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Resumen
It has been observed that Eucalyptus stands show high growth dominance levels while Pinus stands show null or low growth dominance levels. We hypothesized that this differential behaviour is linked to a higher degree of physiological–biochemical plasticity in Eucalyptus than in Pinus species related to photosynthetic capacity. This leads to an increment in growth efficiency (GE) difference between the largest and the smallest trees of a stand, and [ver mas...]
dc.contributor.authorFernandez, María Elena
dc.contributor.authorFernandez Tschieder, Ezequiel
dc.contributor.authorLetourneau, Federico Jorge
dc.contributor.authorGyenge, Javier
dc.date.accessioned2019-05-08T13:42:18Z
dc.date.available2019-05-08T13:42:18Z
dc.date.issued2011-03-15
dc.identifier.issn0378-1127
dc.identifier.otherhttps://doi.org/10.1016/j.foreco.2010.12.028
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0378112710007310
dc.identifier.urihttp://hdl.handle.net/20.500.12123/5072
dc.description.abstractIt has been observed that Eucalyptus stands show high growth dominance levels while Pinus stands show null or low growth dominance levels. We hypothesized that this differential behaviour is linked to a higher degree of physiological–biochemical plasticity in Eucalyptus than in Pinus species related to photosynthetic capacity. This leads to an increment in growth efficiency (GE) difference between the largest and the smallest trees of a stand, and therefore to high growth dominance levels in Eucalyptus. To test our hypothesis we carried out a bibliographical survey and reanalyzed data from Pinus ponderosa and Pinus taeda plantations in Argentina. We found that some species within the genus Eucalyptus present higher growth dominance levels, physiological plasticity and GE differentiation than Pinus species. The mean maximum values of these traits reported for any Eucalyptus species were: growth dominance coefficient, 0.48; photosynthetic capacity increment when resource availability increases, 175%; GE difference between the largest and the smallest trees of a stand, 300%. Mean maximum values for the same traits reported for any Pinus species were 0.13, no phostosynthetic plasticity as the most frequent pattern, and 51%, respectively. In Pinus species the most frequent response to an increase in resource availability is characterized by an increase in leaf area or biomass, maintaining a similar photosynthetic capacity per unit area. However, it appears that in P. ponderosa there are some situations, characterized by a high degree of intraspecific competition, leading to a very high degree of GE differentiation which deserve future research. Although we did not find any study reporting simultaneously all variables concerning our hypothesis (growth dominance, growth efficiency differentiation and physiological plasticity) any of the circumstantial evidence found in the bibliography contrasts our hypothesis.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceForest Ecology and Management 261 (6) : 1061-1068 (March 2011)es_AR
dc.subjectPinuses_AR
dc.subjectEucalyptuses_AR
dc.subjectPlasticidad Fenotípicaes_AR
dc.subjectPhenotypic Plasticityeng
dc.subjectCrecimientoes_AR
dc.subjectGrowtheng
dc.subjectVariedadeses_AR
dc.subjectVarietieseng
dc.titleWhy do Pinus species have different growth dominance patterns than Eucalyptus species? A hypothesis based on differential physiological plasticityes_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA Barilochees_AR
dc.description.filFil: Fernandez, Marí­a Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentinaes_AR
dc.description.filFil: Fernandez Tschieder, Ezequiel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Delta del Paraná; Argentinaes_AR
dc.description.filFil: Letourneau, Federico Jorge. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Campo Forestal General San Martín; Argentinaes_AR
dc.description.filFil: Gyenge, Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentinaes_AR
dc.subtypecientifico


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