palaeoSig (version 2.1-3)

abundances: Generates abundances

Description

Generates species abundances based on species response functions and environmental variables.

Usage

abundances(env, spp, nc)

Value

spp

Data frame containing species abundances.

env

Data frame containing environmental variables.

Arguments

env

Environmental variables. Usually generated by make.env. Users may as well supply own environmental variables.

spp

Species parameters. Usually generated by species.

nc

Number of counts to be simulated. If omitted no simulation of the counting process is carried out.

Author

Mathias Trachsel and Richard J Telford

References

Minchin, P.R. (1987) Multidimensional Community Patterns: Towards a Comprehensive Model. Vegetatio, 71, 145-156.

See Also

make.env, species

Examples

spec <- species(nspp = 30,ndim = 10,Amax = runif,fun = runif, xpar = c(-50,150),
    srange = 200, alpha = 4, gamma = 4)
env.var <- make.env(100,elen =rep(100,10),emean = rep(50,10), edistr ='uniform',
    ndim = 10)
spec.abun <- abundances(env.var,spec,200)