A. Trophic cascade: how animals change nature
Look at the picture illustrating the process of trophic cascade and explain in your own words what it is and how it works.
How wolfes have changed Yellow Stone's rivers
This may be one of the most important conservation concepts to come out of natural science in the last half century. The thing about this case study about wolfes in Yellowstone is that the same can be applied to apex predators around the world: lions in Africa, tigers in Asia. Sharks, bears, and wild dogs are all species sitting at the top of their respective food chains, creating stability amongst the species they prey on and maintaining the health of plants and animals right down the trophic ladder.
Watch the following video and answer the questions below
- What was the sequence of events described in the video?
- Do you believe that this is true? Why or why not
- Do you believe that this could happen here in France after the reintroduction of wolves? What about bears?
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