Human impact on Yellowstone national park?

Answer 1

National parks are created with the dual mandate of preserving the park's resources while providing for the enjoyment of the people. Unfortunately, people can "love parks to death" and mar the very beauty they go there to seek.

One example is Yellowstone National Park, where people throwing coins and trash into geysers and pools has clogged some of them to the point that the geysers stop erupting and the pools lose their colorful algae growths.

Another example would be the National Mall, where the grass has been so badly trampled that areas have had to be fenced off to let the sod recover.

The challenge for park managers is to balance protection with use. Heavily-trafficked trails might require boardwalks or barriers to keep people on the trail, for example.

Answer 2

GRAY WOLVES.

How do wolves in Yellowstone have impacted their environment is an evolving story, but federal biologists have tried to match what they predicted a decade ago in an Environmental Impact Statement, with what's happened regarding ungulate populations, hunter harvest, domestic livestock, and land use. Their research was published in the winter 2005 edition of Yellowstone Science. Authors include P.J. White, the park's ungulate biologist; Doug Smith, the park's wolf biologist; Terry McEneaney, the park's ornithologist; Glenn Plumb, the park's supervisory wildlife biologist; Mike Jimenez, the Wyoming wolf project leader for the U.S. Fish %26 Wildlife Service; and John Duffield, a professor of economics for the University of Montana.

Here are some of their findings:

--Wolves are altering the abundance, distribution, group sizes, movements and vigilance of elk. There are some indications that these interactions may be causing new growth in willows as elk are kept on the move by wolves and don't stay to browse in any one area very long.

--Elk are the primary prey for wolves, comprising 92 percent of kills during the winter.

--In the early stages of wolf recovery (1995-2000) predation effects were not detected because the elk count was similar to 1980-1994.

--Counts of elk decreased significantly from 16,791 in winter 1995 to 8,335 in winter 2004 as the number of wolves on the northern range increased from 21 to 106. Factors contributing to this decrease include bear and wolf predation, increased human harvests, winter-kill (1997), and drought's impact.

--Wolves have not reduced mule deer or bison populations. Mule deer remain within 1 percent of a 17-year average of 2,014 deer, while the bison population grew 15 percent. There are no reliable estimates of moose populations following wolf restoration. Moose represent less than 4 percent of wolf diets in winter and only 26 instances of wolf predation on moose were recorded in Yellowstone during 1995-2003.

--Kill rates by wolves in winter are 22 ungulates per wolf per year - higher than the 12 ungulates per wolf rate predicted in the ESA.

--Since 2000, wolves have caused 45 percent of known deaths and 75 percent of predation deaths (not including human harvests) of radio-collared female elk on the northern range. By comparison, human harvest and winter-kill accounted for 30 percent and 8 percent respectively of the known deaths.

--The average annual harvest of 1,372 elk during the Gardiner late elk hunts from 1995 to 2004 was higher than the long-term average of 1,014 elk during 1976-1994. Montana Fish, Wildlife and Parks has reduced antlerless permits by 51 percent from 2,882 to 1,400 during 2000-2004 and recently proposed 100 permits for 2006 - a 96 percent decrease from the 2,660 permits issued in 1995.In 2002 Gray wolves were attack so many Animals (elk,deer,Chipmunks,and humans).Then in a cold winter season So many wolves (58) were suffering from starvation,the colds,and Human.

Answer 3

Attention focused on Bear, Moose, Elk, and Wolf has deteriorated the animals' quality of life. While wolves HAVE been re-introduced to the park, there IS one pack "specializing" on Bison for prey. While it IS good that are eating SOMEthing, Bison is NOT what we want them to focus on, = Tourists wary.

Lightning strikes are still uncontrollable, = Tourists jumpy.

"Old Faithful"... isn't, = Tourists are not amused.

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