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NAME

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

KEYWORDS

Population growth model

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

Table of contents

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.

EXAMPLES

SEE ALSO

AUTHOR

Johannes Radinger
Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB)
Berlin, Germany

SOURCE CODE

Available at: r.popgrowth source code (history)

Latest change: Monday Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55

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© 2003-2023 GRASS Development Team, GRASS GIS 7.8.9dev Reference Manual