Research: Loss of large carnivores creates global conservation woes

CORVALLIS, Ore., Jan. 10 (UPI) -- A study involving Oregon State University researchers indicates how threats to 31 carnivore species combined to create global hotspot of carnivore decline.
Return of wolves to Yellowstone helping national park's grizzlies

Return of wolves to Yellowstone helping national park's grizzlies

CORVALLIS, Ore., July 29 (UPI) -- The return of wolves to Yellowstone is helping the national park's grizzly bears by restoring one of the staples of their diet -- berries, experts say.

Study: Loss of predators affects ecosystem

CORVALLIS, Ore., April 10 (UPI) -- The loss of large predators like wolves and a resulting rise in populations of moose, deer and other herbivores is disrupting ecosystems, U.S. researchers say.
Top predator loss causes major disruption

Top predator loss causes major disruption

CORVALLIS, Ore., Oct. 2 (UPI) -- The global decline of apex predators, such as wolves, lions and sharks, has led to a destructive surge in smaller mesopredators, scientists in Oregon said.

Wolf project considered in Scotland

CORVALLIS, Ore., July 21 (UPI) -- Introducing wolves to a test site in Scotland would establish a model for controlling the over-population of red deer, scientists in Oregon said.

Scientists: Predators needed in U.S. lands

SAN MATEO, Calif., June 22 (UPI) -- More large predators such as cougars are needed in wild lands in the western United States to enhance overall wildlife populations, two scientists say.

Loss of cougars changes Yosemite ecology

CORVALLIS, Ore., May 3 (UPI) -- Scientists said the disappearance of cougars from Yosemite National Park in the 20th century disrupted the entire ecology of the valley.

Wolves bring aspens back to Yellowstone

CORVALLIS, Ore., July 27 (UPI) -- U.S. researchers said the return of wolves to Yellowstone National Park has allowed aspen trees to grow there for the first time in decades.

Blue Planet: Who's afraid of Big Bad Wolf?

BOULDER, Colo., Feb. 23 (UPI) -- A series by UPI examining the relationship of humans to the environment. This week: Despite its longstanding bad reputation, wolves can work some wonders on local ecosystems.
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