Previous research on the effect of wolves on the food web has been criticized, raising questions about the predator’s role in the Yellowstone ecosystem.

A new peer-reviewed study reports that claims of a “world-leading” trophic cascade in Yellowstone National Park are not supported, citing problems with the methods used in earlier research. A newly pu ...

Scientists debunk decades-long study claiming wolves' reintroduction triggered a dramatic transformation in Yellowstone.

In Yellowstone National Park — where gray wolves were reintroduced starting in 1995 — researchers have gone back and forth on whether the restoration of wolves has impacted the ecosystem. The idea is ...

On four separate occasions, Wolf 907F seized power as the alpha female leader of the Junction Butte Pack in Yellowstone National Park. (National Park Service file photo courtesy of Jeremy ...

Three decades after wolves were reintroduced in Yellowstone National Park, aspen stands are recovering, a new analysis suggests. Published in Forest Ecology and Management, the study looks at what ...

Oregon State University researchers have documented the first new generation of overstory aspen trees in Yellowstone’s northern range in 80 years, three decades after wolves were reintroduced to the ...

When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how ...

Visitors from the North -- Web of life. Patterns in an ecosystem ; Living in a landscape of fear : trophic cascades mechanisms ; Origins : aquatic cascades ; Why the earth is green : terrestrial ...