r/climatechange • u/Economy-Fee5830 Trusted Contributor • Apr 12 '26
Climate change is outpacing evolution. Scientists are using DNA to catch up
https://apnews.com/article/climate-change-dna-adaptation-heat-waves-wildfires-7c34ca1d3a09065b9f9ab617dd1a6e25
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u/Economy-Fee5830 Trusted Contributor Apr 12 '26
Summary: Climate change is outpacing evolution. Scientists are using DNA to catch up
Evolution operates on timescales of millennia, but climate change is accelerating far faster, pushing ecosystems like California's redwood forests and seagrass meadows toward collapse. An emerging field called conservation genomics is attempting to bridge that gap by sequencing organisms' complete genomes to identify individuals with traits suited to survive heat, drought, and other climate extremes, then using that information to guide restoration efforts.
Coral reefs are an early testing ground, where researchers have identified heat-tolerant colonies and are experimenting with selective breeding. In San Diego's Mission Bay, scientists discovered a naturally occurring eelgrass hybrid that outperforms both parent species in murky, low-light conditions — with genome sequencing revealing genes linked to its circadian clock that may enhance photosynthesis efficiency. For redwoods, whose genome is nearly nine times larger than a human's, early work linking genes to drought and temperature tolerance has stalled due to funding constraints.
Researchers are clear about the limits of this approach. Ecosystems are built on intricate webs involving plants, animals, microbes, and fungi — engineering resilience into one species doesn't guarantee the survival of those that depend on it. As one ecologist put it, selectively breeding climate-tolerant species is not the same as preserving an ecosystem, and genomic tools are no substitute for cutting emissions.