FIGURE 21.4 Habitat size and species richness. Species richness increases as the size of the habitat increases. In this example, researchers counted the number of bird species that inhabited reed islands in Lake Velence, Hungary. As island area increased, the number of bird species initially rose quickly and then began to slow.
(Data from A. Baldi and T. Kisbenedek, “Bird species numbers in an archipelago of reeds at Lake Velence, Hungary,” Global Ecology and Biogeography 9 (2000): 451–