ecospat.co_occurrences {ecospat}R Documentation

Species Co-Occurrences

Description

Calculate an index of species co-occurrences.

Usage

ecospat.co_occurrences (data)

Arguments

data

A presence-absence matrix for each species (columns) in each location or grid cell (rows) or a matrix with predicted suitability values.

Details

Computes an index of co-occurrences ranging from 0 (never co-occurring) to 1 (always co-occuring).

Value

The species co-occurrence matrix and box-plot of the co-occurrence indices

Author(s)

Loic Pellissier loic.pellissier@unifr.ch

References

Pellissier, L., K.A. Brathen, J. Pottier, C.F. Randin, P. Vittoz, A. Dubuis, N.G. Yoccoz, T. Alm, N.E. Zimmermann and A. Guisan. 2010. Species distribution models reveal apparent competitive and facilitative effects of a dominant species on the distribution of tundra plants. Ecography, 33, 1004-1014.

Guisan, A. and N. Zimmermann. 2000. Predictive habitat distribution models in ecology. Ecological Modelling, 135:147-186

Examples


matrix <- ecospat.testData[c(9:16,54:57)]
ecospat.co_occurrences (data=matrix)

[Package ecospat version 3.4 Index]