食物网中的通用缩放关系
Diego Garlaschelli1, Guido Caldarelli, Luciano Pietronero
1INFM UdR Roma 1 and Dipartimento di Fisica Università di Roma la Sapienza, P. le A. Moro 5, 00185 Rome, Italy.
Nature
|May 9, 2003
概括
生态食物网在跨越树木方面表现出普遍的扩展,与其他网络不同. 这项研究将食物网视为运输网络,以揭示跨生态系统的共同组织原则.
科学领域:
- 生态生态学 生态生态学
- 网络科学 网络科学
- 理论生物学 理论生物学
背景情况:
- 作为物种相互作用网络的生态食物网对于理解生态系统组织至关重要.
- 传统的网络分析显示,食物网与互联网等其他网络不同,其特点包括小世界属性和无尺度度的度分布.
- 在食物网中观察到的特征与其大小有很大差异.
研究的目的:
- 提出一种新的框架来分析生态食物网,将它们概念化为运输网络.
- 通过应用全米缩放概念来研究食物网组织中的普遍模式.
- 通过网络拓比较,确定生态系统结构的基本共同原则.
主要方法:
- 食物网被模拟为运输网络,将全米缩放的概念扩展到生态网络.
- 食物网被分解成跨越树木和循环形成的链接.
- 这些组件的缩放关系在不同的现实世界食物网中进行了分析.
主要成果:
- 食物网中的循环数量在不同生态系统中显示出显著的差异.
- 在食物网中跨越树木的特点是普遍的缩放关系.
- 这表明,无论食物网的具体组成或大小如何,食物网的分支属性都具有一致的底层结构.
结论:
- 生态食物网,当通过运输网络和全米缩放的镜头来观察时,在其跨越树木中表现出普遍的结构性质.
- 这些发现突出了生态系统中常见的组织原则,这些原则在使用标准网络分析方法时并不明显.
- 这项研究为了解生态社区的基本架构提供了新的视角.
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