Fortunately, this pessimism is probably unjustified because ecosystems have enormous powers of recovery from traumatic damage.
Ecosystems possess several mechanisms for self-healing.
Among people, the outcome of wooing can be rich, satisfying, and lastingly successful only if both partners are modified by their association so as to become better adapted to each other. Furthermore, the outcome is more interesting when both partners retain elements of their individuality - their own wildness. The Cro-Magnon who slew the last mammoth thought only of steaks. The sportsman who shot the last Passenger Pigeon thought only of his prowess. The sailor who clubbed the last auk thought of nothing at all.