Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient

1. Climate warming increases vulnerability to drought in Mediterranean water-limited forests. However, we still lack knowledge of the long-term physiological responses of coexisting pine species in these forests regarding their ability to cope with warming-induced drought stress. 2. We investigated...

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Autores: Shestakova, Tatiana A., Camarero Martínez, Jesús Julio, Ferrio Díaz, Juan Pedro, Knorre, Anastasia A., Gutiérrez, Emilia, Voltas Velasco, Jordi
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Recursos:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/60558
Acesso em linha:https://doi.org/10.1111/1365-2435.12857
http://hdl.handle.net/10459.1/60558
Access Level:acceso abierto
Palavra-chave:Carbon isotopes
Climate warming
Dendroecology
Mixed modelling
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spelling Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradientShestakova, Tatiana A.Camarero Martínez, Jesús JulioFerrio Díaz, Juan PedroKnorre, Anastasia A.Gutiérrez, EmiliaVoltas Velasco, JordiCarbon isotopesClimate warmingDendroecologyMixed modelling1. Climate warming increases vulnerability to drought in Mediterranean water-limited forests. However, we still lack knowledge of the long-term physiological responses of coexisting pine species in these forests regarding their ability to cope with warming-induced drought stress. 2. We investigated spatiotemporal patterns of tree performance for five isohydric pines with partially overlapping ecological niches in the eastern Iberian Peninsula along an altitudinal gradient: Pinus halepensis = Pinus pinaster ≤ Pinus nigra ≤ Pinus sylvestris ≤ Pinus uncinata. 3. Using indexed tree-ring widths (TRWi), we assessed the changes in the temporal coherence of radial growth (growth synchrony, âC) over the period 1902-2011 across three elevation belts: low ≈1100 m; mid = 1615 m; high = 2020 m. We also examined by mixed modelling whether TRWi showed an increased coupling with leaf-level gas exchange (inferred from indexed carbon isotope discrimination, Δ13Ci) by enhanced stomatal regulation in response to an amplified regional drought stress. 4. Increasingly negative annual water balances (decrease in annual precipitation minus evapotranspiration = −4·8 mm year−1; 1970-2011) prompted more synchronous growth of coexisting pines between low- and mid-elevation belts, with âC rising from 0·25 ± 0·04 (1902-1951) to 0·62 ± 0·05 (1962-2011). This effect was coupled with tighter stomatal regulation at mid-elevation as indicated by high correlations between TRWi and Δ13Ci (>0·60 from the mid-1970s onwards) which resembled those found at low elevation. Simultaneously, TRWi vs. Δ13Ci uncoupling occurred at the high-elevation belt across species. 5.Weaker growth-climate relationships as elevation increased highlighted the major role of the altitude-dependent thermal gradient in growth responsiveness to drought; however, an intensified Δ13Ci response to spring water availability across elevation belts observed from mid-1970s onwards suggested regional shifts in tree physiological activity linked to earlier seasonal drought impacts. Warming-induced drought stress is spreading to higher altitudes in Iberian pinewoods as multispecies growth is linked to progressively tighter stomatal control of water losses reflected in wood Δ13C.T.A.S. and J.P.F acknowledge ERANET-Mundus (European Commission, Grant agreement 20112573) and the Ramón y Cajal program (RYC-2008-02050) respectively. A.A.K. benefitted from a visiting grant (University of Lleida). This study was supported by projects AGL2015-68274-C3-3-R (MINECO/FEDER) and 2014 SGR1141 (Catalan Government). We acknowledge P. Sopeña and M.J. Pau for technical assistance and G. Sangüesa-Barreda for field sampling.British Ecological Society2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.1111/1365-2435.12857http://hdl.handle.net/10459.1/60558reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/MINECO//AGL2015-68274-C3-3-RVersió postprint del document publicat a: https://doi.org/10.1111/1365-2435.12857Functional Ecology, 2017, vol. 31, núm. 7, p. 1359-1370(c) British Ecological Society, 2017(c) Shestakova et al., 2017info:eu-repo/semantics/openAccessoai:repositori.udl.cat:10459.1/605582026-06-24T12:42:17Z
dc.title.none.fl_str_mv Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient
title Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient
spellingShingle Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient
Shestakova, Tatiana A.
Carbon isotopes
Climate warming
Dendroecology
Mixed modelling
title_short Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient
title_full Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient
title_fullStr Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient
title_full_unstemmed Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient
title_sort Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient
dc.creator.none.fl_str_mv Shestakova, Tatiana A.
Camarero Martínez, Jesús Julio
Ferrio Díaz, Juan Pedro
Knorre, Anastasia A.
Gutiérrez, Emilia
Voltas Velasco, Jordi
author Shestakova, Tatiana A.
author_facet Shestakova, Tatiana A.
Camarero Martínez, Jesús Julio
Ferrio Díaz, Juan Pedro
Knorre, Anastasia A.
Gutiérrez, Emilia
Voltas Velasco, Jordi
author_role author
author2 Camarero Martínez, Jesús Julio
Ferrio Díaz, Juan Pedro
Knorre, Anastasia A.
Gutiérrez, Emilia
Voltas Velasco, Jordi
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Carbon isotopes
Climate warming
Dendroecology
Mixed modelling
topic Carbon isotopes
Climate warming
Dendroecology
Mixed modelling
description 1. Climate warming increases vulnerability to drought in Mediterranean water-limited forests. However, we still lack knowledge of the long-term physiological responses of coexisting pine species in these forests regarding their ability to cope with warming-induced drought stress. 2. We investigated spatiotemporal patterns of tree performance for five isohydric pines with partially overlapping ecological niches in the eastern Iberian Peninsula along an altitudinal gradient: Pinus halepensis = Pinus pinaster ≤ Pinus nigra ≤ Pinus sylvestris ≤ Pinus uncinata. 3. Using indexed tree-ring widths (TRWi), we assessed the changes in the temporal coherence of radial growth (growth synchrony, âC) over the period 1902-2011 across three elevation belts: low ≈1100 m; mid = 1615 m; high = 2020 m. We also examined by mixed modelling whether TRWi showed an increased coupling with leaf-level gas exchange (inferred from indexed carbon isotope discrimination, Δ13Ci) by enhanced stomatal regulation in response to an amplified regional drought stress. 4. Increasingly negative annual water balances (decrease in annual precipitation minus evapotranspiration = −4·8 mm year−1; 1970-2011) prompted more synchronous growth of coexisting pines between low- and mid-elevation belts, with âC rising from 0·25 ± 0·04 (1902-1951) to 0·62 ± 0·05 (1962-2011). This effect was coupled with tighter stomatal regulation at mid-elevation as indicated by high correlations between TRWi and Δ13Ci (>0·60 from the mid-1970s onwards) which resembled those found at low elevation. Simultaneously, TRWi vs. Δ13Ci uncoupling occurred at the high-elevation belt across species. 5.Weaker growth-climate relationships as elevation increased highlighted the major role of the altitude-dependent thermal gradient in growth responsiveness to drought; however, an intensified Δ13Ci response to spring water availability across elevation belts observed from mid-1970s onwards suggested regional shifts in tree physiological activity linked to earlier seasonal drought impacts. Warming-induced drought stress is spreading to higher altitudes in Iberian pinewoods as multispecies growth is linked to progressively tighter stomatal control of water losses reflected in wood Δ13C.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1111/1365-2435.12857
http://hdl.handle.net/10459.1/60558
url https://doi.org/10.1111/1365-2435.12857
http://hdl.handle.net/10459.1/60558
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO//AGL2015-68274-C3-3-R
Versió postprint del document publicat a: https://doi.org/10.1111/1365-2435.12857
Functional Ecology, 2017, vol. 31, núm. 7, p. 1359-1370
dc.rights.none.fl_str_mv (c) British Ecological Society, 2017
(c) Shestakova et al., 2017
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) British Ecological Society, 2017
(c) Shestakova et al., 2017
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv British Ecological Society
publisher.none.fl_str_mv British Ecological Society
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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