Climate and atmospheric deposition effects on forest water-use efficiency and nitrogen availability across Britain
Guerrieri, Rossella (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Vanguelova, Elena (Alice Holt Lodge. Forest Research)
Pitman, Rona (Forest Alice Holt Lodge. Research)
Benham, Sue (Alice Holt Lodge. Forest Research)
Perks, Michael (Northern Research Station. Forest Research)
Morison, James I. L. (Alice Holt Lodge. Forest Research)
Mencuccini, Maurizio (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2020
Resum:	Rising atmospheric CO (c) has been shown to increase forest carbon uptake. Yet, whether the c-fertilization effect on forests is modulated by changes in sulphur (S) and nitrogen (N) deposition and how N affects ecosystem N availability remains unclear. We explored spatial and temporal (over 30-years) changes in tree-ring δ 13 C-derived intrinsic water-use efficiency (iWUE), δ 18 O and δ 15 N 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 also an age effect (Sitka spruce). Most species showed no significant trends for tree-ring δ 15 N, suggesting no changes in N availability. Increase in iWUE was mostly associated with increase in temperature and decrease in moisture conditions across the South-North gradient and over 30-years. However, when excluding Sitka spruce (to account for age or stand development effects), variations in iWUE were significantly associated with changes in c and S. Our data suggest that overall climate had the prevailing effect on changes in iWUE across the investigated sites. Whereas, detection of N, S and c signals was partially confounded by structural changes during stand development.
Ajuts:	European Commission 705432
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Carbon cycle ; Atmospheric chemistry ; Ecophysiology ; Stable isotope analysis ; Environmental monitoring
Publicat a:	Scientific reports, Vol. 10 (July 2020) , art. 12418, ISSN 2045-2322

DOI: 10.1038/s41598-020-67562-w
PMID: 32709879

16 p, 2.2 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
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