Global Vegetation 1. This biome is closely associated with the tropical wet-dry climate type which has a distinct dry season, and is located primarily in Africa and South America. Soil moisture in the dry season is not sufficient to support a full tree cover, hence this biome consists of trees widely spaced and much grassland in-between, called a savanna . A savanna is often described as having an open park-like appearance . Fire is very frequent here in the dry season, and limits tree growth by killing back the younger trees.
Mature trees are very fire resistant with very thick bark.
In Africa, the thorntree-tall grass savanna rings the savanna woodland, with acacia the dominant tree species. In general, the African savanna supports a wide diversity of plant and animal life, which include the grazers and their predators. Located principally in central North America, central Eurasia, and on the southeast coast of South America where it is called pampa . Best developed in the midlatitude and subtropical zones where distinct summer and winter seasons occur. However, no vestige of tall-grass prairie exists in North American as all of this has been transformed to agricultural land.