The great green wall of Africa, small scale ecosystem sand dune Ynyslas, Environment used for energy production Gwynt Y Mor offshore wind farm. Flashcards
What is the Great Green Wall of Africa?
A plan between 11 countries to plant trees 15 km wide and 8000 km long across the width of Africa.
What are the 4 aims of the Great Green Wall agreement?
- Local communities to plant native trees and bushes to prevent desertification and soil erosion
- Protect water sources such as Lake Chad
- Restore and create habitats for plants and animals
When was the agreement for the Great Green Wall signed?
2010
What two countries have made good progress with this project?
Niger & Senegal
Give 3 ways these countries have benefitted from this.
Increased crop yields
Better fed livestock
Trees provide medicines and firewood.
Why has the progress with this project been slow in the other countries that signed the agreement
Some local communities feel as though they have not been involved in the decision making as it is seen as top down development
They cannot imagine how their community might benefit.
What are sand dunes?
Accumulations of sand stabilised by vegetation
What two things do sand dunes need to develop?
Source of sand
Prevailing wind
The grains of sand can be stopped when they hit an object such as..
Seaweed or lump of driftwood.
What is an embryo dune?
The youngest dune at the front of the dunes nearest the sea
An embryo dune is characterised by pioneer plant species. Give an example.
Sand Rocket.
What are foredunes?
Older and higher dunes they are also known as yellow dunes or mobile dunes
What species of plants dominate for dunes?
Marram Grass
Where are fixed or grey dunes found?
Found further inland where conditions for plant growth improve
Why do fixed or grey dunes stop growing?
Because they lack wind-blown sand.
