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Mostrando ítems 1-19 de 19
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Adaptability to climate change in forestry species : drought effects on growth and wood anatomy of ponderosa pines growing at different competition levels
Fernandez, María Elena; Gyenge, Javier; De Urquiza, Maria Mercedes; Varela, Santiago Agustin (2012)More stressful conditions are expected due to climatic change in several regions, including Patagonia, South-America. In this region, there are no studies about the impact of severe drought events on growth and wood ... -
Afforestations and wetlands, are they a good combination? Study of water fluxes in two cases of Patagonian wetlands
Weigandt, Mariana Noemi; Gyenge, Javier; Fernandez, María Elena; Varela, Santiago Agustin; Schlichter, Tomas Miguel (Wiley, 2015-04)Wetlands are ecosystems that play a key role in maintaining biodiversity and associated economies (e.g. agriculture and livestock) because they are reservoirs of water and carbon. Globally, these environments have been ... -
Assessment of resistance to xylem cavitation in cordilleran cypress using near-infrared spectroscopy
Sergent, Anne Sophie; Segura, Vincent; Charpentier, Jean-Paul; Dalla Salda, Guillermina; Fernandez, María Elena; Rozenberg, Philippe; Martinez Meier, Alejandro (Elsevier, 2020-04)Characterizing drought resistance of forest trees is an important aim in the worldwide context of increasing forest decline and dieback. Furthermore, wood demand is increasing all around the world, urging the need for the ... -
Caracterización silvícola de ñirantales del norte de la Patagonia para la gestión forestal sostenible = Silvicultural characterization of the mixed ñire forests of northern Patagonia as a basis for sustainable forestry
Requea, José A.; Sarasola, Mauro Miguel; Gyenge, Javier; Fernandez, María Elena (Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, 2007-04-30)A pesar de la amplia distribución geográfica y uso de los ñirantales, son muy escasos los trabajos descriptivos sobre la silvicultura en estas comunidades forestales, centrándose principalmente en las zonas donde el ñire ... -
Does competition management improve the ecophysiological response to water shortage of mixed woodland species of North Patagonia?
Varela, Santiago Agustin; Diez, Juan Pablo; Letourneau, Federico Jorge; Bianchi, Emilio; Weigandt, Mariana Noemi; Porté, A.J.; Sergent, Anne Sophie; Nacif, Marcos E.; Garibaldi, Lucas Alejandro; Fernandez, María Elena (Elsevier, 2023-08)Globally, the increasing forests vulnerability and drought-induced forest mortality events, extended to a larger scale, may have the potential to rapidly alter forest functioning and the provision of ecosystem services. ... -
Dynamics of cavitation in a Douglas-fir tree-ring: transition-wood, the lord of the ring?
Dalla Salda, Guillermina; Fernandez, María Elena; Sergent, Anne Sophie; Rozenberg, Philippe; Badel, Eric; Martinez Meier, Alejandro (INRA, 2014-11)The objective of this work wa s to investigate the dynamics of embolism formation within a Douglas fir tree ring . Four resistant and four vulnerable 10 year old trees were selected among 50 trees, based on their P 50 . ... -
Ecophysiological basis of wood formation in ponderosa pine : linking water flux patterns with wood microdensity variables
Martinez Meier, Alejandro; Fernandez, María Elena; Dalla Salda, Guillermina; Gyenge, Javier Enrique; Licata, Julián Andrés; Rozenberg, Philippe (2015-06)Climate and stands management have an effect on the process of wood formation via resource availability. To improve knowledge of wood quantity and physical structure, increment cores of ponderosa pine were taken in high- ... -
Ecuaciones para la estimación de biomasa aérea y volumen de fuste de algunas especies leñosas nativas en el valle del río Foyel, NO de la Patagonia argentina = Equations for above-ground biomass and stem volume of some native woody species growing in Foyel valley, NW Patagonia Argentina
Gyenge, Javier; Fernandez, María Elena; Sarasola, Mauro Miguel; De Urquiza, Maria Mercedes; Schlichter, Tomas Miguel (Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, 2009-08-31)Los bosques y matorrales dominados por ñire (Nothofagus antarctica) se encuentran entre los ecosistemas de mayor distribución latitudinal dentro de los bosques andino patagónicos, conformando gran parte del ecotono ... -
Effect of stand density and pruning on growth of ponderosa pines in NW Patagonia, Argentina
Gyenge, Javier Enrique; Fernandez, María Elena; Schlichter, Tomas Miguel (2010-03)Due to the lack of knowledge about ponderosa pine performance under silvopastoral systems (SPS) conditions, the objective of this study was to determine the effect of stand density and pruning on the growth magnitude of ... -
Intensity and number of thinning operations affect the response of Eucalyptus grandis to water availability and extreme drought events
Giana, Fabián Eduardo; Martinez Meier, Alejandro; Mastrandrea, Ciro Andres; Garcia, Maria De Los Angeles; Caniza, Federico Javier; Monteoliva, Silvia Estela; Gyenge, Javier; Fernandez, María Elena (Elsevier, 2023-02)Climate change has induced an increase in the frequency and intensity of droughts and heat waves, reducing growth and increasing the mortality risk of both natural and planted forests. Management practices are expected to ... -
Is forage productivity of meadows influenced by the afforestation of upstream hillsides? A study in NW Patagonia
Weigandt, Mariana Noemi; Gyenge, Javier Enrique; Fernandez, María Elena; Varela, Santiago Agustin; Schlichter, Tomas Miguel (2011)Meadows are important reserves of water, with a key role in the maintenance of the biodiversity and productivity of ecosystems. In Patagonia, Argentina, afforestation with fast-growing exotic conifers has slowly but ... -
Is forage productivity of meadows influenced by the afforestation of upstream hillsides? A study in NW Patagonia = Afecta la presencia de forestaciones ubicadas en las laderas aguas arriba de mallines su productividad forrajera? Un estudio en el Noroeste Patagónico
Weigandt, Mariana Noemi; Gyenge, Javier; Fernandez, María Elena; Varela, Santiago Agustin; Schlichter, Tomas Miguel (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), (España), 2011-04-13)Meadows are important reserves of water, with a key role in the maintenance of the biodiversity and productivity of ecosystems. In Patagonia, Argentina, afforestation with fast-growing exotic conifers has slowly but ... -
Modeling leaf maximum net photosynthetic rate of Festuca pallescens, the dominant perennial grass of Patagonian pine-based silvopastoral systems
Caballe, Gonzalo; Fernandez, María Elena; Gyenge, Javier; Aparicio, Alejandro Gabriel; Schlichter, Tomas Miguel (2011-09)The integrated relationship in a simple mechanistic model between the critical environmental factors controlling leaf photosynthesis of understory species would be a useful tool to optimize the management of the silvopastoral ... -
Physiological and morphological short-term responses to light and temperature in two Nothofagus species of Patagonia, South America
Varela, Santiago Agustin; Fernandez, María Elena; Gyenge, Javier Enrique; Aparicio, Alejandro Gabriel; Bruzzone, Octavio Augusto; Schlichter, Tomas Miguel (2012-12)The study of plant responses to environmental stress factors is essential for management of plant systems and for anticipating their response to climate change. The main goal of this study was to determine morphological ... -
Seedling drought stress susceptibility in two deciduous Nothofagus species of NW Patagonia
Varela, Santiago Agustin; Gyenge, Javier Enrique; Fernandez, María Elena; Schlichter, Tomas Miguel (2010-06)The physiological capacities of seedlings to cope with drought may be subject to strong selective pressure in the context of future climate scenarios, threatening the regeneration and sustainability of forests. Characterization ... -
Stand density and drought interaction on water relations of Nothofagus antarctica : contribution of forest management to climate change adaptability
Gyenge, Javier Enrique; Fernandez, María Elena; Sarasola, Mauro Miguel; Schlichter, Tomas Miguel (2011-12)Nothofagus antarctica is the most representative species of the native mixed forest occupying ecotone areas between forests and steppe in NW Patagonia, South-America. In this type of environment, vulnerability to climate ... -
Towards sustainable forestry development in Patagonia: truths and myths of environmental impacts of plantations with fast-growing conifers
Gyenge, Javier; Fernandez, María Elena; Rusch, Veronica Elena; Sarasola, Mauro Miguel; Schlichter, Tomas Miguel (2010)In NW Patagonia region, Argentina, South-America, there are about 70,000 ha of planted forests replacing from native forests to grasslands with different degrees of deterioration due to previous land use. Although forestry ... -
Uso del agua y productividad de los bosques nativos e implantados en el NO de la Patagonia : aproximaciones desde la ecohidrología y la ecofisiología
Gyenge, Javier Enrique; Fernandez, María Elena; Licata, Julián Andrés; Weigandt, Mariana Noemi; Bond, Barbara J.; Schlichter, Tomas Miguel (2011-12)Existe preocupación por el posible uso excesivo de agua de las forestaciones con especies exóticas de rápido crecimiento en comparación con las especies nativas a las cuales reemplazan en la región NO de la Patagonia. ... -
Why do Pinus species have different growth dominance patterns than Eucalyptus species? A hypothesis based on differential physiological plasticity
Fernandez, María Elena; Fernandez Tschieder, Ezequiel; Letourneau, Federico Jorge; Gyenge, Javier (Elsevier, 2011-03-15)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 ...