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Mostrando ítems 1-20 de 20
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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 ... -
Can biosolids compost improve, in the short term, native vegetation and soils fertility in burned Nothofagus pumilio forest in Patagonia, Argentina? = ¿Puede el compost de biosólidos mejorar a corto plazo la vegetación nativa y las características de fertilidad del suelo en un bosque quemado de Nothofagus pumilio en la Patagonia Argentina?
Varela, Santiago Agustin; Gobbi, Miriam E.; Laos, Francisca (Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, 2011)In the Patagonian Andean forests, wildfires principally have an anthropic origin and constitute one of the most important disturbances. They lead to severe losses of soil fertility and vegetation; particularly compromising ... -
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. ... -
Ecosystem services to support environmental and socially sustainable decision-making
Rusch, Veronica Elena; Rusch, Graciela Mónica; Goijman, Andrea Paula; Varela, Santiago Agustin; Claps, Leonardo (Asociación Argentina de Ecología, 2017-04)The theory of ecosystem services (ES) needs to be operationalized to contribute to practices leading to sustainable use of ecosystems, which includes solving trade-offs between private and public benefits and incorporating ... -
Enhanced high-spatial resolution radiographic images based on COTS CMOS image sensors applied to wood dendrochronology and densitometry
Corzi, Damian Leonel; Lipovetzky, Jose; Alcalde Bessia, Fabricio Pablo; Baqué, Laura; Sergent, Anne Sophie Marie; Pérez, Martín; Sofo Haro, Miguel; Artola Vinciguerra, Ignacio Carlos; Martinez Meier, Alejandro; Dalla Salda, Guillermina; Varela, Santiago Agustin; Gómez Berisso, Mariano (Elsevier, 2024-03)The imaging of wood samples using X-rays for the study of dendrochronology and densitometry is predominantly conducted through analog films subsequently digitized or, in more advanced instances, with expensive flat-panel ... -
Evaluation of plantation and early development of five alternatives to ponderosa pine in silvopastoral systems in northwest Patagonia, Argentina
Varela, Santiago Agustin; Caballe, Gonzalo; Willems, Priscila Mabel; Diez, Juan Pablo; Godoy, María Marcela (2016)En la región patagónica de Argentina, silvopastoril, los sistemas se basan en las plantaciones de coníferas exóticas en pastizales naturales del ecotono estepa-bosque Pino ponderosa es la especie más ampliamente utilizados ... -
Evidence on the response of Patagonian forage grasses to the mulching effect of recent tephra deposits in Argentina
Edwards, Priscila; Varela, Santiago Agustin; Lopez, Dardo Ruben; Willems, Priscila Mabel; Lopez, Aldana; Gyenge, Javier (Taylor & Francis, 2017-08-31)In Patagonia, arid and semiarid lands are being affected both by inappropriate management practices, which are leading to degradation, and by volcanic activity, whose effects are still unclear. This study aimed to test ... -
Growth response of Pinus contorta to the synergy of stress factors: successive extreme drought events and a population outbreak of Sirex noctilio in NW Patagonia
Weigandt, Mariana Noemi; Villacide, Jose Maria; Bianchi, Emilio; Varela, Santiago Agustin (Springer, 2022-02)The synergy of biotic and abiotic stress factors influences the response in growth, resistance, recovery and resilience of forest systems. This study used a dendrochronological approach to analyze the annual radial increase ... -
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 ... -
Manejo de Bosques con Ganadería Integrada en Patagonia argentina: ajuste metodológico para la determinación de la línea de base en ecosistemas complejos y paisajes heterogéneos = Forest Management with Integrated Livestock in Argentine Patagonia: methodological adjustment for determining the baseline in complex ecosystems and heterogeneous landscapes
Varela, Santiago Agustin; Diez, Juan Pablo; Gazzotti, Juan Ignacio; Valiña, Pablo; Furlan, Natalia; Cardozo, Andrea; Cancino, Andrea Karina; Farina, Clara Maria; Castillo, Daniel Alejandro; Umaña, Fernando; Raffo, Fernando; Borrelli, Laura Beatriz; Claps, Leonardo; Aramayo, Maria Valeria Del Lu; Amoroso, Mariano Martín; Quinteros, Claudia Pamela; Von Müller, Axel; Trinco, Fabio; Hernandez, Hernan Hector; Peri, Pablo Luis (Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, 2023-05)El Manejo del Bosque con Ganadería Integrada (MBGI) es una propuesta técnica que se basa en el manejo de los componentes forestal, ganadero, forrajero y ambiental, articulada como un plan predial factible de implementar. ... -
Morpho-physiological responses of Nothofagus obliqua to light intensity and water status, with focus on primary growth dynamics
Torres, Cristian Daniel; Magnin, Amaru; Varela, Santiago Agustin; Stecconi, Marina; Grosfeld, Javier Edgardo; Puntieri, Javier G. (Springer Nature, 2018-10)Primary growth affects plant plasticity by influencing the number, spatial arrangement and time of differentiation of the leaves. For Nothofagus obliqua, we evaluated if primary shoot growth dynamics determines short-term ... -
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 ... -
Physiological status of conifer seedlings treated with radiation, drought and frost stress mitigation techniques: a laboratory assessment
Varela, Santiago Agustin; Weigandt, Mariana Noemi; Willems, Priscila Mabel; Bianchi, Emilio; Diez, Juan Pablo; Gyenge, Javier Enrique (2016)En la región oriental del noroeste de la Patagonia, se levanta del rápido crecimiento de coníferas exóticas Pinus ponderosa (pino ponderosa) y Pseudotsuga menziesii (Abeto de Douglas) se están estableciendo en lugares que ... -
Receta práctica paso a paso para construir dendrómetros de punto de bajo costo
Diez, Juan Pablo; De Paz, Manuel; Varela, Santiago Agustin; Dalla Sald, Guillermina; Sergent, Anne Sophie; Martinez Meier, Alejandro (Asociación Argentina de Ecología, 2020-08)Los dendrómetros automáticos de punto son equipos de medición que se usan en la actividad forestal para medir en alta resolución espacial y temporal las variaciones en el fuste de los árboles. Esta información con gran ... -
ROS-Scavenging Enzymes as an Antioxidant Response to High Concentration of Anthracene in the Liverwort Marchantia polymorpha L.
Spinedi, Nahuel; Storb, Romina; Aranda, Elisabet; Romani, Facundo; Svriz, Maya; Varela, Santiago Agustin; Moreno, Javier E.; Fracchia, Sebastian; Cabrera, Juan; Batista-García, Ramón Alberto; Ponce de León, Inés; Scervino, j. Martin (MDPI, 2021-07)Marchantia polymorpha L. responds to environmental changes using a myriad set of physiological responses, some unique to the lineage related to the lack of a vascular- and root-system. This study investigates the physiological ... -
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 ... -
Uso del compost de biosólidos en la formulación de sustratos para la producción industrial de plantas de Nothofagus alpina = Evaluation of an alternative substrate and a differential nutritional dose on the production and final quality of seedlings of Nothofagus alpina in NW Patagonia
Varela, Santiago Agustin; Martinez, Abel Hector Maria (Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, 2013)Uno de los principales problemas para producir plantas forestales industrialmente es disponer de sustrato de buena calidad en cantidad suficiente. El objetivo de este estudio fue evaluar la factibilidad biológica del uso ... -
Water-mediated changes in plant–plant and biological soil crust–plant interactions in a temperate forest ecosystem
Pissolito, Clara; Garibotti, Irene Adriana; Varela, Santiago Agustin; Arana, María Veronica; Gonzalez Polo, Marina; Marchelli, Paula; Bruzzone, Octavio Augusto (Copernicus Publications, 2019-04-09)In the quest to understand how biotic interactions respond to climate change, one area that remains poorly explored is how interactions involving organisms other than vascular plants will respond. However the interactions ...