It is sometimes supposed that a rare species must be a threatened species. This is a mistake. In On the Origin of Species (1859), Charles Darwin observed that `Rarity is the attribute of a vast number of species in all classes, in all countries'. Indeed, in most biotas studied, many if not most species are rare. That is, a few species tend to be very common… (More)
DOI: 10.1023/A:1018325310875


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