Wildfires Turn 1,700 Sierra Nevada Acres Into Shrubland as 40% of Western Conifers Face Loss by 2100
Updated
Updated · The New York Times · Aug 23
Wildfires Turn 1,700 Sierra Nevada Acres Into Shrubland as 40% of Western Conifers Face Loss by 2100
1 articles · Updated · The New York Times · Aug 23
Summary
Roughly 1,700 acres on the western slope of California’s Sierra Nevada have shifted from ponderosa pine forest to bare shrubland, a change scientists say is permanent.
Bigger, hotter fires and a warmer climate are driving the conversion across the West, hitting conifer forests that did not evolve to withstand such high-intensity blazes.
Recent studies estimate up to 40% of Western conifer forests could become shrubland by 2100, extending the shift from Oregon to New Mexico.
As trees disappear, snow melts faster and soils dry out sooner, threatening wildlife and worsening water stress in states that get as much as 75% of their water from snowmelt.
As Western forests permanently vanish into shrubland, how will millions survive when their natural snowpack water supply disappears forever?
With up to 40% of Western forests doomed by 2100, what hidden ecological consequences await species forced to abandon their ancient habitats?
If decades of fire suppression fueled today's infernos, could intentionally burning our remaining forests be the only way to save them?
The Sierra Nevada’s Zombie Forests: How 1 in 5 Conifer Stands Are Doomed by Climate Change and Mismanagement
Overview
The Sierra Nevada’s conifer forests are facing a crisis driven by rapid climate warming and over a century of fire suppression. As the climate warms, about 20% of these forests have become 'zombie forests'—mature trees that can no longer reproduce because their climate niche has shifted upslope much faster than the forests themselves. Decades without natural, low-intensity fires have left forests overcrowded and packed with fuel, making them highly vulnerable to severe wildfires. When these intense fires strike, they cause permanent ecological changes, turning forests into shrublands, slashing carbon storage, degrading water quality, and threatening wildlife and communities downstream.