Last data update: 2014.03.03
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R: Niche equivalency
nicheEquivalency | R Documentation |
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)
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sp2 |
coordinates for species 2 (matrix with (x, y) or (lon, lat), or SpatialPoints)
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predictors |
Raster object with environmental variables
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n |
integer. Number of randomizations
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model |
function. modeling algorithm to me used
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verbose |
logical. If TRUE some progress indicators are printed
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... |
additional arguments (none)
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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.
Results
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