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Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits

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The nested assembly of individual-resource networks.

M M Pires¹, P R Guimarães, M S Araújo

¹Programa de Pós-Graduação em Ecologia, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083-970 Campinas, São Paulo, Brazil. mathiasmpires@gmail.com

The Journal of Animal Ecology

|June 8, 2011

Summary

Ecological networks reveal how individual animals use resources differently. This study found nested resource use patterns in 10 vertebrate species, suggesting a common mechanism for diet variation.

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Area of Science:

Ecology
Behavioral Ecology
Network Theory

Background:

Current ecological theories often overlook individual variation in resource use.
Individual differences in diet can significantly impact ecological network structures.

Purpose of the Study:

To investigate the network structure of individual-resource interactions in vertebrate populations.
To determine if interindividual diet variation results in predictable network patterns.

Main Methods:

Assembled individual-resource networks for 10 vertebrate species using dietary data.
Applied a network-based approach to analyze network topology.
Tested for nestedness and modularity in empirical networks.

Main Results:

All analyzed empirical networks exhibited significant nestedness.
No significant modularity was detected in any of the networks.
Nestedness indicates populations comprise opportunistic and selective individuals with ordered diets.

Conclusions:

Nestedness is a prevalent pattern in ecological networks, extending to individual trophic interactions.
Findings support optimal diet theory models where individuals share rank preferences but vary in resource acceptance.
A common mechanism likely underlies interindividual variation in resource use across diverse taxa.