Figure 1
From: Protecting endangered species in the USA requires both public and private land conservation
Null modeling results and endangered species richness within the USA. (a) Difference between the current number of endangered species with any part of their range inside highly protected areas and the average results of 1,000 random placements of those highly protected areas. Warm colors show regions that performed worse than a random placement, while cool colors indicate regions that performed better than random. Ecoregion data were obtained from The Nature Conservancy34. (b) Number of endangered tetrapod species per 5 km2 pixel, species distribution data were obtained from The USFWS Environmental Conservation Online System47.
