Study: Oaks absorb CO2 long after growth stops
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A study published in ScienceDaily reveals that oak trees continue absorbing carbon dioxide long after their annual growth has ended. The finding challenges the long-held assumption that photosynthesis and wood production are tightly linked.
The Discovery
Researchers found that oak trees absorb carbon dioxide even after their annual growth rings have stopped forming. The study tracked carbon uptake in mature oaks over several years, measuring both photosynthesis and wood production. Results showed significant CO2 absorption during periods when no new wood was being added.
Implications for Carbon Models
The finding suggests that current carbon cycle models may underestimate forests' capacity to store carbon. Many models assume that carbon uptake stops when growth ceases. If oaks and other species behave similarly, global forest carbon sink estimates could be revised upward by 10-20%.
What's Next
Researchers plan to expand the study to other tree species and regions. It remains unclear how long the post-growth carbon absorption continues and whether it persists under warmer conditions.
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Study: Oaks absorb CO2 long after growth stops
