How Wolves Change 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 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 among the species they prey on and maintaining the health of plants animals right down the trophic ladder.

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