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Most (not all) of these forests are meant to burn; always have; are highly adapted for it; without fire, often drift towards a different, less regionally diverse ecological state. They're just not meant to burn super-dry, super-hot and all at once. And they're now fragmented.
...So that distant faunal repopulation of burnt areas is restricted or prevented. The combination of intense, near complete burning and restricted repopulation looks potentially disastrous. (Could be wrong of course. Some systems turn out to be remarkably resilient. Others, not.)
