What is the big American exchange?
A large American exchange may sound like a kind of highway, but in fact it is a paleozoogeographic event that occurred in America about 3 million years ago, during an Piliocena epoch. A large American exchange was caused when volcanic activity was created by Ithmus Panama, which connects North and South America, which has been separated from the disintegration of the supercontinent of Pangea for 200 million years. Numerous mammals, part of the lines that were separated for ages, were exchanged between continents, which then became part of the same general biogeographic area, America.
The Mammalian Fauna of North America Prior to Great American Interchange Were in General Boreoeutherian, and Clade Composed of Sister Taxa LaurasiatHeria and Euarchontoglres, What Encompasso (Rats and Mice), Moles, Shrews, Gophers, Ancient Horses, Deer, The now misleading American camel, skunks, bears, saber cats, wolves, foxes, bombs, American lion and nextand. The South American fauna was more unique only for this continent, including Marsupials (with some carnivorous variants), xenartrans (bandillos, anti -todges and sloths, including giant landmarks), Porcuppions, vampire bats, i> i> Low figure with a short suitcase.
In general, if a large American exchange is considered a kind of evolutionary competition, North America won. The North American Fauna, living in a somewhat harder, colder and more climatic continent, had adaptations better for competition than the South American fauna, most of which were strongly adapted to the rainforest and did not do it further than Central America. The exceptions are -known terrorist birds, which reached Texas and Florida, probably consumed millions of small mammals along the road with their huge, sharp razor beaks. Yet he was this oneSuccess short -term because terror birds were extinct into a million years from the journey.
Some examples of animals that have successfully created a large American exchange and have survived to this day belong to Armadillo, found most often in Texas, Virginia Opossum, the only Marsupial found north of Rio Grande, Porcupines, the vapor Pál found in Mexico, Cougar and King's vultura.