Global squamate presence-absence matrix

This dataset contains a global presence-absence matrix for 10,215 species of terrestrial squamates (lizards and snakes), constructed from the GARD 1.5 species range shapefiles. Suitable for global diversity analyses using the R package LetsR. It consists of a list including three elements (1) a presence-absence matrix for all 96x96 km global terrestrial grid cells (48800 grid cells have at least one species), (2) a raster summarizing global richness patterns, and (3) a list of species. Methods This dataset was constructed from the GARD 1.5 squamate species range shapefiles (https://doi.org/10.5061/dryad.9s4mw6mh3) for 10,215 terrestrial species of squamates using the R package LetsR v 4.0 (Vilela and Villalobos 2015). The range shapefiles were projected onto an global Behrmann equal area projection map, and then converted into a presences absence matrix using the "lets.presab" fuinction in LetsR. Cited: Vilela, B., & Villalobos, F. (2015). letsR: a new R package for data handling and analysis in macroecology. Methods in Ecology and Evolution, 6(10), 1229-1234.