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

Autor:	Mike Perks, James I. L. Morison, Elena Vanguelova, Maurizio Mencuccini, Rossella Guerrieri, Rona Pitman, Sue Benham
Přispěvatelé:	Guerrieri, Rossella, Vanguelova, Elena, Pitman, Rona, Benham, Sue, Perks, Michael, Morison, James I. L., Mencuccini, Maurizio
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	0301 basic medicine Stand development Ecophysiology Atmospheric chemistry Stable isotope analysis 010504 meteorology & atmospheric sciences δ18O Atmospheric chemistry stable isotopes water-use efficiency tree rings ecophysiology environmental monitoring lcsh:Medicine Atmospheric sciences 01 natural sciences Article 03 medical and health sciences Ecosystem Water-use efficiency lcsh:Science 0105 earth and related environmental sciences Multidisciplinary biology lcsh:R Scots pine Environmental monitoring δ15N Carbon cycle 15. Life on land biology.organism_classification 030104 developmental biology Deposition (aerosol physics) Environmental science lcsh:Q
Zdroj:	Scientific Reports, Vol 10, Iss 1, Pp 1-16 (2020) Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona Scientific Reports
ISSN:	2045-2322
DOI:	10.1038/s41598-020-67562-w
Popis:	Rising atmospheric CO2 (ca) has been shown to increase forest carbon uptake. Yet, whether the ca-fertilization effect on forests is modulated by changes in sulphur (Sdep) and nitrogen (Ndep) deposition and how Ndep 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 also an age effect (Sitka spruce). Most species showed no significant trends for tree-ring δ15N, 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 ca and Sdep. Our data suggest that overall climate had the prevailing effect on changes in iWUE across the investigated sites. Whereas, detection of Ndep, Sdep and ca signals was partially confounded by structural changes during stand development.
Databáze:	OpenAIRE
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