Molecular hope: tiny ocean creatures reveal dual paths to climate resilience
Peer-Reviewed Publication
Updates every hour. Last Updated: 15-Oct-2025 10:11 ET (15-Oct-2025 14:11 GMT/UTC)
A first-of-its-kind experiment tracing evolution across 25 generations shows that tiny crustaceans at the heart of the ocean food web rely on a largely unknown biological toolkit to survive the stresses of climate change. The study reveals that it’s not only genetic changes that help these animals adapt to warming and acidifying ocean conditions. In addition, little-known epigenetic changes play a crucial role too. Remarkably, the researchers led by Melissa Pespeni at the University of Vermont discovered that the two mechanisms operate independently offering a two-pronged strategy for resilience. Until now, few studies have tracked genetic and epigenetic changes in tandem over many generations. This experiment is one of the first to do so in a long-term, replicated evolution study—offering some of the strongest evidence yet that epigenetic change can help populations survive and perhaps allow future genetic adaptation. Which means that copepods may be tougher under the stresses of a warming ocean than scientists previously would have predicted. And that could be good news for the fish species who eat copepods as primary prey—and many other creatures.
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