In Rockies/PNW, The More Recent The Forest Fire, The Worse The Odds For Forest Regrowth
EDIT
Among Stevens-Rumann,'s work was a 2017 study of nearly 1,500 sites charred by 52 wildfires in the U.S. Rocky Mountains. Her research found that lower elevation trees had a tough time naturally regenerating in areas that burned between 2000 and 2015 compared with sites affected between 1985 and 1999, largely due to drier weather conditions.
More recently, a 2019 study written by her colleague Kerry Kemp found that both Douglas fir and Ponderosa pine seedlings in the Idaho's Rocky Mountains — just south of B.C. — were also struggling in low-lying burned areas due to warmer temperatures, leading to lower tree densities.
Both studies attribute climate change to be the lead cause of why the trees are struggling to grow back in certain fire-scarred areas.
Stevens-Rumann says there are many similar forests facing the same challenges in B.C.'s Southern Interior, while repeat wildfires in the province are likely also to inhibit regrowth in many areas. As a result, some ecosystems will no longer be able to support tree species. Instead they may convert to grasslands, she said.
EDIT
https://www.cbc.ca/news/canada/british-columbia/charred-forests-not-growing-back-as-expected-in-pacific-northwest-researchers-say-1.5225825
