Key Largo Tree Cactus Extinct in U.S. Due to Rising Sea Levels

The cactus is the first species in the U.S. to be eradicated by climate change-driven sea level rise, highlighting a broader biodiversity crisis.

The Key Largo tree cactus was discovered in 1992 and had a population of about 150 stems in the Florida Keys.
Rising sea levels, intensified storms, and saltwater intrusion led to the cactus's demise.
The last six stems were salvaged in 2021 for cultivation to prevent total extinction.
Researchers warn this extinction signals potential future losses for other coastal plants.
Conservation efforts are underway to replant the cactus in controlled environments.