population_transitions: Nested functions for stage-based population transitions.

In poems: Pattern-Oriented Ensemble Modeling System

Nested functions for stage-based population transitions.

Description

Modular functions for the population simulator for performing staged-based (Leslie/Lefkovitch matrix) transitions via 3D survival and fecundity arrays.

Usage

population_transitions(
  populations,
  demographic_stochasticity,
  fecundity_matrix,
  fecundity_max,
  survival_matrix
)

Arguments

populations	Number of populations.
demographic_stochasticity	Boolean for choosing demographic stochasticity for transitions.
fecundity_matrix	Matrix of transition fecundity rates (Leslie/Lefkovitch matrix with non-zero fecundities only).
fecundity_max	Maximum transition fecundity rate (in Leslie/Lefkovitch matrix).
survival_matrix	Matrix of transition survival rates (Leslie/Lefkovitch matrix with non-zero survivals only).

Value

Transition calculation function: function(fecundity_array, survival_array, stage_abundance, occupied_indices), where:

fecundity_array

3D array of fecundity rates (stages rows by stages columns by populations deep).

survival_array

3D array of survival rates (stages rows by stages columns by populations deep).

stage_abundance

Matrix of stage abundances for each population at time step (stages rows by populations columns).

occupied_indices

Array of indices for those populations occupied.

returns

Transitioned stage abundances.

poems documentation built on Oct. 7, 2023, 9:06 a.m.