As with the loss of old-growth forests that's happening today, we risk species loss, and hence biodiversity. Re-population is predicated on an extant populatio

As with the loss of old-growth forests that's happening today, we risk species loss, and hence biodiversity. Re-population is predicated on an extant population, a return to suitable conditions, and for the pioneer species to die off. The problem is that, in sustained adverse conditions, the pioneer species may outlive the surviving population of the threatened species.