Extinction has always been a fact of life, but the arrival on the scene of humans has injected some novelty into the list of its causes. Overexploitation by hunting was probably the first of these, but more recently a large array of other impacts have been brought to bear, including habitat destruction, introduction of exotic pest species and pollution. Not surprisingly, conservation
... and to design nature reserves of the world's remaining species has come to assume great importance. Here we deal with the conservation of species populations, leaving the management of communities and ecosystems to Chapter 22.
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