Mary Ellen Hannibal's Why The Beaver Should Thank The Wolf

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“Why the Beaver Should Thank the Wolf” by Mary Ellen Hannibal, explains the impact wolves carry if they are ever extinct. Hannibal uses scientific data to explain to the audience the important a wolf has in the wild. Hannibal points out how fragile the food chain is, and when one player is out the who system tumbles down. Hannibal connects the action of the wolves in the wild and how it trickles down the food chain. Hannibal starts with the research done in Yellow Stone Park after wolves were removed from the park and then reestablish decades later. This help scientist see the changes that were happing as wolves started to reenter to food chain. Hannibal mentions that he vegetation has start to increase after the wolves were put back in the

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