What would likely happen if all of the elk in Yellowstone park were removed?

If elk were removed from the park or the population were to decrease, the populations of the elk's predators would be affected. For example, if the population of elk were decreased by disease or natural disaster, wolves and coyotes, would experience difficulty finding elk to feed on.



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Yellowstone wolves may kill up to 2,156 elk in the park each year and as many as 11,600 in the Greater Yellowstone region, according to figures derived from 20 years of wolf study in the park.

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If another large, caldera-forming eruption were to occur at Yellowstone, its effects would be worldwide. Such a giant eruption would have regional effects such as falling ash and short-term (years to decades) changes to global climate.

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A Yellowstone National Park bull elk known as No. 10, for its ear tag, apparently was killed by a vehicle in the park over the weekend. An internationally famous Yellowstone National Park bull elk has died, probably after being struck by a vehicle.

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Coyotes, bobcats, and black bears may kill young, sick, or injured elk, but adult elk are generally safe from predators in the park. Gray wolves and mountain lions, both of which have been extirpated from the Great Smoky Mountains, are successful predators of elk elsewhere.

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In 2020, a 3-year-old suffered second-degree burns on the lower body and back, and a tourist who entered the park illegally fell into a thermal feature near Old Faithful.

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However, Yellowstone is also an active geothermal area with hot springs emerging at ~92°C (~198°F) (the boiling point of water at Yellowstone's mean altitude) and steam vents reported as high as 135°C (275°F).

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