This function generates random species distributions in geographic space as extent of occurrence range polygons based on convex hulls of random points.
random_species(n, species, pol,...)
Arguments
n: vector of one or more elements to choose from, or a positive integer.
species: the desired number of species.
pol: the vector polygon of the study area for determining the species distributions
...: Further arguments passed to or from other methods.
Returns
A vector polygon of species' extent of occurrence ranges.