sdd_lambda: Short distance dispersal: lambda-based

In Sz-Tim/gbPopMod: Mechanistic species distribution model for glossy buckthorn (*Frangula alnus*)

Description

Calculate the number of immigrants to each cell, accounting for distance from source cell and bird habitat preferences. It uses the output from simple lambda-based population growth rather than the demographic version. The output values account for carrying capacity.

Usage

sdd_lambda(N.new, id.i, sdd.pr, sdd.rate, K.E, sdd.st = T)

Arguments

id.i	Tibble matching cell IDs. id indexes on the entire grid while id.in indexes only inbound cells
sdd.pr	Array with dim(i:disp.rows, j:disp.cols, k:2, n:ncell) output from sdd_set_probs
sdd.rate	Rate parameter for SDD exponential kernel
K.E	Carrying capacity of each cell output from cell_E
sdd.st	Logical denoting whether to implement short distance dispersal stochastically
ncell	Number of inbound grid cells

Value

Tibble with grid id and number of individuals limited by K

Sz-Tim/gbPopMod documentation built on Dec. 7, 2020, 1:07 p.m.