Statistical mechanics and stability of a model eco-system

We study a model eco-system by means of dynamical techniques from disordered systems theory. The model describes a set of species subject to competitive interactions through a background of resources, which they feed upon. Additionally direct competitive or co-operative interaction between species may occur through a random coupling matrix. We compute the order parameters of the system in a fixed point regime and identify the onset of instability and compute the phase diagram. We focus on the effects of variability of resources, direct interaction between species, co-operation pressure and dilution on the stability and the diversity of the eco-system. It is shown that resources can be exploited optimally only in the absence of co-operation pressure or direct interaction between species.

• Publication year

  2007

• Venue

  Journal of Statistical Mechanics: Theory and Experiment

• Publication date

  2007-05-10

• Fields of study

  Biology, Mathematics, Physics, Environmental Science

• Identifiers
  DOI 10.1088/1742-5468/2007/09/P09003arXiv 0705.1523
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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