猫狗之争：从进化角度看猫科比犬科更好_时事

猫狗之争：从进化角度看猫科比犬科更好

The dog family – which includes the wolves from which today’s domesticated dogs are descended – originated in North America about 40 million years ago and reached a maximum diversity around 20 million years later, when there were more than 30 species on the continent. At that point, the cat family arrived from Asia.

犬科家族——包括现在的驯养狗的祖先狼——起源于约4000万年前的北美洲，在大约2000万年后达到了物种多样性的巅峰，当时在北美洲有超过30个犬类物种。与此同时，猫科动物也从亚洲来到此地。

"The arrival of cats to North America had a deadly impact on the diversity of the dog family. We usually expect changes in climate to play the overwhelming role in the evolution of species. Instead, competition among different carnivore species proved to be even more important for the dogs," said the report’s lead author, Dr Daniele Silvestro, of the University of Lausanne inSwitzerland.

这项研究报告的第一作者、瑞士洛桑大学(University of Lausanne)的达妮埃尔·西尔韦斯特罗(Dr. Daniele Silvestro)博士表示：“猫科动物的到来给犬科动物的物种多样性造成致命打击。我们通常预计气候变化会在物种进化过程中发挥最重要的作用。但对于犬科动物来说，不同食肉动物物种间的竞争被证明是更重要的。

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