The idea that climate change and geological events can shape evolution isn’t a new one: anyone who’s heard of dinosaurs knows that a big change in the environment (like, say, a meteor hitting the Earth 66 million years ago and causing a chain reaction of storms, earthquakes, cold, and darkness) can dictate how animals live, die, and evolve.
The idea that climate change and geological events can shape evolution isn’t a new one: anyone who’s heard of dinosaurs knows that a big change in the environment (like, say, a meteor hitting the Earth 66 million years ago and causing a chain reaction of storms, earthquakes, cold, and darkness) can dictate how animals live, die, and evolve. But while it’s a generally agreed-upon concept, scientists rely on painstakingly precise data to map how these sorts of changes affect the course of evolution for even one species. A new study in PNAS compiles data on more than 3,000 species to show how climate and geologic changes across Asia over the last 66 million years have shaped the evolution of the continent’s mammals.
Asia is the world’s largest continent, and it’s home to just about every type of biome. “Asia has desert up north, tropical forests in the south, temperate forests in the east,” says Anderson Feijó, the study’s lead author, a researcher at the Institute of Zoology, Chinese Academy of Sciences and a former research fellow at Chicago’s Field Museum. “My idea was to understand how all these regions were connected and how we ended up with different species of mammals in different areas.”
“To understand historical events, scientists look for associations with their timing and location– when and where did species appear, and what else was happening then and there? This paper does that for the entire Asian mammal fauna,” says Bruce Patterson, a curator emeritus at the Field Museum and co-author of the paper.
Read more at Field Museum
Image: Left: Lead author Anderson Feijó holding a plateau pika in Tibet. Photo by Danping Mu. Right: Carrying traps in the Hengduan Mountains. Photo by Anderson Feijó.
