The American Grey Wolves

The idea of having North America nature restore with large mammals and with species that disappear thousands of years ago, is very interesting and attractive. The arguments of both sides are valid points with ideas that are obtainable and can be achieve with the desire results, if done properly with the current biota of our planet. The current world biota is similar with the biota from the Pleistocene period which lasted from 2.6 million to approximately 11,700 years ago (UCMP). The Biota from these periods was comprised of large mammals such as Mammoths, Mastodons, saber-toothed cats, teratorn birds and many species of flowering plants and birds. This period also marked the end of the advancing of the glaciers and it marked the beginning of

Furthermore, the article mentioned the successful introduction of extinct species from one ecosystem to another like is the case of the American Grey Wolves that went extinct at the beginning of the century and reintroduce using Gray wolves from Canada ("Pleistocene rewilding: An," 2006). This experiment was considered a success, because it brought balance to and unbalance ecosystem from the lack of a top predator. However, when considered that this animal was extinct from the ecosystem for less than a century and considering that the prey was not able to completely adapt to the lack of predators ("Pleistocene rewilding: An," 2006) . In the contrary humans were able to adapt very rapidly to such change in the last century to the point in which the Gray wolves are considered a treat in many areas. They is not doubt the anthropogenic causes are responsible for the vast majority of the extinction of organism in the last 10,000 years (Rubenstein, Rubenstein, Sherman & Gavin, 2006). By reintroducing large mammals to ecosystems from which they has been gone for thousands of years, it can result in the recovery and restoration of many ecosystems such but it can has the opposite effect in the ecosystem which can result in a complete unbalance of the ecosystem (Rubenstein, Rubenstein, Sherman & Gavin,