猎豹的眼泪

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• My own perspective falls in between these diametrically opposed positions. Since subspecies have the potential to evolve into species or at least to acquire habitat-specific adaptations, their protection seems reasonable. Without recognizing these potentials we would not have a reason for protecting the Amur leopard, the Florida panther, the northern spotted owl, or the Asiatic lion. The genetic distinctions demonstrated between subspecies means that two populations have been isolated long enough to change and to adapt. For most subspecies, ones that have been isolated for less than 200,000 years, there is no cogent genetic reason for keeping them separate if they happen by chance to interbreed. However, neither is there any good reason to combine them because mixing would reshuffle the ge... (查看原文)

  * 2020-01-19 22:06:55