Fig. 3. Frequency histograms of (A) mean abundance, (B) environmental volume, (C) habitat occupancy, (D) regional range, and (E) continental range for 237 plant species sampled in the wet grasslands of the Sierra de Guadarrama. In (A) and (B), solid bars correspond to species with 100% of their environmental volumes occupied; open bars correspond to species with <100% of their environmental volumes occupied.