Lizard Hurricane Survival Linked to Toe Length Gene
Researchers identified an avian-adjacent genetic marker that enables lizards to maintain their grip during high-speed winds.
Updated on Sept. 24, 2026 in Life Sciences
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Following the 2017 hurricanes that struck the Turks and Caicos, researchers identified that surviving Silver Key anoles possessed distinct limb morphology tied to the hs6st1 gene. This research-stage finding clarifies how extreme weather events can act as a selective pressure on lizard populations.
Why it matters
The study reveals how targeted genomic adaptations enable species to withstand increasingly frequent extreme weather events. By identifying a specific gene that influences clinging capability, researchers are mapping the mechanism of climate-driven natural selection.
Analysis of 221,549 genome-wide single-nucleotide polymorphisms identified the hs6st1 gene as a driver for rear toe length. Laboratory wind trials up to 118 km/h demonstrated that hindlimbs released before forelimbs in 83.7% of cases, with hindlimbs clutching for 11.2 seconds vs 22.7 seconds for forelimbs.
The players
Silver Key anoles
A specific lizard population studied for morphological changes following hurricane events.
Brown anoles
A common species of lizard utilized as the primary model for genetic disruption and wind tunnel testing.
The details
Researchers used CRISPR-Cas9—a precise gene-editing tool that uses a guide RNA to direct enzymes to specific DNA sequences—to disrupt the hs6st1 gene in brown anole embryos. The resulting lizards exhibited shorter rear toe elements, which reduced wind resistance during simulated storm conditions. By placing the lizards on a vertical wooden dowel in a wind system, the study measured how these physical traits allowed for more effective grip duration.
Timeline
September 2017: Hurricanes Irma and Maria struck the Turks and Caicos.
2018: Researchers collected tissue samples from the local lizard populations.
The Tech Race
This study follows a pattern set by the ongoing research into rapid evolution in hurricane-prone island ecosystems. It advances the field by isolating the genetic mechanism behind previously observed morphological adaptations.
These findings characterize the biological impact of extreme weather events on island ecosystems rather than offering consumer-facing technology. The data provides a clearer understanding of how environmental hazards influence the evolutionary trajectory of native species.
The takeaway
The research confirms that short-term environmental stress can rapidly alter the genetic expression of a population. Future studies will likely investigate if this gene variant provides fitness advantages in non-hurricane conditions.
Further reading
For broader context on how environmental pressures influence biodiversity, explore the Life Sciences archives.
Source note: This article includes information reported by The Times of India.
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