GRASS GIS manual: r.popgrowth

NAME

r.popgrowth - Set of population models (fisheries science)

KEYWORDS

SYNOPSIS

r.popgrowth

r.popgrowth --help

r.popgrowth [-i] n_initial=string timesteps=integer [exponential_output=name] [r_exp_value=float] [r_exp_map=string] [ricker_output=name] [k_value=integer] [k_map=string] [r_rick_value=float] [r_rick_map=string] [population_patches=string] [seed=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

-i: Calculate models with rounded integer values
--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

n_initial=string [required]: Map of number of individuals per cell at time t0 (initial population size)
timesteps=integer [required]: Number of time steps; Default: 1
exponential_output=name: Name for exponential model output map
r_exp_value=float: Cell-specific fixed value of intrinsic rate of increase, log(finite rate of increase, lambda)
r_exp_map=string: Map of cell-specific intrinsic rate of increase, log(finite rate of increase, lambda)
ricker_output=name: Name for Ricker model output map
k_value=integer: Fixed value of carrying capacity of the environment (per cell)
k_map=string: Map of carrying capacity of the environment (per cell)
r_rick_value=float: Cell-specific fixed value of intrinsic rate of increase (Ricker)
r_rick_map=string: Map of cell-specific intrinsic rate of increase (Ricker)
population_patches=string: Optional raster map of patches of single populations. If provided, growth models are calculated based on these patches (patch-averaged r and cumulated k).
seed=integer: fixed seed for random rounding

DESCRIPTION
EXAMPLES
SEE ALSO
AUTHOR

DESCRIPTION

r.popgrow calculates classical models of population growths. The module creates a new raster map of population size (abundance) after a specified number of time steps based on an intial populations size (input raster).

Available models for populations growth: Exponential growth and the Ricker model.