The type of ants found in savannas in Australia, Brazil, and Africa are different because of the historical environments they evolved in. Australian ants are used to dry conditions, Brazilian ants are more sensitive to fire, and African ants are adaptable but lose diversity in drier areas. This means that land management and climate change will affect these ant communities differently in each region. The history of where these ants come from is important to understand how they respond to their environment.