Nature & science · Age 11 · Quarter 3 – Advanced Ecology
Removing a Top Predator: Trophic Cascades
Predict what happens to a food web when a top predator is removed.
Module
Quarter 3 – Advanced Ecology
Age
Age 11
Duration
10 min
Questions
5
What's in this exercise
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Question 1
Multiple choice
What is a 'trophic cascade'?
Question 2
Multiple choice
When wolves were removed from Yellowstone, elk populations grew and overgrazed river banks. What happened next?
Question 3
Multiple choice
When wolves were reintroduced to Yellowstone in 1995, what unexpected effect was observed?
Question 4
True or false
A keystone species is one whose removal would cause major changes to the structure of an ecosystem.
Question 5
Matching
Match each change in a food web to its likely knock-on effect.