2024-03-28T17:54:31Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1982582020-01-18T02:08:24Zcom_10261_77com_10261_8col_10261_330
DIGITAL.CSIC
author
Forner, Alicia
author
Valladares Ros, Fernando
author
Bonal, Damien
author
Granier, André
author
Grossiord, Charlotte
author
Aranda, Ismael
funder
Ministerio de Economía y Competitividad (España)
funder
Comunidad de Madrid
funder
Agence Nationale de la Recherche (France)
2020-01-17T14:07:07Z
2020-01-17T14:07:07Z
2018-08
Tree Physiology 38(8): 1127-1137 (2018)
0829-318X
http://hdl.handle.net/10261/198258
10.1093/treephys/tpy022
1758-4469
http://dx.doi.org/10.13039/501100001665http://dx.doi.org/10.13039/100012818http://dx.doi.org/10.13039/501100003329
It has been known for a long time that drought intensity is a critical variable in determining water stress of Mediterranean tree species. However, not as much attention has been paid to other drought characteristics, for example the timing of the dry periods. We investigated the impact of the timing and intensity of extreme droughts on growing season length, growth and water-use efficiency of three tree species, Pinus nigra ssp. Salzmannii J.F. Arnold, Quercus ilex ssp. ballota (Desf.) Samp. and Quercus faginea Lam. coexisting in a continental Mediterranean ecosystem. Over the study period (2009-13), intense droughts were observed at annual and seasonal scales, particularly during 2011 and 2012. In 2012, an atypically dry winter and spring was followed by an intense summer drought. Quercus faginea growth was affected more by drought timing than by drought intensity, probably because of its winter-deciduous leaf habit. Pinus nigra showed a lower decrease in secondary growth than observed in the two Quercus species in extremely dry years. Resilience to extreme droughts was different among species, with Q. faginea showing poorer recovery of growth after very dry years. The highest intra- and inter-annual plasticity in water-use efficiency was observed in P. nigra, which maintained a more water-saving strategy. Our results revealed that the timing of extreme drought events can affect tree function to a larger extent than drought intensity, especially in deciduous species. Legacy effects of drought over months and years significantly strengthened the impact of drought timing and intensity on tree function.
closedAccess
Carbon isotope composition
Extreme drought
Pinus nigra
Quercus faginea
Quercus ilex
Water-use efficiency
Extreme droughts affecting Mediterranean tree species' growth and water-use efficiency: the importance of timing
artículo
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URL
https://digital.csic.es/bitstream/10261/198258/1/accesoRestringido.pdf
File
MD5
42637ae8545636bc41605c1740a9a84e
15753
application/pdf
accesoRestringido.pdf