Helper to calculate dissimilarities in loop

Usage

dis_loop(site_spp_list, icol, fcol, method = "jaccard", verbose = TRUE, ...)

site_spp_list: list of presence absence matrices for a set of sites or cells of a grid.
icol: number of column where the species list (other columns) starts.
fcol: number of column where the species list (other columns) ends.
method: (character) dissimilarity index to be passed to function vegdist. Default = "jaccard". See details.
verbose: (logical) whether or not to print messages about the process. Default = TRUE.
...: other arguments to be passed to function vegdist.

A list of results from vegdist.