Compute expected species richness accounting for spatial autocorrelation
(Chiarucci et al. 2009). Uses distance-weighted sampling probabilities.
Usage
spatialRarefaction(x, coords, n_perm = 100, bandwidth = NULL)
Arguments
- x
A site-by-species matrix.
- coords
A data.frame with x and y columns.
- n_perm
Number of permutations. Default 100.
- bandwidth
Distance bandwidth for spatial weighting.
Value
A data.frame with columns: sites, mean, sd, lower, upper
References
Chiarucci, A., Bacaro, G., Rocchini, D. & Fattorini, L. (2009).
Discovering and rediscovering the sample-based rarefaction formula in
the ecological literature. Community Ecology, 10, 195-199.