Skip to main content
. 2001 May 8;98(10):5661–5666. doi: 10.1073/pnas.091100998

Figure 1.

Figure 1

Latitudinal (Left) and longitudinal (Right) gradients in observed and simulated species richness of breeding birds endemic to Africa. (A and B) Observed and simulated band sums (means from 100 runs, error bars too small for display) using observed 1-D range extents. (C and D) Observed and simulated band sums (means from 100 runs, error bars too small for display) using observed 2-D range sizes. (E and F) Mean species richness per quadrat (±SE) of observed and 2-D simulation data (means from 100 runs).