Generates simulated species abundances

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

Usage

abundances(env, spp, nc)

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.

Value

A list with two elements:

spp

A data frame with species abundances.

env

A data frame with environmental variables.

References

Minchin, P.R. (1987) Multidimensional Community Patterns: Towards a Comprehensive Model. Vegetatio, 71, 145-156. doi:10.1007/BF00039167

See also

make.env, species

Author

Mathias Trachsel and Richard J. Telford

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)