Listen to this 4-minute podcast to discover what a savanna is, where you can find savannas and what kind of life they support. Scroll down to see pictures and text that reinforce what is being talked about.
This podcast was compiled using information from the following sources:
University of California Museum of Paleontology . (n.d.). The grassland biome. Retrieved from http://www.ucmp.berkeley.edu/exhibits/biomes/grasslands.php
savanna. (2011). In Encyclopædia Britannica. Retrieved from http://www.britannica.com/EBchecked/topic/525656/savanna
Tobin A.J. &Dusheck J. (1998). Asking About Life. Orlando, FL: Saunders College Publishing.
Because savannas are dominated by grasses, periodic fires ensure that these grasses will not get shaded out by trees or shrubs. When fires occur in savannas, above-ground parts of plants get scorched. But plants have adapted to fires. They store energy in the form of starch in their underground roots. Once the fire is over and the rains come, the underground parts of plants send up new shoots. Grasses are the quickest to regrow.
Source: photo by cohdra at http://www.morguefile.com/archive/display/760968
Savannas are found in hot places. They experience two seasons: a hot, dry season when fires occur, and a hot, rainy season when plant regrowth can occur. Most savannas are found on the continent of Africa. You can find them in Australia, South America and India as well.
Source: savanna. [Map]. In Encyclopædia Britannica. Retrieved from http://www.britannica.com/EBchecked/media/46/Worldwide-distribution-of-savannas
Though life in the savanna varies depending on the continent, many savannas support grazing animals – called ungulates. These grazing animals provide a food source for large, meat-eating predators. Savannas also are home to large, flightless birds like emus in Australia and ostriches in Africa. Some of their smallest and most notable residents are termites which live in mounds that can be up to 21 feet high.
Giraffes are part of the hooved, grazing group of animals
called ungulates. Other ungulates include zebras, gazelles
and antelopes.
Lions and other large predators hunt ungulates as
their primary source of food.
Savannas also provide habitat for large flightless birds like emus in
Australia and ostriches in Africa.
Though small, termites can leave a big mark on the landscape
of the savanna. They build huge mounds up to 21 feet high.
Termites are an important food source for many birds and small
animals in the savanna.
Photos credits:
Giraffe in savanna by biberta at http://www.morguefile.com/archive/display/232326
Lion: by somadjinn at
Ostrich: by ardelfin at http://www.morguefile.com/archive/display/103741
Termite mound: by ciamabue at http://www.everystockphoto.com/photo.php?imageId=2595110&searchId=febeba49b49cd220207dd5c935090edd&npos=7