What are the main features of a Savanna ecosystem?

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The Chronicle

10th December 2003                                          40p                                                                            

                                                 Editor: Joe Ramage

Nakuru:

Problems, conflicts and solutions.

What are the main features of a Savanna ecosystem?

For most of the year in this part of Kenya, the climate is very warm and very dry. However for a short season of three months (April, May and June), there is abundant rainfall and then a shorter period known as the ‘little rains’ (November and December). Both of these periods of rain follow quite soon after the overhead sun has past right over the equator. The temperatures throughout the year are generally high, the cooler part of the year occurs when the sun is overhead in the opposite hemisphere. Most places in Kenya are too far inland to be affected by the sea, so most of the areas with this climate are upland areas with slightly reduced temperatures due to the high altitudes.

During the dry season the prevailing winds blow from the east allowing any moisture to be deposited before reaching western parts of the continents. The rainy season coincides with the sun, when it is overhead and the dry prevailing winds have reduced. Unfortunately the length of the rainy season and the amount of rainfall are unpredictable. While the heavy nature of the rain can do a lot of damage.

A climate graph of Nakuru.

The vegetation of this part of Africa is called Savanna. This mainly consists of tall grasses, bushes and scattered trees. The Savanna soils are very good at storing water from the wet seasons, no matter how hot it gets in the dry season. In the south, where the average amount of rainfall is higher, there are more trees. Further north where the dry seasons are longer and the rainfall is less, there are more grasses than trees. Where the Savanna blends with the tropical rainforest, there is dense woodland. Moving away from this the vegetation gradually changes to Savaana grassland with its scattered trees, then eventually changes again to bushes and grasses and then to desert.

The grasslands provide grazing grounds for many animals. The trees and bushes are a good food supply for zebra, wildebeest, elephants and giraffes. These animals will become the food supply for animals such as vulture, hyena, jackal and even the baboon.

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Britain ruled Kenya from 1895 until 1963. During this period Britain had a big say in the economic and cultural life of the Kenyans. Almost all Kenyans are black Africans, but there are 30 different ethnic groups now. One of these are the Maasai, they are pastoralists. Most Maasai live in an enkang which is a small village of about 20 houses. The huts are built in a circle and made out of wooden poles (frame), mud and cow dung (walls) and grass (roof). The men wear brightly coloured blankets while the women wear long lengths of cloth. Because of ...

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