Description Usage Arguments Value References Examples
View source: R/calcFunctionalIndices.r
The function calculates: weighted linkage density, connectance, generality and vulnerability and the SDs of the last two based on 1
and the level of omnivory, mean and maximum trophic level based on 2 using NetIndices::TrophInd()
function.
The igraph networks must have the weight attribute.
1 | calc_weighted_topological_indices(ig, ncores = 0)
|
ig |
An igraph object with the weight attribute representing fluxes |
ncores |
number of cores used to compute in parallel, if 0 sequential processing is used. |
a data.frame with the following fields:
LD: |
linkage density |
Connectance: |
directed Connectance |
TLmean: |
mean trophic level |
TLmax: |
maximum trophic level |
LOmnivory: |
Level of omnivory, quantifies mean of the variety in trophic levels of the preys of a consumer
Vulnerability: |
mean of number of consumers per prey |
VulSD: |
the standard deviation of normalized Vulnerability |
Generality: |
mean number of prey per consumer |
GenSD: |
the standard deviation of normalized Generality |
Bersier, LF. et al. (2002). Quantitative Descriptors Of Food-web Matrices. Ecology, 83(9), 2394–2407.
Kones, JK. et al. (2009). Are network indices robust indicators of food web functioning? A Monte Carlo approach. Ecological Modelling, 220, 370–382.
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