Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 18
Articles | Volume 23, issue 18
https://doi.org/10.5194/bg-23-6491-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-6491-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 18
Research article
 | 
17 Sep 2026
Research article |  | 17 Sep 2026

How beech ecophysiology shapes temperate forest gross primary productivity – Part 2: Identifying critical timeframes across phenological stages

Jonathan Bitton, Bernard Heinesch, Catherine Charles, and Bernard Longdoz

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Short summary
We studied 24 years of carbon exchange in a beech forest to understand why its productivity rises, peaks and declines each at different times of the year. We mapped climate effects onto short biological windows and found that stored carbon supports early growth, a one‑week bud formation period can set next year’s peak and bursts of dry air drive mid‑summer drops. Hot summers even raised productivity when water was available. These insights help anticipate forest responses to heat and drought.
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