Skip to main content
. 2005 Jul 19;3(8):e266. doi: 10.1371/journal.pbio.0030266

Figure 4. Comparison of Species Diversity and Geographic Sampling Area through Time.

Figure 4

Black lines and black boxes are time-series plots of occurrence-rarefaction species richness at 75 occurrences for each of the four biogeographic provinces. The numbers by the data points identify the time bins as indicated in Table 1; bin 1 is oldest and bin 14 is youngest. Gray lines and open boxes show the geographic area sampled for each time bin.

(A) Northern Great Plains (region 3 in Figure 1).

(B) Northern Rockies (region 2).

(C) Columbia Plateau (region 1).

(D) Coastal California (region 6).