| 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)