Rare Mouse Species Adapts to Climate Change

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Researchers have published a new study in Science Advances on the Pacific pocket mouse, North America's most endangered mouse species. The study analyzes the genomes of these mice collected over the past century and identifies 14 genes associated with adaptation to temperature and moisture. The researchers then tracked these genes in a population reintroduced to the wild from a conservation breeding program, finding that the genetic variation in these climate-associated genes shifted as predicted for the new environment, suggesting that adaptation to changing climates is ongoing.

Why it matters

This research provides important insights into how endangered species can adapt to climate change, which poses a major threat to many species with limited genetic diversity. Understanding the genetic mechanisms behind climate adaptation can help inform conservation efforts to support vulnerable populations as environments continue to shift.

The details

The Pacific pocket mouse was once thought to be extinct before being rediscovered in 1994. Researchers analyzed the genomes of these mice collected over the past century and identified 14 genes associated with adaptation to temperature and moisture. They then tracked these genes in a population reintroduced to the wild from a conservation breeding program, finding that the genetic variation in these climate-associated genes shifted as predicted for the new environment.

• The study will be published this week in the journal Science Advances.
• The embargo on the study will lift at 2:00 pm U.S. Eastern Time on Friday, April 17, 2026.

What’s next

The research provides a framework for how conservation programs can support endangered species as climates continue to change, and the findings could inform future efforts to protect the Pacific pocket mouse and other vulnerable species.