calc_incoherence: Calculate the incoherence index of a food web

Description Usage Arguments Details Value References Examples

View source: R/calcTopologicalIndices.r

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

1
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

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lsaravia/EcoNetwork documentation built on Oct. 26, 2020, 11:09 p.m.