Tibet-an evolutionary nursery for psychrophilic mammals - FFT Ecology News

Tibet-an evolutionary nursery for psychrophilic mammals

The Royal Society B: Researchers in the Biological Science Proceedings said that Tibet may have become a “testing ground” for the evolution of species living in polar regions for future generations.

In the past 2.5 million years, the earth has experienced an icy period of about 1,000 years, the ice age. During cool times, powerful glaciers cover all continents in the northern hemisphere. With warming, glaciers receded, carving valleys and other powerful geological forms. This alternate development and glacier retreat not only carved the area, but also affected the evolution and geographic distribution of many animals-including those still living in the Arctic today.
According to the authors of the publication, scientists from the Natural History Museum of Los Angeles County, if animals are not considered, it is impossible to fully understand the evolution of the inhabitants of the Arctic and other polar regions today. They learned to live in the cold climate of the Qinghai-Tibet Plateau.
The scientists came to their conclusions, including after studying the remains of a previously unknown Tibetan fox (Vulpes qiuzhudingi) living in the Himalayas 3-5 million years ago. These fossil specimens were discovered in southern Tibet in 2010. According to researchers, this animal may be the ancestor of the modern fox arctic fox (Vulpes lagopus).
In addition to the ancestors of this song, scientists have also discovered extinct woolly rhinos, three-toed horses, nachuras (or Balaroos or sheep that once lived in the Himalayas), chiras (also called Tibetan antelopes), irbis (also Known as the snow leopard), rs and 23 other mammals.
Until now, people have been searching for the roots of large fauna that like the Pleistocene in the Arctic tundra or cold grasslands in various parts of the world. However, new fossil research offers scientists another option. They call it the “exit Tibet” hypothesis.
For certain members of the ice age large fauna (including mammoths and saber-toothed tigers), they regarded ancient Tibet as a “training ground.” This is where adaptation emerges so that they can later survive the difficult climate in other parts of the world.
Therefore, the Tibetan ancestors of polar species have been trained and lived in the Ice Age between 26,000 and 2.01 million years ago.
Tibet-as the lead author of Wang Xiaoming of the Los Angeles County Museum of Natural History pointed out-for paleontologists, Tibet is a fertile region, despite the great challenges of working here. Including it is difficult for him to breathe because he is more than 4,000 in height, and the water in the research camp freezes to the bones every night. (PAP)