Climate and atmospheric deposition effects on forest water-use efficiency and nitrogen availability across Britain.

ABSTRACT: Rising atmospheric CO₂ (c_a) has been shown to increase forest carbon uptake. Yet, whether the c_a-fertilization effect on forests is modulated by changes in sulphur (S_dep) and nitrogen (N_dep) deposition and how N_dep affects ecosystem N availability remains unclear. We explored spatial and temporal (over 30-years) changes in tree-ring δ¹³C-derived intrinsic water-use efficiency (iWUE), δ¹⁸O and δ¹⁵N for four species in twelve forests across climate and atmospheric deposition gradients in Britain. The increase in iWUE was not uniform across sites and species-specific underlying physiological mechanisms reflected the interactions between climate and atmospheric drivers (oak and Scots pine), but a

SUBMITTER: Guerrieri R 

PROVIDER: S-EPMC7381603 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature