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Mostrando ítems 1-14 de 14
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Do populations of Festuca pallescens from a rainfall gradient differ in the expression of morpho-physiological traits under drought stress?
Lopez, Aldana; Lopez, Dardo Ruben; Caballe, Gonzalo; Edwards, Priscila; Marchelli, Paula (Elsevier, 2023-06)In arid environments, stochastic rainfall and high evapotranspiration force plants to optimize water resources. North Patagonia is characterized by a deep rainfall gradient that gives rise to environments with very contrasting ... -
Ecosystemic structural–functional approach of the state and transition model
Lopez, Dardo Ruben; Cavallero, Laura; Brizuela, Miguel Angel; Aguiar, Martín Roberto (Wiley, 2011-02)Objective: To contribute to the integration of key ecological concepts such as dynamic equilibrium, critical threshold, resistance and resilience to the ‘State and Transition Model’ (STM), in order to apply them in a more ... -
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 ... -
Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters
Lopez, Aldana Soledad; Lopez, Dardo Ruben; Arana, María Veronica; Battla, Diego; Marchelli, Paula (Springer Nature, 2021-05)Sensitivity to water availability is a key physiological trait for grassland species located in arid and semiarid environments, where successful germination is closely related to rainfall dynamics. Festuca pallescens ... -
Una herramienta para monitorear sequías en regiones áridas y semiáridas de Patagonia Norte
Easdale, Marcos Horacio; Lopez, Dardo Ruben; Bianchi, Emilio; Bruzzone, Octavio Augusto; Villagra, Edgar Sebastian; Siffredi, Guillermo Lorenzo; Gaitan, Juan Jose; Umaña, Fernando; Oricchio, Patricio (Gerencia de Comunicación e Imagen Institucional, DNA SICC, INTA, 2012-08)La variabilidad ambiental es una característica de regiones pastoriles áridas y semiáridas, siendo la sequía uno de los principales problemas en sistemas ganaderos extensivos, con implicancias productivas y económicas tanto ... -
Linking ecosystem resistance, resilience, and stability in steppes of North Patagonia
Lopez, Dardo Ruben; Brizuela, Miguel Angel; Willems, Priscila Mabel; Aguiar, Martín Roberto; Siffredi, Guillermo Lorenzo; Bran, Donaldo Eduardo (Elsevier, 2013-01)The main objective of an ecosystem sustainable management is to preserve its capacity to respond and adapt to current disturbances and/or future changes, and maintain the provision of environmental goods and services. Two ... -
Local adaptation along a sharp rainfall gradient occurs in a native Patagonian grass, Festuca pallescens, regardless of extensive gene flow
Lopez, Aldana Soledad; Lopez, Dardo Ruben; Caballe, Gonzalo; Siffredi, Guillermo Lorenzo; Marchelli, Paula (Elsevier, 2020-03)Increasing global aridity combined with changing environmental conditions might cause irreparable alterations in arid and semiarid ecosystems. Knowledge of within-species genetic diversity and adaptive responses, especially ... -
Modelo de estados y transiciones de los ñirantales del NO de la Patagonia como herramienta para el uso silvopastoril sustentable
Rusch, Veronica Elena; Lopez, Dardo Ruben; Cavallero, Laura; Rusch, Graciela Mónica; Garibaldi, Lucas Alejandro; Grosfeld, Javier Edgardo; Peri, Pablo Luis (Asociación Argentina de Ecología, 2017-08)Desarrollamos un modelo de estados y transiciones (MEyT) para el bosque de ñire (Nothofagus antarctica) en el norte de la Patagonia, con el fin de sintetizar el conocimiento disperso sobre las repuestas de este sistema al ... -
Phylogenetic relationships and intraspecific diversity of a North Patagonian Fescue: evidence of differentiation and interspecific introgression at peripheral populations
Lopez, Aldana; Azpilicueta, Maria Marta; Lopez, Dardo Ruben; Siffredi, Guillermo Lorenzo; Marchelli, Paula (2018-03)Peripheral sites usually offer suboptimal conditions for species with wide distributions, where expression of phenotypic variability and potential interspecific hybridization might be enhanced. The Patagonian steppe, the ... -
Seed responses to temperature indicate different germination strategies among Festuca pallescens populations from semi-arid environments in North Patagonia
Lopez, Aldana; Marchelli, Paula; Batlla, Diego; Lopez, Dardo Ruben; Arana, María Veronica (Elsevier, 2019-04)Seed germination is one of the earliest phenotypes expressed by plants, and the accuracy to germinate in the correct time and place is essential for plant population fitness. Cues that regulate germination have been ... -
Structural–functional approach to identify post-disturbance recovery indicators in forests from northwestern Patagonia: a tool to prevent state transitions
Cavallero, Laura; Lopez, Dardo Ruben; Raffaele, Estela; Aizen, Marcelo Adrian (Elsevier, 2015-05)The disruption of the natural post-disturbance recovery process, either by changes in disturbance regime or by another disturbance, can trigger transitions to alternative degraded states. In a scenario of high disturbance ... -
Sustainable livelihoods approach through the lens of the State-ans-Transition Model in semi-arid pastoral systems
Easdale, Marcos Horacio; Lopez, Dardo Ruben (2016)Enfrentar desafíos complejos a nivel mundial en relación con el desarrollo sostenible y la gestión ambiental requiere marcos aplicados para comprender y gestionar el cambio en sistemas sociales y ecológicos complejos. A ... -
Tensiones entre conservación de ecosistemas y desarrollo territorial: hacia un abordaje socioecológico en las Ciencias Agropecuarias
Easdale, Marcos Horacio; Lopez, Dardo Ruben; Aguiar, Martín Roberto (Editorial Potificia Universidad Javeriana, 2018-06)Las ciencias agropecuarias constituyen un vínculo académico entre sociología y ecología. Actualmente, existe la predominancia de una perspectiva tecnocrática orientada a aumentar la productividad y la eficiencia, con una ... -
Tracking floristic archetypes of Patagonian steppes
Easdale, Marcos Horacio; Martin Albarracin, Valeria Leticia; Perri, Daiana Vanesa; Lopez, Dardo Ruben; Bruzzone, Octavio Augusto (Wiley, 2024-03)Questions: The classification of plant communities is a well-established practice in ecology. However, the factors that determine the distribution of common species and the extent of their dominance and overlap are still ...