“It’s highly likely that many of the giant sequoias in their current groves may not make it for the next century,” Park Williams, a climate scientist at the University of California, said. He notes that the soil is becoming drier in the southern Sierra Nevada, and snowpack is disappearing earlier in the year, ushering in a longer dry season. …The question is what, if anything, can be done to prevent a raft of extinctions driven by our remaking of the earth’s climate. For Milarch, the answer was clear. He ascribed to something called “assisted migration”: moving species to more hospitable areas. …Redwoods may be a perfect candidate for assisted migration. They are relatively slow to colonize new territory and, thanks to their size, very conspicuous. …The concept of assisted migration, even if no panacea, at least acknowledges the increasing fluidity of the world. [to access the full story a NY Times subscription is required]