fd_fdis {fundiversity}

Compute Functional Dispersion (FDis)

Description

This function computes Functional Dispersion (FDis) following Laliberté & Legendre (2010). NB: when a site contains no species FDis is equal to 0.

Usage

fd_fdis(traits, sp_com)

Arguments

traits

Trait matrix with species as rows and traits as columns. It has to contain exclusively numerical values. This can be either a matrix, a data.frame, or a Matrix::Matrix() object.

sp_com

Site-species matrix with sites as rows and species as columns if not provided, the function considers all species with equal abundance in a single site. This can be either a matrix, a data.frame, or a Matrix::Matrix() object.

Value

a data.frame with two columns:

• site the names of the sites as the row names of the input sp_com,

• FDis the values of functional dispersion at each site.

NB: when a site contains no species FDis is equal to 0.

Parallelization

The computation of this function can be parallelized thanks to future::plan(). To get more information on how to parallelize your computation please refer to the parallelization vignette with: vignette("fundiversity_1-parallel", package = "fundiversity")

References

Laliberté, E., & Legendre, P. (2010). A distance-based framework for measuring functional diversity from multiple traits. Ecology, 91(1), 299–305. doi:10.1890/08-2244.1

Examples

data(traits_birds)
data(site_sp_birds)
fd_fdis(traits_birds, site_sp_birds)