稀有是所有国家所有纲的大量物种的属性。
‘rarity is the attribute of a vast number of species of all classes, in all countries’
--Darwin 1859《物种起源》
Darwin还强调了理解生物学中稀有机制和物种分布的相关性:
谁能解释为什么一个物种分布范围广且数量众多，而另一个近缘物种却分布范围窄且稀少?这些关系非常重要，我相信它们决定着这个世界上每一个居民现在的福祉，以及的未来的成功和变化。
‘Who can explain why one species ranges widely and is very numerous, and why another allied species has a narrow range and is rare? Yet these relations are of the highest importance, for they determine the present welfare, and, as I believe, the future success and modification of every inhabitant of this world’
--Darwin 1859《物种起源》
From:
Francisco Pascoal, Rodrigo Costa, Catarina Magalhães, The microbial rare biosphere:current concepts, methods and ecological principles, FEMS Microbiology Ecology,fiaa227, https://doi.org/10.1093/femsec/fiaa227
