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dc.contributor.author
Gyenge, Javier Enrique
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dc.contributor.author
Fernandez, Maria Elena
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dc.contributor.author
Varela, Santiago Agustín
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dc.date.available
2023-04-19T18:41:28Z
dc.date.issued
2012-08
dc.identifier.citation
Gyenge, Javier Enrique; Fernandez, Maria Elena; Varela, Santiago Agustín; Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America; Springer; Trees; 26; 6; 8-2012; 1905-1917
dc.identifier.issn
0931-1890
dc.identifier.uri
http://hdl.handle.net/11336/194610
dc.description.abstract
Trees drought responses could be developed in the short- or in the long-term, aiming at sustaining carbon fixation and water use efficiency (WUE). The objective of this study was to examine short- and long-term adjustments occurring in different size Pinus ponderosa Dougl. ex P. & C. Laws trees in response to seasonal drought when they are growing under different competition level. The following variables were studied: branch and stem hydraulic conductivity, canopy and stomatal conductance (gc, gs), transpiration (E), photosynthesis (Amax), wood d13C (as a proxy of intrinsic WUE), leaf to sapwood area ratio (AL:As) and growth in the biggest (B) and the smallest (S) trees of high (H) and low (L) density stands. AL:As was positively correlated with tree size and negatively correlated with competition level, increasing leaf hydraulic conductance in H trees. Accordingly, higher gc and E per unit AL were found in H than in L trees when soil water availability was high, but decreased abruptly during dry periods. BL trees maintained stable gc and E values even during the summer drought. The functional adjustments observed in H trees allow them to maintain their hydraulic integrity (no apparent ks losses), but their stem and leaf growth were severely affected by drought events. iWUE was similar between all tree groups in a wet season, whereas it significantly decreased in SH trees in a dry season suggesting that when radiation and water are co-limiting gas exchange, functional adjustments not only affect absolute growth, but also WUE.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
HYDRAULIC CONDUCTANCE
dc.subject
LEAF TO SAPWOOD AREA RATIO
dc.subject
WATER USE EFFICIENCY
dc.subject
INTRASPECIFIC COMPETITION
dc.subject.classification
Silvicultura
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dc.subject.classification
Agricultura, Silvicultura y Pesca
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
Short- and long-term responses to seasonal drought in ponderosa pines growing at different plantation densities in Patagonia, South America
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-03-29T17:28:22Z
dc.journal.volume
26
dc.journal.number
6
dc.journal.pagination
1905-1917
dc.journal.pais
Alemania
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dc.description.fil
Fil: Gyenge, Javier Enrique. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce. Agencia de Extensión Rural Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
dc.description.fil
Fil: Fernandez, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible - Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce. Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible; Argentina
dc.description.fil
Fil: Varela, Santiago Agustín. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Patagonia Norte. Estación Experimental Agropecuaria San Carlos de Bariloche. Agencia de Extensión Rural El Bolsón; Argentina
dc.journal.title
Trees
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1007/s00468-012-0759-7
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00468-012-0759-7
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