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Fig. 4 | Forest Ecosystems

Fig. 4

From: Trees of Panama: A complete checklist with every geographic range

Fig. 4

Histogram of range sizes for all 3043 tree species in Panama (top) and for those 836 species identified in one of the plots (bottom), based on merged BIEN and Tropicos records. The far left bar (top panel) are those with too few records to calculate a polygon, for which the range was set to exactly 10 km2. Median range sizes were 6.9×105 km2 (all species), 4.1×105 km2 (non-plot species), and 2.5×106 km2 (plot species). The difference is highly significant (mean and confidence limits of the logarithm of range sizes were 6.15±0.067 for plot species, 5.32±0.063 for non-plot, based on t-statistics)

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