ABOVE: Ponderosa pine and Douglas-fir forest in the Boise National Forest, Idaho, 22 years after it burned in the 1994 Idaho City Complex Fire
IMAGE COURTESY OF KIMBERLEY T. DAVIS
Soil, temperature, and humidity conditions driven by climate change have made it more difficult for Douglas fire and ponderosa pine seedlings to establish themselves after a forest fire, researchers reported yesterday (March 11) in PNAS. At some locations in the western US, a “critical climate threshold” has already been surpassed over the past 20 years, meaning forests may not return after wildfires.
“Maybe in areas where there are really abundant seed sources, there could be some trees, but it is becoming really hard to get these trees back due to climate change,” coauthor Kim Davis, a postdoc at the University of Montana, tells CNN.
Davis and her colleagues analyzed tree rings sampled from nearly 3,000 trees in the Rockies and California ...
