phyloraster: an R package to calculate measures of endemism and evolutionary diversity for rasters

With the increasing size and complexity of biogeographical and phylogenetic data, it is important to provide functions that allow the manipulation of these datasets efficiently and rapidly. The phylogrid package aims to facilitate the spatial analysis of measures of diversity and endemism. Our package provide a set of functions to join the results derived from species distribution models (SDMs) with phylogenies and endemism data. The functions are focused on pre-processing, processing and post-processing of macroecological and phylogenetic data. The pre-processing step offers basic functions for preparing the data before running the analyses. The processing step brings together functions to calculate Faith’s phylogenetic diversity, phylogenetic endemism, weighted endemism and evolutionary distinctiveness. This step also provides functions to calculate standardized effect size for each metric through different methods of spatial and phylogenetic randomization, aiming to control for richness effects. The post processing stage includes functions to calculate the delta of metrics between different times (e.g. present and future). We have shown that the package has a slightly longer computation time than comparable packages, but takes up a considerably smaller portion of RAM memory, which will allow users to work with high-resolution datasets from local to global scales. This enhances the application of the package by enabling users to work with large datasets on computers with less RAM available.