palaeoSig (version 2.1-4)

abundances: Generates simulated species abundances

Description

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

Usage

abundances(env, spp, nc)

Value

A list with two elements:

spp

A data frame with species abundances.

env

A data frame with 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

Count sum 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. tools:::Rd_expr_doi("10.1007/BF00039167")

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)