1. Topic 6: Oceans on the Edge
Unit 1 Revision
GCSE Geography

2. Practice Question – Describe the distribution of coral reefs. (2 marks)

3. What conditions do coral reefs develop in?

4. Coral reefs cover less than 1% of the earth’s surface and are located in areas with:
- Shallow water of 25m or less to ensure lots of light
- Tropical water temperature of 24-26°c
- Areas of saline water

5. Study this page for 30 seconds…

6. Explain 2 economic benefits of coral reefs. (4 marks)

7. Threats to coral reefs
Whilst watching the clip write notes explaining how coral reefs are at risk.

8. Threat to coral reefs include:
Population growth (more tourism, fishing)
Building on land (releases sediment into sea)
Dynamite fishing
Bottom trawling
Overfishing
Global warming

9. Management Options St Lucia –SMMA
Includes marine reserve (no fishing), permits for scuba/snorkelling, tourist permits, marine wardens.
Other areas of St Lucia do allow fishing
Is this SUSTAINABLE?

10. Fish Fight Overfishing is a global issue. Why?
What is the EU doing to try to control overfishing?
What can individuals do?

11. Practice question
A) Explain how marine ecosystems are threatened by human activity. (4 marks)
B) Using examples, explain how marine ecosystems can be managed in a sustainable way. (6 marks)