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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Self-similarity and scaling in forest communities
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Self-similarity and scaling in forest communities

机译：森林群落的自相似性和尺度

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摘要

Ecological communities exhibit pervasive patterns and interrelationships between size, abundance, and the availability of resources. We use scaling ideas to develop a unified, model-independent framework for understanding the distribution of tree sizes, their energy use, and spatial distribution in tropical forests. We demonstrate that the scaling of the tree crown at the individual level drives the forest structure when resources are fully used. Our predictions match perfectly with the scaling behavior of an exactly solvable self-similar model of a forest and are in good accord with empirical data. The range, over which pure power law behavior is observed, depends on the available amount of resources. The scaling framework can be used for assessing the effects of natural and anthropogenic disturbances on ecosystem structure and functionality.
机译：生态社区表现出普遍的模式，并且在大小，丰度和资源可用性之间存在相互关系。我们使用缩放思想来开发一个统一的，与模型无关的框架，以了解热带森林中树木的大小分布，能源消耗以及空间分布。我们证明，当资源得到充分利用时，树冠在各个级别上的缩放将驱动森林结构。我们的预测与森林的完全可解自相似模型的缩放行为完全匹配，并且与经验数据非常吻合。观察到纯幂律行为的范围取决于可用资源量。缩放框架可用于评估自然和人为干扰对生态系统结构和功能的影响。

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  • 作者

    Filippo Simini; Tommaso Anfodillo; Marco Carrer; Jayanth R. Banavar; Amos Maritan;

  • 作者单位

    Dipartimento di Fisica 'G. Galilei,' Universita di Padova, Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia and Istituto Nazionale di Fisica Nucleare, via Marzolo 8, 35131 Padua, Italy;

    rnDipartimento Territorio e Sistemi Agro-Forestali, Universita di Padova, Agripolis, viale dell'Universita 16, 35020 Legnaro (PD), Italy;

    rnDipartimento Territorio e Sistemi Agro-Forestali, Universita di Padova, Agripolis, viale dell'Universita 16, 35020 Legnaro (PD), Italy;

    rnDepartment of Physics, Pennsylvania State University, 104 Davey Laboratory, University Park, PA 16802;

    rnDipartimento di Fisica 'G. Galilei,' Universita di Padova, Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia and Istituto Nazionale di Fisica Nucleare, via Marzolo 8, 35131 Padua, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    distribution of tree sizes; energy equivalence principle; finite size scaling; metabolic efficiency; tree shape;

    机译：树木大小的分布;能量等效原理有限尺寸缩放;代谢效率树形;

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