First Proof That Wild Species Can Evolve Fast Enough to Survive Climate Change

A Wildflower's Fight for Survival

A small wildflower clinging to streambeds along the American West Coast has just rewritten the textbook on evolution and climate change. The scarlet monkeyflower has become the first documented case of a natural species evolving fast enough to survive an extreme climate event, according to research published in the journal Science on the twelfth of March twenty twenty-six.

Eight Years of Tracking Through a Historic Drought

Researchers spent eight years tracking nineteen populations of the scarlet monkeyflower across Oregon, California, and Mexico. That window happened to include what scientists have called the most extreme drought in more than ten thousand years in California, lasting from twenty twelve to twenty sixteen. Using whole-genome sequencing across fifty-five populations, the team identified genetic markers associated with climate adaptation and tracked how those markers shifted during the drought.

Winners and Losers

The results were stark. Some populations suffered declines of up to ninety percent. But the populations that recovered were the ones that evolved the fastest, shifting toward genetic variants favouring hot, dry conditions. The genetic adaptations appear linked to variations in stomata, the tiny pores on leaves that control water loss and carbon absorption during photosynthesis. Populations that began with the most genetic variation at climate-associated sites fared best, while those lacking that variation declined or disappeared entirely.

Hope With Important Caveats

The findings carry both optimism and caution. While some current projection models may be overestimating species decline by not accounting for rapid evolutionary change, evolutionary rescue is far from guaranteed. It appears most promising for abundant, short-lived species with high genetic diversity. For longer-lived species or those with limited genetic variation, the outlook remains uncertain. As lead author Daniel Anstett of Cornell University put it, evolution has no foresight; it is a process the same way gravity is a process.