column_name,type,description location,character,name of the field site visit_id,numeric,unique identifier for each sampling visit within a site bwg_name,character,unique identifier for the species name mean_local_abundance,numeric,mean local abundance of the species at occupied bromeliads relative_occupancy,numeric,proportion of occupied bromeliads by the species OMI,numeric,the niche position for a given species at a given site Tol,numeric,the niche breadth for a given species at a given site functional_distinctveness,numeric,the average difference in functional trait composition of a species given all other species in a site