calc_incoherence: Calculate the incoherence index of a food web

In lsaravia/EcoNetwork: Ecological network analyses including multiplex networks

Calculate the incoherence index of a food web

Description

The incoherence index is based in how the species fit in discrete trophic levels when Q is closer to 0 more coherent and stable is a food web, and the less omnivory it has. It calculates the trophic level using the package NetIndices.

Usage

calc_incoherence(ig, ncores = 0)

Arguments

ig	an igraph object or a list of igraph objects
ncores	number of cores used to compute in parallel, if 0 sequential processing is used.

Details

Based on:

Value

a data.frame with the following fields

Q	incoherence (0=coherent)
rQ	ratio of Q with expected Q under null expectation of a random network given N=nodes L=links B=basal nodes Lb=basal links
mTI	mean trophic level
rTI	ratio of mTI with expected TI under the same null model expectation than Q

References

Johnson, S., Domínguez-García, V., Donetti, L., & Muñoz, M. A. (2014). Trophic coherence determines food-web stability. Proceedings of the National Academy of Sciences , 111(50), 17923–17928. https://doi.org/10.1073/pnas.1409077111

Johnson, S., & Jones, N. S. (2017). Looplessness in networks is linked to trophic coherence. Proceedings of the National Academy of Sciences, 114(22), 5618–5623. https://doi.org/10.1073/pnas.1613786114

Examples

calc_incoherence(netData[[1]])

lsaravia/EcoNetwork documentation built on March 20, 2024, 3:27 p.m.