Global warming is a likely suspect for changes in the insect ecology that happen faster than any forest can adapt, such as beatle infestation. Some species may profit by, for example, surviving winters that would usually kill them in large numbers. Even more species might suffer, either because they are eaten by the former, or because their lifecycle may require harsh winters.
Of course other factors than just temperature are swinging widely: California is probably drier than before. Increased winds may make fires more likely etc.
Other natural phenomena also don’t respect entry bans: invasive species come to mind, and so does pollution.
I don’t claim to know if interventions are helpful, nor if they could ever be helpful enough to make a real difference. And of course nature will survive, and even forests may eventually adapt to the new regime. But of course the knowledge that there will again be a forest in that location in a millennium or three is of little help to someone who wants to show their grandchildren an old-growth first.
Of course other factors than just temperature are swinging widely: California is probably drier than before. Increased winds may make fires more likely etc.
Other natural phenomena also don’t respect entry bans: invasive species come to mind, and so does pollution.
I don’t claim to know if interventions are helpful, nor if they could ever be helpful enough to make a real difference. And of course nature will survive, and even forests may eventually adapt to the new regime. But of course the knowledge that there will again be a forest in that location in a millennium or three is of little help to someone who wants to show their grandchildren an old-growth first.