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Redwoods Face Heat Stress as Climate Change Intensifies
Confirmed
In Short: A new study published in Science News reveals that redwood trees, known for their resilience, face significant threats from extreme heat due to climate change.
A new study published in Science News reveals that redwood trees, known for their resilience, face significant threats from extreme heat due to climate change.
The study highlights that redwood needles can reach up to 10 degrees Celsius hotter than the surrounding air due to the dark needles absorbing ample sunlight.
Lead researcher, quoted in Science News, noted, “We still don’t know what the threshold is for irreversible damage.”
The study also suggests that simultaneous heat waves and droughts could exacerbate the slowdown in photosynthesis, potentially leading to more severe impacts on the trees.
Redwoods are crucial carbon sinks, storing vast amounts of carbon that help mitigate climate change. Their vulnerability could jeopardize one of California’s largest carbon stores.
The findings raise concerns about the long-term survival of redwoods and the potential loss of their carbon sequestration capabilities, which could accelerate climate change.
While redwoods are known for withstanding fire, fungus, and rot, the new research indicates that extreme heat could be their Achilles heel.
The research team used lab experiments to simulate real-world conditions, showing the critical impact of rising temperatures on redwood health.
As climate change continues to intensify, the fate of these iconic trees hangs in the balance, highlighting the broader challenges facing ecosystems worldwide.
What this adds
While the research focuses on redwoods, similar impacts could be observed in other tree species facing extreme heat conditions.
What's confirmed
- An antelope native to southern Africa’s Kalahari Desert has found a foothold in New Mexico’s dry rangelands, and climate change could give it far more of the American West to roam.
What's still developing
- A new study found the tree's needles can cut their net photosynthesis roughly in half when temperatures spike.
- Lab experiments show the rate of the sunlight-driven food making process in its needles roughly halves when temperatures rise from 30° to 40° Celsius.
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