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I think that wolves in Yellowstone are in danger because they are getting killed outside of the park.  a record 4.25 million people visited Yellowstone National Park in 2016 These visitors spent $524.3 million in communities near the park. Gray wolves were listed as endangered under the Endangered Species Act in 1974, paving the way for their reintroduction to Yellowstone National Park and central Idaho in 1995.In 1973, a federal law was enacted to protect endangered and threatened plants and animals, as well as the habitats in which they live.

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In 1973, a federal law was enacted to protect endangered and threatened plants and animals, as well as the habitats in which they live. The development of this law, known as the Endangered Species Act (ESA), was guided by an ethic new to conservation at the time, that healthy landscapes depend upon the presence of native plants and animals.

In addition to providing protection from extinction, the ESA also mandated that species nearly eliminated be restored to their historic lands. This opened up the possibility of reintroducing animals lost from the American landscape as a result of human activity, like the gray wolf.

In 1974, Congress listed the gray wolf as endangered under the ESA. However, it wasn't until two decades later that wolves were finally restored to their former habitat in the American West. In 1995 and again in 1996, gray wolves were captured in Canada and relocated to Yellowstone National Park and central Idaho.

Since reintroduction, wolves have dispersed throughout the region, returning to ecosystems that had long suffered in their absence. They are currently found in Idaho, Montana, Wyoming, Washington, Oregon and Northern California. Still, they have not yet been reestablished in the wild areas of their former range: Colorado, Utah, Nevada and large portions of other Western states where the wolf population stands at zero.

Historically, species have been "delisted" (or removed) from the list of endangered species once they've made a broad-scale recovery throughout their historical range. Delisting has been based on carefully made, evidence-based decisions. Not so for the wolf. In spring of 2011, Congress removed Endangered Species Act (ESA) protections for wolves in Idaho and Montana with an 11th hour Congressional rider attached to the federal budget bill... a must-pass measure that had nothing to do with wolves. In the face of a government shutdown, the delisting of wolves was never discussed, as the budget bill was fast tracked. Politics derailed science, the legal process outlined by the ESA was ignored, and now almost all wolves have been delisted nearly everywhere they live, with no scientific or legal justification.

In 2013, the U.S. Fish and Wildlife Service proposed removing federal protections for gray wolves (Canis lupus) throughout their historic range in the lower 48 states. Since wolves have not yet returned to all of their historic range, they face a premature ending to a recovery far from complete. The law clearly states that these decisions must be based on "the best available science," so an independent peer review was enlisted to evaluate the scientific integrity of the proposed delisting rule. That peer review unanimously found that the rule was not based on the best available science. The ruling, however, was not rescinded. The final decision as to whether or not this proposal will become law is still pending.

Gray wolves are currently only protected by the federal ESA in Oregon and Washington's Cascade Mountains (where 2-4 packs currently live), in Wyoming, the Great Lakes region, and for the critically endangered Mexican gray wolf in Arizona and New Mexico. Federal ESA protections were reinstated for wolves in Wyoming in September 2014 by U.S. District Court's Judge Amy Berman Jackson's ruling which found that the state of Wyoming's wolf management plan was flawed and irresponsible, treating wolves as "vermin" to be killed-on-sight year round without limit or need for a license in 83% of the state. Federal ESA protections for gray wolves were similarly reinstated in the Great Lakes region (including Wisconsin, Minnesota, and Michigan) in December of 2014 by U.S. District Judge Beryl Howell who ruled that the U.S. FWS decision that prematurely removed ESA protections for gray wolves in the region in 2102 was "arbitrary and capricious" and violated the ESA. Representatives from Wyoming, Minnesota, Wisconsin, and Michigan, in response to these Federal court decisions, introduced bills to legislatively remove ESA protections for gray wolves in Wyoming and in the Western Great Lakes region and to make wolves in these places permanently ineligible for protection under the ESA.

The gray wolf was brought back by the mandate of the ESA, with our federal tax dollars. They live on federal lands, land that belongs to us all. We all have a say in the future and well-being of this animal and an obligation to guarantee its safety. Wolves need your support, learn how you can help and who to contact.

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The Political Debate about Wolf Reintroduction - Living with Wolves

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In 1973, a federal law was enacted to protect endangered and threatened plants and animals, as well as the habitats in which they live. The development of this law, known as the Endangered Species Act (ESA), was guided by an ethic new to conservation at the time, that healthy landscapes depend upon the presence of native plants and animals.

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Tourism to Yellowstone National Park Creates $680.3 Million in Economic Benefits - Yellowstone National Park (U.S. National Park Service)

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The peer-reviewed visitor spending analysis was conducted by economists Catherine Cullinane Thomas of the U.S. Geological Survey and Lynne Koontz of the National Park Service. The report shows $18.4 billion of direct spending by 330.9 million park visitors in communities within 60 miles of a national park.

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the everglades have  a very large population. Some of the predators are the python's and alligators ect. But python;s aren't supposed to be their and people have documented python's consuming the alligators. In this ecosystem the python is the predator and the alligator is the prey but there are smaller kinds of prey there like the little fish, worms etc. when the python is were it's not supposed to be there will be limited resources  like prey and any other animals etc. the python need's a bigger carrying capacity because they are very tarrortal and they are definitely affecting the everglades that's why they are getting smaller.          the python's food is decreasing and the python population is growing and increasing . global warming can affect the coral reefs because the climat can kill the animals and that would disrupt the food chain/ food web.That would lead to destruction to the corals and the life of animals

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Throughout the past 40 years, populations of Elk, Moose, Wolves, and Willows have changed in the Yellowstone area. Elk and willows play a critical role in wolves' success in the Yellowstone National Park ecosystem, willows serving as browse for elk--and elk as food for wolves.But there's another species involved, one that's instrumental to these well-choreographed steps: the beaver.
"Beavers are the missing piece in this ecosystem," says ecologist Tom Hobbs of Colorado State University (CSU) in Fort Collins.
There are an estimated 7,000 to 11,200 gray wolves in Alaska, 3,700 in the Great Lakes region and 1,675 in the Northern Rockies.

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the wolves help balanced and the wolves keeped the elk from over populating. with elk not overpopulating and eating so much, the willows were allowed to grow bigger and healthy. This in turn, allowed the beavers to populate from 1 group to 9 groups . SO the introduction of the wolves into yellowstone helped balance out the yellowstone ecosystem.

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Elk are running over the willows and they aren't producing the ground in place and to keep the river from erotting/ moving away.  But ever since we put the wolves back in. and the wolves were eating the elk so the elk didn't keep eating the willows