Ecology
Density-Dependent Factors Density-dependent factors involves competition, predation, disease and space limitations. More intense competition is between zebras, gazelles and wildebeests who are competing for the same resources of food and water. Predators of zebras are lions, cheetahs, hyenas, wild dogs, leopards and crocodiles. The risk of disease may increase due to drought when animals have to share the remaining sources. Space limitations have been increasing since human encroachment is also increasing on the zebra's habitat. |
Density-Independent Factors
Density-independent factors decrease population size such as natural disturbances. Drought is a prolonged period of abnormally low rainfall. This can drastically affect the Plain Zebras since this species is the most dependent for fresh water. It can cause the density-dependent factor of disease to increase with the congregation of animals at the most available water supply. On the other hand, durations of excess rain allow savanna grasses to grow quickly and more foals are born during this season. However, the rain can cause areas in Africa to become tropical forests and this habitat is unsuitable for zebras to live in. |