Scaling in a network model of a multispecies ecosystem

Ricard V. Solé; David Alonso; Alan McKane

doi:10.1016/S0378-4371(00)00304-6

Scaling in a network model of a multispecies ecosystem

Ricard V. Solé, David Alonso, Alan McKane

Research output: Contribution to journal › Article › peer-review

Abstract

A new model ecosystem of many interacting species is introduced in which the species are connected through a random matrix with a given connectivity. The model is studied both analytically and by numerical simulations. A probability distribution derived from the model is in good agreement with simulations and field data. It is also shown that the connectivity, C, and the number of species, S, are linked through the scaling relation 〈S〉 = k(C)-1+ε, which is observed in real ecosystems. Our approach suggests a natural link between log-normal and power-law distributions of species abundances.

Original language	English
Pages (from-to)	337-344
Number of pages	7
Journal	Physica A: Statistical Mechanics and its Applications
Volume	286
Issue number	1
DOIs	https://doi.org/10.1016/S0378-4371(00)00304-6
Publication status	Published - 15 Oct 2000

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abstract = "A new model ecosystem of many interacting species is introduced in which the species are connected through a random matrix with a given connectivity. The model is studied both analytically and by numerical simulations. A probability distribution derived from the model is in good agreement with simulations and field data. It is also shown that the connectivity, C, and the number of species, S, are linked through the scaling relation 〈S〉 = k(C)-1+ε, which is observed in real ecosystems. Our approach suggests a natural link between log-normal and power-law distributions of species abundances.",

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AB - A new model ecosystem of many interacting species is introduced in which the species are connected through a random matrix with a given connectivity. The model is studied both analytically and by numerical simulations. A probability distribution derived from the model is in good agreement with simulations and field data. It is also shown that the connectivity, C, and the number of species, S, are linked through the scaling relation 〈S〉 = k(C)-1+ε, which is observed in real ecosystems. Our approach suggests a natural link between log-normal and power-law distributions of species abundances.

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DO - 10.1016/S0378-4371(00)00304-6

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EP - 344

JO - Physica A: Statistical Mechanics and its Applications

JF - Physica A: Statistical Mechanics and its Applications

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Scaling in a network model of a multispecies ecosystem

Abstract

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