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Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

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: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55

Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

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