Theoretical perspectives on resource pulses
Theoretical perspectives on resource pulses
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DOI：
10.1890/07-0348.1
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发表时间：
2008-03-01
期刊：
影响因子：
4.8
通讯作者：
Holt, Robert D.
中科院分区：
文献类型：
--
作者：
Holt, Robert D.
在过去的几十年里，人们越来越认识到非平衡现象和瞬态动力学在解释生态群落结构中的重要性。本文概述了与资源脉动相关的理论主题。理论模型表明，对单个脉冲的短期反应可能与长期反应有质的不同。反复出现的资源脉冲可以改变社区结构，使原本不会发生的共存成为可能，或妨碍在稳定环境中有效的共存机制。对于给定的资源输入，短脉冲的系统响应可能更剧烈。资源脉冲可能导致可选状态之间的转换。扩散使物种能够利用当地零星的资源脉冲，并在平均不适合的环境中生存。所有这些问题都需要进一步的理论探索。
Over the last several decades, there has been a growing appreciation of the importance of nonequilibrial phenomena and transient dynamics in explaining the structure of ecological communities. This paper provides an overview of theoretical themes related to resource pulses. Theoretical models suggest short-term responses to a single pulse can qualitatively differ from longer-term responses. Recurrent resource pulses can alter community structure, permitting coexistence that otherwise would not occur, or hamper coexistence mechanisms effective in stable environments. For a given resource input, system responses can be more dramatic with short pulses. Resource pulses can cause transitions between alternative states. Dispersal permits species to exploit locally sporadic resource pulses and persist in environments that on average are unsuitable. All these issues are ripe for further theoretical explorations.