Giant sequoias have survived for thousands of years in California's western Sierra Nevada mountain range.SEQUOIA NATIONAL PARK, Calif. --
Giant sequoias, the Earth's largest living things, have survived for thousands of years in California's western Sierra Nevada mountain range, the only place where the species is native. "The most significant threat to giant sequoias is climate-driven wildfires," said Ben Blom, director of stewardship and restoration at Save the Redwoods League. "But we certainly don't want to be caught by surprise by a new threat, which is why we're studying these beetles now."
"We're documenting some trees that are actually dying from kind of a combination of drought and fire that have weakened them to a point where they're not able to defend themselves from the beetle attack," Ambrose said. But it's not possible to climb every sequoia tree to directly inspect the canopy in person. That's why they're also testing whether drones equipped with sensors and aided by satellite imagery can be used to monitor and detect beetle infestations on a larger scale within the forests.
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