡模式讨论锡林河流域典型草原的灌丛化 |
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| 引用本文： | 熊小刚,韩兴国. 运用状态与过渡模式讨论锡林河流域典型草原的灌丛化[J]. 草业学报, 2006, 15(2): 9-13 |
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| 作者姓名： | 熊小刚 韩兴国 |
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| 作者单位： | 1. 中国科学院植物研究所植被数量生态学重点实验室,北京,100093;中国科学院研究生院,北京,100039
2. 中国科学院植物研究所植被数量生态学重点实验室,北京,100093 |
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| 基金项目： | 国家重点基础研究发展规划项目(G2000018603)资助 |
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| 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。
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| 关 键 词： | 草原灌丛化 阈值 状态与过渡模式 |
| 文章编号： | 1004-5759（2006）02-0009-05 |
| 收稿时间： | 2004-04-30 |
| 修稿时间： | 2004-04-30 |
Application of state and transition models to discussing the thicketization of steppe in Xilin River Basin,Inner Mongolia |
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| XIONG Xiao-gang,HAN Xing-guo. Application of state and transition models to discussing the thicketization of steppe in Xilin River Basin,Inner Mongolia[J]. Acta Prataculturae Sinica, 2006, 15(2): 9-13 |
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| Authors: | XIONG Xiao-gang HAN Xing-guo |
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| Affiliation: | 1. Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;2. Graduate School, Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | 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. |
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| Keywords: | thicketization of steppe threshold state and transition models |
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