EcoSimR (version 0.1.0)

czekanowski_var: CzekanowskiVariance Niche Overlap Metric

Description

Takes a niche utilization matrix returns the variance of the Czekanowski niche overlap index

Usage

czekanowski_var(m = matrix(rpois(80, 1), nrow = 10))

Arguments

m

a matrix of resource utilization values.

Value

Returns the variance of the average pairwise niche overlap.

Details

A large value for variance implies that some species pairs show high niche overlap and others show low niche overlap. A low value for variance implies that niche overlap (high or low) is very similar among all species pairs.

References

Winemiller, K.O. and E.R. Pianka. 1990. Organization in natural assemblages of desert lizards and tropical fishes. Ecological Monographs 60: 27-55.

See Also

czekanowski niche overlap index.

Examples

obsVar <- czekanowski_var(m=matrix(rpois(40,0.5),nrow=8))