fundiversity (version 1.1.1)

fd_feve: Compute Functional Evenness (FEve)

Description

This function computes Functional Evenness (FEve) following Villéger et al. (2008). NB: By definition FEve is equal to NA when the number of species per site is strictly lower than 3.

Usage

fd_feve(traits = NULL, sp_com, dist_matrix = NULL)

Value

a data.frame with two columns:

• site character column that contains site names based on input sp_com row names,

• FEve numeric column that contains FEve values corresponding to each site.

NB: By definition FEve is equal to NA when the number of species per site is strictly lower than 3.

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.

dist_matrix

A dissimilarity matrix that can be provided instead of a trait data.frame (default: NULL). This can be either a matrix, a data.frame, or a Matrix::Matrix() object.

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

Villéger, S., Mason, N.W.H., Mouillot, D., 2008. New Multidimensional Functional Diversity Indices for a Multifaceted Framework in Functional Ecology. Ecology 89, 2290–2301. tools:::Rd_expr_doi("10.1890/07-1206.1")

Examples

data(traits_birds)
fd_feve(traits_birds)