For over a millenia, fire shaped and maintained healthy forests in Southern Oregon. Lightning and humans set ground-hugging, beneficial fires, “good fire”, which maintained dry, open forests in a patchwork with moist, dense forests which survived repeated fires. Across the hills above Ashland, The Nature Conservancy and US Forest Service scientists found abundant trees with multiple fire scars— surviving 7 fires on average and up to 28 fires during their lifetime. The record reveals that fire burned somewhere in the Ashland watershed every-other year. Any patch of forest had a fire revisit almost every decade.
In the Ashland watershed, seedlings have grown unchecked among the larger trees—the legacies of frequent fire. Absent fire, young Douglas-fir and white fir packed in, and shaded out the bunchgrass and wildflower carpet, adding competition and stress on the legacy trees, now dying at accelerated rates. Burning in dense forest, a wildfire is prone to climb up through ladder fuels into the canopy and spread in unusually large patches of severe fire, killing even the fire-resistant legacy trees. Severe fire poses unnecessary risks not only to forest and wildlife, but to the city water supply, recreation, homes and businesses.
Forest thinning and fuel reduction with saws, helicopters, log trucks, and pile burns go a long way to re-establish desired forest conditions. It reduces the risk of severe wildfire, promotes forest resilience in the face of climate change, and sets the stage for the return of needed fire. Once treated, these forests vastly improve prospects for effective fire management, and open the curtain on the next act, bringing back good fire. AFR scientists and land managers will increase the use of controlled burns to restore and maintain forests and a more natural, beneficial fire regime.