Summary
The diversification of the species of the Equinae emerged some 18 million years ago with 140 species, currently only seven remain: the kiang, the Przewalski horse, the Grévy zebra, the plains zebra, the mountain zebra, the Asian wild ass and the African wild ass.
The classical theory suggested that this explosion was linked to the appearance of grasslands where grasslands predominate, now, however it is known that it is due to environmental factors, such as climate changes. The horses emerged in North America then moved to Eurasia through the Bering Strait and from there to Africa.
In conclusion,what is believed to have happened, as indicated by the paleontologist and his colleagues, is that environmental factors, such as climate changes, generated fragmented ecosystems with enough food to sustain a multitude of isolated and genetically different populations, although physically similar.
Vocabulary
Flooding: Inundació
Droughts: Sequeres
Mammals: Mamífers
Opinion
This news is a clear example of the consequences of climate change. If there had not been said change we would now have many animal spices.
From these conclusions we can affirm that biodiversity requires study in its entirety and with its three levels of organization: genetic, specific and ecosystemic
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