Why do coastal redwood trees depend on fog?
A It cools the forest floor
B It provides moisture they absorb
C It blocks excessive sunlight
Fact: Coastal redwoods rely on fog for moisture, especially during dry summers. Their needles absorb water directly from the air through a process called foliar uptake. Fog condenses on the trees, forming droplets that drip to the roots, replenishing groundwater. This provides up to 40% of their annual water intake. The thick canopy helps trap fog, maintaining humidity and reducing water loss. Without fog, redwoods would struggle to survive in California’s summer droughts.
Correct Answer: It provides moisture they absorb