Fire experts prescribe Indigenous cultural burns to reduce wildfire risk in B.C.
Wildfire experts say British Columbia must spark far more prescribed burns, akin to how Indigenous communities have managed forests, to mitigate the risk of huge blazes.
“We’re not burning anywhere near as much as we should,” said fire ecologist and noted burn boss Bob Gray, from Chilliwack, B.C., who consults for local, provincial, state and tribal governments across Canada and the United States.
B.C. should be burning tens of thousands of hectares every year to reduce dense forests packed with fallen branches and leaves, said Gray, but the Forests Ministry said it burned an average of 5,000 hectares annually from 2010 to 2019.
As a member of a research team with the U.S. Forest Service in Washington state, Gray has studied what forests and wildfire behaviour were like when Indigenous burning was widespread, he said in an interview.
Talking with Indigenous elders about when and where they burned, examining early aerial photographs and comparing that information with physical signs of fires on trees, reveals a “mosaic” on the landscape with smaller burned patches, meadows, larger and more widely spaced trees and diverse vegetation, he said.
Gray likened wildfire to a contagion that can be mitigated through inoculation.
“There was so much burning going on and it resulted in all kinds of different vegetation types, and many of those just didn’t carry fire very well,” he said. “And so that historic landscape was basically vaccinated against largespread fire.”
The wildfire that destroyed most of Lytton, B.C., last month has shone a spotlight on the government’s strategies for preventing and managing increasingly intense wildfires that Gray said will only become worse with climate change.
Amy Cardinal Christianson, a fire research scientist with the Canadian Forest Service, said reducing fuel was a “perk” of Indigenous burning, but it was driven by cultural purposes - often to improve berry harvesting or hunting conditions.
Setting fire to a meadow in the early spring to burn off dead grass, for example, could produce healthy vegetation that attracted moose and other animals to the area, said Christianson, who is Metis from Treaty 8 territory in northern Alberta.
Cultural burning was a family practice, and in some Indigenous communities, fire keeping was a specific expertise and role passed through generations, she said.
Fire keepers look for cues, such as plump spruce needles or berries sprouting in spring, to determine whether it was an appropriate time to ignite a fire, she said.
Settlers brought a European mindset for land management that suppressed fire, allowing trees and fuel to encroach on the “mosaic,” said Christianson, adding Indigenous elders recall people being fined or jailed for sparking cultural burns.
Fire suppression followed settlers west, she said, and regular cultural burning was still happening in more remote areas of B.C. up until the 1950s and 1960s.
Indigenous communities still experience barriers to cultural burning, said Christianson, pointing to lengthy approval processes and a lack of sustained funding to support knowledge transmission between elders and a new generation of fire keepers.