Temperature-Driven onset and light quality-linked senescence in Fagus sylvatica phenology

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F25%3A00639369" target="_blank" >RIV/86652079:_____/25:00639369 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62156489:43410/25:43927101

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0168192325004538" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0168192325004538</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.agrformet.2025.110834" target="_blank" >10.1016/j.agrformet.2025.110834</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature-Driven onset and light quality-linked senescence in Fagus sylvatica phenology

Popis výsledku v původním jazyce

Understanding phenology is essential to assessing forest responses to climate change, yet most research focuses on leaf development and the onset of the growing season. Less is known about the end-of-season dynamics and their physiological underpinnings. Here, we examined the seasonal timing and coordination of leaf phenology, cambial activity, xylem and phloem formation, sap flow, and gross primary production (GPP) in European beech (Fagus sylvatica L.) from 2018 to 2022 in the Czech Republic. Spring phenology, including budbreak, cambial reactivation, and GPP onset, were driven by air temperatures approaching 10 ◦ C, with a consistent initiation naround DOY 112. In European beech, light appears to function as a regulatory cue, acting as a safeguard against premature budburst, whereas temperature operates as the principal driver of phenological development. Sap flow followed shortly thereafter. In contrast, autumn phenology showed strong sensitivity to solar radiation quality—particularly the clearness index—highlighting the role of spectral light composition in driving senescence. Specifically, 10 % leaf colouring and the onset of phloem compression exhibited peak correlations with late-summer cloudiness (r = 0.97–0.99). Stem growth initiation, measured by dendrometers, lagged two weeks behind xylem enlargement, but the cessation of radial growth (90 %) precisely coincided with the end of secnondary wall thickening. These findings reveal distinct spring and autumn triggers—thermal versus radiative—shaping phenology and underline the need to include ecophysiological indicators in phenology modelling to better represent forest functioning and carbon cycling under climate change.

Název v anglickém jazyce

Temperature-Driven onset and light quality-linked senescence in Fagus sylvatica phenology

Popis výsledku anglicky

Understanding phenology is essential to assessing forest responses to climate change, yet most research focuses on leaf development and the onset of the growing season. Less is known about the end-of-season dynamics and their physiological underpinnings. Here, we examined the seasonal timing and coordination of leaf phenology, cambial activity, xylem and phloem formation, sap flow, and gross primary production (GPP) in European beech (Fagus sylvatica L.) from 2018 to 2022 in the Czech Republic. Spring phenology, including budbreak, cambial reactivation, and GPP onset, were driven by air temperatures approaching 10 ◦ C, with a consistent initiation naround DOY 112. In European beech, light appears to function as a regulatory cue, acting as a safeguard against premature budburst, whereas temperature operates as the principal driver of phenological development. Sap flow followed shortly thereafter. In contrast, autumn phenology showed strong sensitivity to solar radiation quality—particularly the clearness index—highlighting the role of spectral light composition in driving senescence. Specifically, 10 % leaf colouring and the onset of phloem compression exhibited peak correlations with late-summer cloudiness (r = 0.97–0.99). Stem growth initiation, measured by dendrometers, lagged two weeks behind xylem enlargement, but the cessation of radial growth (90 %) precisely coincided with the end of secnondary wall thickening. These findings reveal distinct spring and autumn triggers—thermal versus radiative—shaping phenology and underline the need to include ecophysiological indicators in phenology modelling to better represent forest functioning and carbon cycling under climate change.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40102 - Forestry

Projekt

<a href="/cs/project/LM2023048" target="_blank" >LM2023048: Česká infrastruktura sledování uhlíku</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Agricultural and Forest Meteorology

ISSN

0168-1923

e-ISSN

1873-2240

Svazek periodika

375

Číslo periodika v rámci svazku

Dec.

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

110834

Kód UT WoS článku

001574074600001

EID výsledku v databázi Scopus

2-s2.0-105016013656