We'll adjust just fine, we'll wreck the natural ecosystem doing it but in fairness we already did that anyway, UN reckons we have 38% of the earths land mass under some form of agriculture.

Wild Earth is going away, Garden Earth is coming, the first planet we terraform as a species will be Earth.

Note: I'm not saying this is a good thing but we will survive as a species and I wouldn't bet against us thriving.