New Study Reveals How Climate Change Can Change Hibernation Patterns — Unique long-term research sh |
Near Toolik Field Station in northern Alaska, an arctic ground squirrel pokes its head out of a burrow. Credit: Oivind Toien/University of Alaska FairbanksArctic ground squirrels possess a unique trait among mammals – they can resist freezing even when their body temperatures fall below the freezing point, allowing them to survive harsh winter environments. A recent study published inthat reviews over two decades of climate and biological data reveals some intriguing discoveries.
“I think the thing that makes our study unique is that we are looking at a long enough dataset to show the impacts of climate change on a mammal in the Arctic,” said Williams, who joined the CSU faculty in 2021. “We can show a direct link between changes in temperature and the physiology and ecology of these animals.”
A juvenile arctic ground squirrel foraging near Toolik Field Station in northern Alaska. Credit: Cory Williams/Colorado State University Chmura and Williams, along with co-authors, analyzed long-term air and soil temperature data at two sites in Arctic Alaska in conjunction with data collected using biologgers. They measured abdominal and/or skin temperature of 199 free-living individual ground squirrels over the same 25-year period. They found that females are changing when they end hibernation, emerging earlier every year, but males are not. Changes in females match earlier spring thaw.
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