Drought impacts on tree carbon sequestration and water use - evidence from intra-annual tree-ring characteristics.

ABSTRACT: The impact of climate extremes on forest ecosystems is poorly understood but important for predicting carbon and water cycle feedbacks to climate. Some knowledge gaps still remain regarding how drought-related adjustments in intra-annual tree-ring characteristics directly impact tree carbon and water use. In this study we quantified the impact of an extreme summer drought on the water-use efficiency and carbon sequestration of four mature Norway spruce trees. We used detailed observations of wood formation (xylogenesis) and intra-annual tree-ring properties (quantitative wood anatomy and stable carbon isotopes) combined with physiological water-stress monitoring. During 41 d of tree water deficit, we observed an enrichment in ¹³ C but a reduction in cell enlargement and wall-thi

SUBMITTER: Martinez-Sancho E 

PROVIDER: S-EPMC9542003 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature