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 15km wide and 8000km 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 the Great Green Wall project?
Niger & Senegal
Give 3 ways these countries (Niger and Senegal) have benefitted from this (the Great Green Wall project).
- Increased crop yields,
- Better fed livestock,
- Trees provide medicines and firewood.
Why has the progress with the project been slow in the other countries that signed the Great Green Wall 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 foredunes?
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.
