Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.
NAME
r.popgrowth - Set of population models (fisheries science)KEYWORDS
Population growth modelSYNOPSIS
r.popgrowth
r.popgrowth --helpr.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
TBD.SEE ALSO
AUTHOR
Johannes RadingerLeibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB)
Berlin, Germany
SOURCE CODE
Available at: r.popgrowth source code (history)
Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730
Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.
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