sdd_disperse: Short distance dispersal

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

Description

Calculate the number of viable seeds deposited within the short distance dispersal neighborhood of each cell, accounting for the distance from the source cell, bird habitat preference, the proportion of fruits eaten by birds, and seed viability post-digestion.

Usage

sdd_disperse(id.i, Fr, gamma, p.c.E, s.c, sdd.sp, sdd.rate, sdd.st = T,
  edges = "wall")

Arguments

id.i	Tibble matching cell IDs. id indexes on the entire grid while id.in indexes only inbound cells
Fr	Tibble of fruits produced in each cell output from make_fruits
gamma	Scalar: mean number of seeds per fruit
p.c.E	Vector of proportion of fruits eaten by birds from cell_E
s.c	Proportion of viable seeds post-digestion
sdd.sp	List of named vectors with SDD probabilities for each cell output from sdd_set_probs
sdd.rate	Rate parameter for SDD exponential kernel
sdd.st	Logical denoting whether to implement short distance dispersal stochastically
edges	Character taking the value of one of: "wall", "sink", "none" where "wall" results in a dispersal probability of 0 for all out-of-bound cells with no populations modeled, "sink" results in dispersal of seeds to out-of-bound cells but no populations modeled, and "none" results in dispersal of seeds and populations modeled

Value

Tibble with grid id and number of seeds in each cell

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