Ecosystems 7

Year 10 Topic 2 – Learning Opportunity 7: Human Impact – Fish Farming.
This learning opportunity has 6 tasks to complete.
Target time: 50 minutes.

By the end of this learning opportunity you will be able to: explain the positive and negative human interactions within ecosystems and their impacts on biodiversity, including fish farming.

Key words: fish farming, biodiversity.

Task 1: Fill in the gaps to define fish farming. Watch the video until 3.30 minutes to help you.

Fish farming involves growing _____ kind of fish in pools or pens, made of ______, within lakes or the ______. The fish are usually to be caught as ______ for humans.

Find the answer at the end of the blog.

Task 2: Sort the statements into two lists to show the advantages and disadvantages of fish farming.

Find the answers at the end of the blog.

Task 3: Highlight the statements in each list which would increase the biodiversity in an area. Use another colour to highlight statements in each list which would decrease the biodiversity in an area.

Hint – Biodiversity is the variety of living things in an area.

Find the answers at the end of the blog.

Task 4: Write 2 sentences to answer the question below.

What would happen to the wider ecosystem if farmed fish were to escape and enter the food web?

Find the answer at the end of the blog.

Task 1: Answers

Fish farming involves growing one kind of fish in pools or pens, made of nets, within lakes or the sea. The fish are usually to be caught as food for humans.

Tasks 2 and 3: Answers

Left = Advantages, Right = Disadvantages
Green = Increase biodiversity, Purple = Decrease biodiversity

Task 4: Answers

If a farmed fish escaped it would disrupt the natural food web. The farmed fish may be a predator of wild fish and so could reduce their number. This would also reduce the number of other wild fish which usually eat them due to lack of food. Alternatively, the escaped fish may provide food for one type of wild fish, increasing their number, but in turn decreasing the number of other wild fish due to increased predation.

Task 5: Complete the quiz using the link below.

Quiz

Challenge Task: Complete the exam question below.

Challenge Task: Answers

End of Learning Opportunity 7