Spatially congruent sites of importance for global shark and ray biodiversity

remaining relatively low (Fig 6A–6C; S12A–S12C Fig and S13A–S13C Fig). For example, when redefining hotspots as the richest 10% of cells, the overlap increased slightly from 5.78 to 6.38% (S1 Table). Spatial overlap for the subset of threatened species reflected similar results between hotspot definition, again displaying a minor increase when the definition of hotspot was increased (Fig 6D–6F; S12D–S12F Fig and S13D–S13F Fig). For example, at 1˚ resolution, increases in spatial overlap between the 2.5% of richest cells, 5% of richest cells, and 10% of richest cells were minor (1.04%, 1.51%, and 1.93% overlap, respectively; S1 Table). Fig 2. Spatial congruency (measured as percent overlap) of shark hotspots between three species richness measures: Total species, evolutionary distinct (ED) species, and endemic species. Congruency shown for hotspot definition of the richest 5% of cells and three levels of spatial resolution: 1˚, 4˚, and 8˚. The subsets of threatened species across species richness measures are indicated in red. https://doi.org/10.1371/journal.pone.0235559.g002 PLOS ONE Spatially congruent sites of importance for global shark and ray biodiversity PLOS ONE | https://doi.org/10.1371/journal.pone.0235559 July 6, 2020 6 / 19