Fragile environments. The next 4 weeks. Key Idea – only the one. Environmental abuse has serious consequences. Its causes need to be tackled to ensure a more sustainable future. But there are still 3 sections to study …. Section 1 (already covered).
The next 4 weeks
Lack of vegetation cover
Population increase which puts more pressure on the land
Ripe for soil erosion – why?
Next step – desertification
Over 20% of the world’s population are coping with desertification in about 60 countries
Please be aware the rainfall part of the climate graph in the textbook on p184 is WRONG. It shows rain during the February to March!
Its natural vegetation is savanna – mainly grass with trees and shrubsThe Sahel
In which months were these 2 taken?
On the southern edges there are more trees and less grass and there are more wild animals – lions etc
Towards the middle there are large herd of gazelle and giraffe ( the book says zebra! It is too far North for them).
Some are under threat as they are in competition with the farmers who are growing crops.
Nomadic herders with goats and cattle follow the rain.The Sahel
If there are dry years, then the plants do not have the chance to regenerate and there is more soil erosion, and a greater chance of desertification.
Can you work out what this graph is saying about rainfall in the Sahel?
Can you explain why there are greater worries about the Sahel becoming part of the Sahara.
What are the 2 possible causes of this?
Which do you think is most likely?