In the interior of British Columbia we had massive forest die-off from Pine Beetle, that was caused by a lack of fires combined with warmer than normal winters. All of that fuel came down to the forest floor where it was a huge fire risk and was cleaned up manually. Now we have some newer growth but way more open grassland. Fires here move a lot faster but don't tend to be as dangerous and controlled burns are much easier. Trees that survive are younger and much thinner coverage, way more deer and cougars and less bears; a lot more birds. It's been pretty unique to watch an entire ecosystem change in 10-20 years; much less than a lifetime. Plus it turns out that historically these areas were predominately grassland not forests!