Ecosystems GCSE

1. DESERTIFICATION DEFINITION process by which the land is turned to desert CAUSES NATURAL – climate HUMAN – non-sustainable farming methods . HUMAN LAND USES ARABLE FARMING – vegetation cleared for crops e.g. millet, maize. CATTLE FARMING _ cows graze on grass. CASH CROPPING – Large expanses used e.g. tobacco and cotton. TOURISM – Safaris.

2. The Sahel

3. Desertification ~ the process More food, fuel & housing needed Population growth Grassland is overgrazed Soil becomes bare Soil is eroded by wind & water Trees are cut down Land becomes infertile No plants grow Land becomes desert Climatic change Less rain

5. CONFLICTS CASH CROPPERS v SMALL SCALE FARMERS. CONSERVATIONISTS V POACHERS. 3 MAIN CAUSES OF DESERTIFICATION. Climate change. Increased population. Commercial Agriculture.

8. NON-SUSTAINABLE FARMING CAUSES DESERTIFICATION OVERGRAZING OVERCULTIVATION . SOIL EROSION IS TURNING LAND INTO DESRT THESE LEAD TO SOIL EROSION

10. Living with wet season/dry season regime The purpose of this exercise is to show that farmers of the savanna are seriously influenced by the climate and river regimes found in this ecosystem Location: