California’s Tallest and Most Iconic Trees Are Getting Heatstroke
Redwoods adapted to a cool, foggy climate. Now a new study shows they slow down photosynthesis when their environment warms.
California's tallest and most iconic redwood trees are experiencing heat stress, according to a new study by researchers at the University of California, Davis. These majestic trees, which can reach heights of over 300 feet, are home to many unique species, including the wandering salamander and marbled murrelet. The study found that during periods of extreme heat, the redwood leaves essentially "dial down" their photosynthesis, slowing their "breathing" and "eating" as they struggle to cool down quickly enough.
This phenomenon, known as carbon starvation, could have severe consequences for the future of these iconic trees and the species that depend on them. Redwoods have a particularly weak spot when it comes to heat stress, as their leaves heat up quickly and cannot cool down as effectively as other plants. As climate change continues to drive global temperatures up, this problem is expected to worsen, creating a vicious cycle of declining tree health and reduced carbon sequestration.
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