savannas
Savannas Savannas are grasslands with scattered trees, and they are found in Africa, South America, and northern Australia Figure 20.18 . Savannas are hot, tropical areas with temperatures averaging from 24oC 29oC 75oF 84oF and an annual rainfall of 51127 cm 2050 in . Savannas have an extensive dry season and consequent fires. As a result, scattered in the grasses and forbs herbaceous flowering plants that dominate the savanna, there are relatively few trees Figure 20.20 . Since fire is an important source of disturbance in this biome, plants have evolved well-developed root systems that allow them to quickly re-sprout after a fire.