ecospat (version 2.0)

ecospat.niche.overlap: Calculate Niche Overlap

Description

Calculate the overlap metrics D and I based on two species occurrence density grids z1 and z2 created by ecospat.grid.clim.

Usage

ecospat.niche.overlap (z1, z2, cor)

Arguments

z1

Species 1 occurrence density grid created by ecospat.grid.clim.

z2

Species 2 occurrence density grid created by ecospat.grid.clim.

cor

Correct the occurrence densities of each species by the prevalence of the environments in their range (T = yes, F = no).

Value

Details

if cor=F, the z$uncor objects created by ecospat.grid.clim are used to calculate the overlap. if cor=T, the z$cor objects are used.

References

Broennimann, O., M.C. Fitzpatrick, P.B. Pearman, B. Petitpierre, L. Pellissier, N.G. Yoccoz, W. Thuiller, M.J. Fortin, C. Randin, N.E. Zimmermann, C.H. Graham and A. Guisan. 2012. Measuring ecological niche overlap from occurrence and spatial environmental data. Global Ecology and Biogeography, 21, 481-497.

Schoener, T.W. 1968. Anolis lizards of Bimini: resource partitioning in a complex fauna. Ecology, 49, 704-726.

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

See Also

ecospat.grid.clim.dyn