Studies Shed Light on Why Species Stay or Go in Response to Climate Change
Two new studies by scientists at UC Berkeley provide a clearer picture of why some species move in response to climate change, and where they go.
The Ash-throated Flycatcher, a low-elevation species, shifted its range downslope in response to climate change, researchers found. (Morgan Tingley photo)
One study, published online Monday, Aug. 6, in the journal Global Change Biology, finds that changes in precipitation have been underappreciated as a factor in driving bird species out of their normal range. In the other study, published today (Wednesday, Aug. 15) in the journal Proceedings of the Royal Society B, researchers found a sharp decrease in range for the Belding’s ground squirrel, but noted some surprising areas where the species found refuge.
The two studies exemplify the type of research being explored through the Berkeley Initiative in Global Change Biology, or BiGCB, an ambitious effort to better understand and predict how plants and animals will respond to changing environmental conditions by studying how they have responded to earlier periods of climate change.
The first study’s findings challenge the conventional reliance on temperature as the only climate-related force impacting where species live. The authors noted that as many as 25 percent of species have shifted in directions that were not predicted in response to temperature changes, yet few attempts have been made to investigate this.