生态系统中次生演替瞬态的反馈动力学分析
Feedback dynamics analysis of secondary successional transients in ecosystems.
作者信息
Gutierrez L T, Fey W R
出版信息
Proc Natl Acad Sci U S A. 1975 Jul;72(7):2733-7. doi: 10.1073/pnas.72.7.2733.
A theoretical dynamic model of the mutual causalities that generate secondary successional behavior in ecological systems is developed using zero- and first-order nonlinear difference equations. The model is based on Odum's tabular model of ecological succession, and has been simulation-tested for the case of secondary succession in a grassland ecosystem. It shows how energy, abiotic and biotic matter, and community (species) diversity interact in time and space to produce autogenic succession, that is, developmental changes generated by biotic components within the system as distinguished from allogenic forcing functions from without the system. The simulations demonstrate that successional transients can arise from the endogenous feedback structure of the ecosystem and provide strong evidence for the validity of the model.
利用零阶和一阶非线性差分方程，建立了一个理论动力学模型，该模型用于描述生态系统中产生次生演替行为的相互因果关系。该模型基于奥德姆的生态演替表格模型，并已针对草地生态系统的次生演替情况进行了模拟测试。它展示了能量、非生物和生物物质以及群落（物种）多样性如何在时间和空间上相互作用，从而产生自生演替，即与来自系统外部的异源强迫函数不同，由系统内生物成分产生的发育变化。模拟结果表明，演替瞬态可能源于生态系统的内源性反馈结构，并为该模型的有效性提供了有力证据。
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