but that would require major reworking of large areas.
Yes, that’s precisely what will be required. There’s no getting through this without implementing massive changes to our way of life. Everyone wants there to be some kind of easy get-out-of-jail-free card, but that’s not how it’s going to be.
Not true at all. There’s tons of adaptive pressure. If there weren’t, we wouldn’t see the thousands of pelagic and shorebird species that we do. But even if what you say about the threat from predation were true --its not-- there would still be adaptive pressure from differential reproduction rates and access to nutrients.