picante (version 0.7-1)

mntd: Mean nearest taxon distance

Description

Calculates MNTD (mean nearest taxon distance) for taxa in a community

Usage

mntd(samp, dis, abundance.weighted=FALSE)

Arguments

samp

Community data matrix

dis

Interspecific distance matrix

abundance.weighted

Should mean nearest taxon distances for each species be weighted by species abundance? (default = FALSE)

Value

• Vector of MNTD values for each community.

Details

This metric has also been referred to as MNND (mean nearest neighbour distance), and the function was named mnnd in picante versions < 0.7.

References

Webb, C., D. Ackerly, M. McPeek, and M. Donoghue. 2002. Phylogenies and community ecology. Annual Review of Ecology and Systematics 33:475-505.

See Also

ses.mntd

Examples

data(phylocom)
mntd(phylocom$sample, cophenetic(phylocom$phylo), abundance.weighted=TRUE)