Compute the asymptotic population growth rate (lambda) per species

Usage

lambda(mod, pars, stand, env, ctrl = NULL)

Arguments

mod: An ipm_spModel object.
pars: An ipm_parameters object. Must contain parameters for at least one species in mod. Lambda is computed only for species present in both mod and pars - other species in stand are used as competitors but do not appear in the output.
stand: An ipm_stand object. Provides size distributions for all species (focal and competitors).
env: An ipm_env object. Climate drivers.
ctrl: An ipm_control object or NULL. Only bin_width and delta_time are used. If NULL, defaults are used.

Value

An object of S3 class "ipm_lambda" - a named numeric vector with one element per focal species (species with available parameters).

Examples

df <- data.frame(size_mm = c(150, 200, 350),
                 species_id = "ABIBAL",
                 plot_size  = 1000)
s    <- stand(df)
mod  <- species_model(s)
pars <- parameters(mod, draw = "mean")
env  <- env_condition(MAT = 8, MAP = 1200)
ctrl <- control(years = 5, compute_lambda = TRUE, progress = FALSE)
lam  <- lambda(mod, pars, s, env, ctrl)
print(lam)
#> <ipm_lambda>  draw=mean
#>   ABIBAL: 2.0762