In one of the most remarkable ecological comebacks in modern conservation, grey wolves—reintroduced to Yellowstone National Park in 1995—have played a key role in regenerating aspen forests that had gone dormant for over 80 years.
A new study published in Forest Ecology and Management reveals that, decades after stagnation, nearly one-third of aspen stands in Yellowstone's northern range now contain thriving tall saplings—contrasting sharply with the 1990s, when not a single tall sapling was recorded.
