Dynamic Shifts in Radial Sap Flow of Two Temperate Tree Species in Response to the Dry Summer 2022 DOI Creative Commons
Stefanie Dumberger, Laura Kinzinger, Markus Weiler

и другие.

Ecohydrology, Год журнала: 2025, Номер 18(4)

Опубликована: Июнь 1, 2025

ABSTRACT Species‐specific regulation of water fluxes and storage in the xylem are important drivers drought tolerance. However, differences may occur along radial profile xylem, potentially modifying responses. We investigated sap flow ( J s ) stem content (WC at two depths, diurnal radius variations Quercus petraea Abies alba a mature forest stand SW‐Germany during 2 years contrasting environmental conditions. In response to drought, Q. maintained high , albeit with dynamic shift between inner outer vessels: Under vapour pressure deficit (VPD), exceeded day, despite its ring‐porous anatomy. From dusk dawn low VPD, this pattern was reversed higher compared xylem. Since WC reached plateau concurrently shift, tree deficits could be refilled most nights reduction likely prevented excessive depletion reserves. contrast, A. strictly decreased by up 80% dry wet year, more pronounced reductions summary, our study demonstrated that different depths link reserves might an understudied trait temperate trees should incorporated into future studies.

Язык: Английский

Dynamic Shifts in Radial Sap Flow of Two Temperate Tree Species in Response to the Dry Summer 2022 DOI Creative Commons
Stefanie Dumberger, Laura Kinzinger, Markus Weiler

и другие.

Ecohydrology, Год журнала: 2025, Номер 18(4)

Опубликована: Июнь 1, 2025

ABSTRACT Species‐specific regulation of water fluxes and storage in the xylem are important drivers drought tolerance. However, differences may occur along radial profile xylem, potentially modifying responses. We investigated sap flow ( J s ) stem content (WC at two depths, diurnal radius variations Quercus petraea Abies alba a mature forest stand SW‐Germany during 2 years contrasting environmental conditions. In response to drought, Q. maintained high , albeit with dynamic shift between inner outer vessels: Under vapour pressure deficit (VPD), exceeded day, despite its ring‐porous anatomy. From dusk dawn low VPD, this pattern was reversed higher compared xylem. Since WC reached plateau concurrently shift, tree deficits could be refilled most nights reduction likely prevented excessive depletion reserves. contrast, A. strictly decreased by up 80% dry wet year, more pronounced reductions summary, our study demonstrated that different depths link reserves might an understudied trait temperate trees should incorporated into future studies.

Язык: Английский

Процитировано

0