In africa, grasses are the main vegetation in savanna communities. acacias and other trees are few and widely scattered. elephants range over very large territories and are not very abundant in any one location. however, they strongly affect the community by uprooting and consuming trees and shrubs, maintaining suitable habitat for grasses and grassland animals. many species of birds and insects live in the savanna grasses. which of the species or groups above would best be described as foundation species? birds and insects grasses acacia trees elephants