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作 者 ：王兆印,王光谦,高菁

期 刊 ：生态学报 2003年 23卷 1期 页码：98~105

关键词：植被发育；生态应力；动力学模型；耦合方程组；控制侵蚀；

Keywords:vegetation dynamics model, human activities, coupled differential equations, vegetation cover, rate of soil erosion,

摘 要 ：研究侵蚀地区的植被在水力侵蚀和各种生态应力以及人类活动影响下的演变规律 ,建立了植被生态动力学模型。将作用于植被的各种生态应力分成长期、短期和瞬时应力 ,给出了它们的定量表达式 ,并且统一在植被生态动力学方程中 ;同时进一步得出了动力学耦合方程组的理论解。该模型应用于金沙江支流小江流域 ,结果较好地描述了流域的植被生态演变过程与侵蚀过程的关系 ,说明了治理强度和控制侵蚀对植被发育的重要性。

Abstract:Vegetation dynamics is a new interdisciplinary science, studying the laws of evolution of watershed vegetation under the action of various kinds of ecological stresses, especially soil erosion. Ecological stress is defined as any kind of disturbance, natural or non-natural, on the vegetation development, which may change the vegetation cover or affect the evolution process of vegetation. Soil erosion is the most important natural ecological stress and human activities are the non-natural ecological stress. ...

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