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In the past 40 years the hunters have killed all the wolfs in yellow stone this would be a big impact because the elk would eat all the willows and the beavers would not have enough food to survive the winter and to build there homes.   There was hardly any singing birds in the video also there were barely any food left for the elk  because the elk are eating all the  willow trees and the willow can't produce food .But when they brought back the wolfs they started to chase elk and put them on the move, while the elk are always on the move the plants and willows would start to grow and able to feed the life that is in yellow stone park .The wolfs were important to yellow-stone and now there are about 150 wolfs in yellow stone park and now there are about 15 packs of wolves in yellow stone .

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Limited resource , wolfs ,elk, moose ,willows , and beavers 

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Limited resource , wolfs ,elk, moose ,willows , and beavers 

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All animals have limited resources

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Beavers do not separate because they work together as a colonies to build there homes .

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Beavers use to stop the water from flowing .

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Beavers use to stop the water from flowing .

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Beavers use willows to stop the water because the willow trees are stronger ,it can stop the water from breaking through there dam that they have made .

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"Where their preferred plants are few or absent, beavers may cut conifer trees and feed on submerged vegetation such as pond lilies".

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"Willow Park (between mammoth and Norris), beaver ponds ,( mammoth area), Harlequin lake ,(Madison area ) and the  Gallatin River along the U.S. 191".

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Wolves eat elk , ground hog,rabbits wolves stay in 10 packs.

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In 2017 the wolf population increased to 99 and 10 wolf packs .

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Yellowstone started a predator control program because of “forest fire suppression, and restrictions on moose hunting, contributed to their subsequent range expansion and increased numbers”.

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What Moose eat , and how many herds they have 

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What Moose eat , and how many herds they have 

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Moose eat "aquatic plants like water lilies,Duckweed,and bur-weed".  "But the principle staples of the moose diet are the leaves and twigs of the willow, followed by other woody browse species such as gooseberry and buffalo-berry”.Moose either stay alone or stay in a family herd but they do not stay in herds.

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The moose population are scarce because in Yellowstone park they could be seen in, Marshy area, Lake shores , and along rivers .Ticks are some that bring down the moose population because they carry diseases .Also forest fires are reasons of bringing moose population cause they have to travel somewhere else .

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What Elk eat,and how many herds they have .

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What Elk eat,and how many herds they have .

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Elk eat grass,trees,plants,and herbs.
Elk have up to 6-7 herds .

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There will be around 10,000-20,000 elk in yellow stone park but in the winter there would be 5,000 elk left .

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          40 Years  of             population .

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          40 Years  of             population .

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Yellowstone Park. Animal population .