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Date Time Climate Change Likely Drove Extinction of North America’s Largest Animals New research suggests that overhunting by humans was not responsible for the extinction of mammoths, ground sloths, and other North American megafauna. A new study published in Nature Communications suggests that the extinction of North America’s largest mammals was not driven by overhunting by rapidly expanding human populations following their entrance into the Americas. Instead, the findings, based on a new statistical modelling approach, suggest that populations of large mammals fluctuated in response to climate change, with drastic decreases of temperatures around 13,000 years ago initiating the decline and extinction of these massive creatures. Still, humans may have been involved in more complex and indirect ways than simple models of overhunting suggest. ....
E-Mail IMAGE: The study s findings suggest that decreasing hemispheric temperatures and associated ecological changes were the primary drivers of the Late Quaternary megafauna extinctions in North America. view more Credit: Hans Sell A new study published in Nature Communications suggests that the extinction of North America s largest mammals was not driven by overhunting by rapidly expanding human populations following their entrance into the Americas. Instead, the findings, based on a new statistical modelling approach, suggest that populations of large mammals fluctuated in response to climate change, with drastic decreases of temperatures around 13,000 years ago initiating the decline and extinction of these massive creatures. Still, humans may have been involved in more complex and indirect ways than simple models of overhunting suggest. ....
Horsetalk.co.nz North American extinctions, including horses, were likely climate driven, say researchers Share The Max Planck Extreme Events Research Group, from left, W. Christopher Carleton, Mathew Stewart, Huw Groucutt and Angela Kiesewetter. Photo: MPI-CE Overhunting by humans was not responsible for the extinction of horses, mammoths, ground sloths, and other North American megafauna, the findings of fresh research suggest. Scientists say the latest evidence supports the view that climate change was behind the loss of some 37 species of megafauna a little over 10,000 years ago, near the end of the Pleistocene epoch. Their findings, reported in the journal Nature Communications, do not support a hypothesis, first discussed as far back as the late 18th century, that the extinctions arose by overhunting by expanding human populations following their entrance into the Americas. ....