1. What is this and why is it so important?
It is:
Krill
Keystone species
Overfished

2. Unsustainable use of Oceans
Lesson Objective:
To examine the impact of unsustainable use of the oceans on marine ecosystems
Key Terms:
Keystone Species
Food Web
Krill
Fish Farms
Eutrophication

3. What is unsustainable use?
Overfishing
Habitat destruction
Pollution

4. Overfishing Food web destruction Krill – keystone species Eaten by:
whales, penguins and fish.
Used for:
Omega 3 supplements
Fish farm food

5. Southern Ocean food web.
Why is Krill so important?
Answer Q 1pg 111

6. Eutrophication Nutrient overloading
The balance of nitrates, phosphates ammonia and chlorine is tipped and causes a loss of oxygen due to algal blooms.
Now answer the questions on the worksheet
Lesson 3 Extension activity worksheet.

7. What is the greatest threat to the oceans?
Answer Q 2 pg 111 using the following table format.
Threat
Reason 1 /score
Reason 2 /score
Reason 3 /score
Total
Habitat destruction
Overfishing
Pollution and siltation

8. Unsustainable use of Oceans
Did you achieve the aim?
Lesson Objective:
To examine the impact of unsustainable use of the oceans on marine ecosystems
In the back of your books, jot down at least two new things you have learnt or understood today.