From WIRED · Neel Dhanesha · · 1m 20s
California Redwoods Suffer Heat Stress
Coast redwoods slow photosynthesis during extreme heat, risking carbon starvation and ecosystem collapse.
In brief
Coast redwoods slow photosynthesis during extreme heat, risking carbon starvation and ecosystem collapse. Coast redwoods dial down photosynthesis in heatwaves, risking carbon starvation and ecosystem collapse. Originally reported by WIRED.
Redwood Ecosystems
Coast redwood forests create layered ecosystems with soil mats and ferns hundreds of feet above ground.
Unique Tree Life Cycles
Wandering salamanders complete lifecycles on single trees, and marbled murrelets nest 150 feet above ground.
Redwood Heat Vulnerability
Coast redwoods slow photosynthesis during extreme heat, risking carbon starvation and ecosystem collapse.
Tree Physiology
Trees use stomata to take in carbon dioxide and release water; closed stomata conserve water but slow photosynthesis.
UC Davis Study
UC Davis researchers found coast redwoods close stomata during heatwaves, reducing photosynthesis and carbon intake.
Carbon Starvation Risk
Trees lose carbon storage capacity, leading to reduced photosynthesis and potential ecosystem collapse.
Fog Decline Threat
Coast redwoods rely on fog for hydration and cooling, but fog has declined 30 to 40 percent due to warming.
Ecosystem Impact
Soil mats and ferns dry faster, threatening salamanders and seabirds that live high in redwoods.
Short-Term Recovery
Trees recover photosynthesis after heatwaves but face long-term risks with hotter temperatures.
Long-Term Threat
Coast redwoods may not grow as tall or store carbon, risking ecosystem collapse in 5-10 years.
What it means
Coast redwoods dial down photosynthesis in heatwaves, risking carbon starvation and ecosystem collapse.
