Threatened Species Richness

This layer shows the number of threatened amphibians, birds, mammals, reptiles and plant taxa whose distribution overlaps in each 10 km cell. Species ranges were rasterised at 1 km resolution from polygon maps from: • The IUCN Red List (IUCN Red List of Threatened Species (2019) Version 2019.2. www.iucnredlist.org [http://www.iucnredlist.org]); • The Global Assessment of Reptile Distributions (GARD) (Roll et al. (2017), Version 1.5, datadryad.org/stash/dataset/doi:10.5061/dryad.83s7k [https://datadryad.org/stash/dataset/doi:10.5061/dryad.83s7k]); and • The Botanical Information and Ecology Network (BIEN) database (Enquist et al. 2019 and Maitner et al. 2017, version 4.1. http://bien.nceas.ucsb.edu/bien/biendata/ [http://bien.nceas.ucsb.edu/bien/biendata/]).

Additional vascular plant species ranges were created from point data from the IUCN Red List, Botanic Gardens Conservation International (BGCI) (www.bgci.org [https://www.bgci.org/]), and the Global Biodiversity Information Facility (GBIF) (www.gbif.org [https://www.gbif.org/]). Species range maps were refined, when possible, by removing unsuitable areas using information on species’ habitat preferences and species' known altitudinal limits. This refinement process produced Areas of Habitat (AOH) maps for each species (Brooks et al. 2019).

Other References: • Brooks, T. M. et al. (2019). Measuring Terrestrial Area of Habitat (AOH) and Its Utility for the IUCN Red List. Trends in Ecology & Evolution 34:977–986. doi.org/10.1016/j.tree.2019.06.009 [https://doi.org/10.1016/j.tree.2019.06.009] • BGCI (2019). ThreatSearch online database. bgci.org/threat_search [www.bgci.org/threat_search.php]. • Enquist, B.J. et al. (In prep.). Botanical big data shows that plant diversity in the New World is driven by climatic-linked differences in evolutionary rates and biotic exclusion. • Jung, M., et al.(2020). A global map of terrestrial habitat types. Sci. Data 7, 256. www.nature.com/articles/s41597-020-00599-8. [https://www.nature.com/articles/s41597-020-00599-8] • Maitner, B.S. et al. (2017). The BIEN R package: A tool to access the Botanical Information and Ecology Network (BIEN) database. Methods in Ecology and Evolution; 9:373–379. doi/10.1111/2041-210X.12861 [https://besjournals.onlinelibrary.wiley.com/doi/10.1111/2041-210X.12861]