nicheEquivalency {dismo}

Niche equivalency

Description

Compute niche equivalency for two species following Warren et al. (2009). The statistic ranges from 0 to 1.

Usage

 
nicheEquivalency(sp1, sp2, predictors, n=99, model=maxent, verbose=TRUE, ...) 

Arguments

sp1

coordinates for species 1 (matrix with (x, y) or (lon, lat), or SpatialPoints)

sp2

coordinates for species 2 (matrix with (x, y) or (lon, lat), or SpatialPoints)

predictors

Raster object with environmental variables

n

integer. Number of randomizations

model

function. modeling algorithm to me used

verbose

logical. If TRUE some progress indicators are printed

...

additional arguments (none)

Value

numeric

Author(s)

Brian Anacker. Based on a similar function in by Christoph Heibl in the phyloclim package

References

Warren, D.L., R.E. Glor, M. Turelli, 2008. Environmental niche equivalency versus conservatism: quantitative approaches to niche evolution. Evolution 62:2868-2883.