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Mostrando ítems 21-39 de 39
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Management of Nothofagus genetic resources: Definition of genetic zones based on a combination of nuclear and chloroplast marker data
Azpilicueta, Maria Marta; Gallo, Leonardo Ariel; van Zonneveld, Maarten; Thomas, E.; Moreno, Angela Carolina; Marchelli, Paula (Elsevier, 2013-08-15)Development of appropriate forest conservation and management measures for a given tree species includes the identification of distinct genetically homogeneous units across its overall distribution range, which depends on ... -
Mixed Nothofagus forest management: a crucial link between regeneration, site and microsite conditions
Sola, Georgina Giselle; El Mujtar, Veronica Andrea; Attis Beltran, Hernan; Chauchard, Luis Mario; Gallo, Leonardo Ariel (Springer Nature, 2020)Canopy openings due to harvesting practices constitute a disturbance that changes the environmental conditions of microsites. Its impact on the relative performance of the regeneration of different tree species could also ... -
Pattern of natural introgression in a Nothofagus hybrid zone from South American temperate forests
El Mujtar, Veronica Andrea; Sola, Georgina Giselle; Aparicio, Alejandro Gabriel; Gallo, Leonardo Ariel (Springer-Verlag Berlin Heidelberg, 2017-03-29)Interspecific gene flow is a common phenomenon in Nothofagaceae species; however, the dynamics of introgression in hybrid zones remains largely unknown. We focused on two ecologically and morphologically different Nothofagus ... -
Phenotypic variation of basic wood density in Pinus ponderosa plus trees = Variación fenotípica de la densidad básica de la madera de árboles plus de Pinus ponderosa
Martinez Meier, Alejandro; Gallo, Leonardo Ariel; Pastorino, Mario Juan; Mondino, Victor Alejandro; Rozenberg, Philippe (Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, 2011)Phenotypic selection generally reduces the variability of both the selected trait and other associated characteristics. Some species show a negative strong relationship between growth traits and wood ... -
Phylogeography of two hybridizing southern beeches (Nothofagus spp.) with different adaptive abilities
Soliani, Carolina; Gallo, Leonardo Ariel; Marchelli, Paula (Springer, 2011-12-17)In phylogenetically related plant species, hybridization can influence their current genetic structure. Long-lasting hybridization may be related to persistence in shared glacial refugia, where the differential abilities ... -
Ring density record of phenotypic plasticity and adaptation to drought in Douglas-fir
Martinez Meier, Alejandro; Sanchez, Leopoldo; Dalla Salda, Guillermina; Gallo, Leonardo Ariel; Pastorino, Mario Juan; Rozenberg, Philippe (Elsevier, 2009-08)Microdensity profiles of Douglas-fir’s clones and weather data were used to study phenotypic plasticity (dendroplasticity). Within-ring microdensity was interpreted as the variation of tree response to drought constraints ... -
Robles in Lagunas de Epulauquen, Argentina: previous and recent evidence of their distinctive character
Azpilicueta, Maria Marta; Pastorino, Mario Juan; Puntieri, Javier Guido; Barbero, Fernando Alvaro; Martinez Meier, Alejandro; Marchelli, Paula; Gallo, Leonardo Ariel (2014-12)The northernmost ‘robles’ of Argentina, located in Lagunas de Epulauquen (northwest Patagonia), are considered a population of Nothofagus obliqua, even though they differ in some respects from individuals of other populations ... -
Searching for molecular insight on hybridization in Nothofagus spp. forest at Lagunas de Epulauquen, Argentina = Estudio de la hibridación a nivel molecular en bosques de Nothofagus spp. en Lagunas de Epulauquen, Argentina
Azpilicueta, Maria Marta; El Mujtar, Veronica Andrea; Gallo, Leonardo Ariel (2016)Los bosques en Lagunas de Epulauquen (36º49’S; 71º04’O) han sido considerados como la población más septentrional de Nothofagus obliqua en Argentina. En años recientes se ha cuestionado su verdadero estatus. La convergencia ... -
Seed dormancy responses to temperature relate to Nothofagus species distribution and determine temporal patterns of germination across altitudes in Patagonia
Arana, María Verónica; Gonzalez Polo, Marina; Martinez Meier, Alejandro; Gallo, Leonardo Ariel; Benech-Arnold, Roberto Luis; Sanchez, Rodolfo Augusto; Batlla, Diego (2015-08-26)Seeds integrate environmental cues that modulate their dormancy and germination. Although many mechanisms have been identified in laboratory experiments, their contribution to germination dynamics in existing communities ... -
Seeding Resilient Restoration: An Indicator System for the Analysis of Tree Seed Systems
Atkinson, Rachel J.; Thomas, Evert; Roscioli, Federico; Cornelius, Jonathan P.; Zamora Cristales, Rene; Franco Chuaire, Maria; Alcázar, Carolina; Mesén, Francisco; Lopez, Hariet; Ipinza, Roberto; Donoso, Pablo J.; Gallo, Leonardo Ariel; Nieto, Victor; Ugarte, Julio; Sáenz Romero, Cuauhtémoc; Fremout, Tobias; Jalonen, Riina; Gaisberger, Hannes; Vinceti, Barbara; Valette, Michel; Bosshard, Ennia; Ekué, Marius; Wiederkehr Guerra, Gabriela; Kettle, Chris (MDPI, 2021-08-09)Achieving multi-million-hectare commitments from countries around the world to restore degraded lands in resilient and sustainable ways requires, among other things, huge volumes of tree planting material. Seed systems ... -
Sex-related difference in susceptibility to cypress mortality in Austrocedrus chilensis from Northwestern Patagonia (Argentina) = Susceptibilidad diferencial al mal del ciprés entre sexos de Austrocedrus chilensis en la Patagonia (Argentina)
El Mujtar, Veronica Andrea; Pareja Perdomo, Mariano; Gallo, Leonardo Ariel; Grau, Oscar (Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, 2012)Female and male individuals of dioecious species have different reproductive functions and sex-related differences have been reported in growth rate, age at maturity, size, spatial distribution and physiological responses ... -
Shaping forces modelling genetic variation patterns in the naturally fragmented forests of a South-American Beech
Azpilicueta, Maria Marta; Gallo, Leonardo Ariel (Elsevier, 2009-10)Fourteen natural populations of the South-American Beech Nothofagus obliqua at the Eastern naturally fragmented area of its distribution range were subjected to genetic analysis using genetic markers. The genetic ... -
Stand development stages and recruitment patterns influence fine-scale spatial genetic structure in two Patagonian Nothofagus species
Sola, Georgina Giselle; Marchelli, Paula; Gallo, Leonardo Ariel; Chauchard, Luis Mario; El Mujtar, Veronica Andrea (Springer, 2022-05)Key message: Nothofagus alpina (Poepp. et Endl.) Oerst. and Nothofagus obliqua (Mirb.) Oerst forests have strong fine-scale spatial genetic structures. The intensity of genetic structure patterns differed according to ... -
Staying close: short local dispersal distances on a managed forest of two Patagonian Nothofagus species
Sola, Georgina Giselle; El Mujtar, Veronica Andrea; Gallo, Leonardo Ariel; Vendramin, Giovanni Giuseppe; Marchelli, Paula (Oxford University Press, 2020-05)Understanding the impact of management on the dispersal potential of forest tree species is pivotal in the context of global change, given the implications of gene flow on species evolution. We aimed to determine the effect ... -
The effects of Quaternary glaciations in Patagonia as evidenced by chloroplast DNA phylogeography of Southern beech Nothofagus obliqua
Azpilicueta, Maria Marta; Marchelli, Paula; Gallo, Leonardo Ariel (Springer, 2009-03)Climatic oscillations during the Quaternary strongly affected the distribution of warm-temperate tree species, which experienced local restrictions into ice-free areas and posterior expansions. To evaluate the impact of ... -
Variability in seedling emergence traits of Patagonian Cypress marginal steppe populations
Pastorino, Mario Juan; Sa, Mercedes Susana; Aparicio, Alejandro Gabriel; Gallo, Leonardo Ariel (Springer, 2014-01)Genetic information on adaptive traits is crucial for prediction of the evolution of natural populations in relation to global climate change. The seedling emergence process together with germination is a key adaptive stage ... -
Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America
Aparicio, Alejandro Gabriel; Pastorino, Mario Juan; Martinez Meier, Alejandro; Gallo, Leonardo Ariel (Universidad Austral de Chile, 2009)Increasing risks of loosing forest genetic resources and the need for a sustainable quality wood supply make focusing research efforts on undomesticated tree species necessary. The study of their genetic variation in ... -
What is hot in tree rings? The wood density of surviving Douglas-firs to the 2003 drought and heat wave
Martinez Meier, Alejandro; Sanchez, Leopoldo; Pastorino, Mario Juan; Gallo, Leonardo Ariel; Rozenberg, Philippe (Elsevier, 2008-08)In a global warming scenario, drought and heat waves like the one that occurred in 2003 in Europe are expected to become more intense and frequent. This extreme climate event strongly affected the hydraulic balance in many ... -
Within-population variability in architectural traits and suitability to forestry conditions in Nothofagus nervosa (= N. alpina; Nothofagaceae)
Puntieri, Javier Guido; Grosfeld, Javier Edgardo; Tejera, Luis; Mondino, Victor Alejandro; Gallo, Leonardo Ariel (2013-07)Context: There is evidence that Nothofagus nervosa (= N. alpina) is suitable for timber production in temperate regions due to its wood quality and fast growth. However, high intra-specific variability in the architectural ...