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Browsing Artículos científicos by Author "20297476093"
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Análisis de la evolución del clima y los pastizales naturales en el noroeste de la provincia de Chubut, Argentina, durante el período 2000-2014: identificación de variables asociadas a la disminución de las existencias ganaderas en la región
Garcia Martinez, Guillermo Carlos; Ciari, Georgina; Gaitan, Juan Jose; Caruso, Cecilia Alejandra; Nagahama, Nicolas; Opazo, Walter Javier; Nakamatsu, Viviana Beatriz; Lloyd, Carlos Eduardo; Antiman Cotut, Camila Rosa; Irisarri, Jorge Gonzalo Nicolás; Escobar, Juan Maria (2017-06)Una elevada proporción del territorio argentino corresponde a tierras secas y una tercera parte de éstas se hallan en la Patagonia. Esta región históricamente ha sufrido procesos de deterioro del pastizal. Generalmente, ... -
Effects of dietary supplementation on vegetation cover and its defoliation by sheep in extensive husbandry
Garcia Martinez, Guillermo Carlos; Caruso, Cecilia Alejandra; Villa, Martin Diego; Ceballos, Demian; Opazo, Walter Javier; Beloqui, Alfonso; Curcio, Matías Hernán (Elsevier, 2022-06-06)Dietary supplementation is one of the most used strategies to reduce the effect of environmental fluctuations in arid and semi-arid environments. We evaluated changes in vegetation and in patterns of animal defoliation as ... -
Germination requirements of two sheep-preferred grasses (Hordeum comosum and Koeleria vurilochensis var. patagonica) from semiarid Patagonian steppes
Gundel, Pedro Emilio; Irisarri, Jorge Gonzalo Nicolás; Sorzoli, N.S.; Mosso, C.E.; Garcia Martinez, Guillermo Carlos; Golluscio, Rodolfo Angel (Elsevier, 2012-03)Grazing by domestic exotic herbivores on native vegetation in Patagonian steppes has led to the deterioration of forage resources, where grasses are replaced by shrubs, and preferred grasses by non-preferred ones. Therefore, ... -
Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off
Garcia Martinez, Guillermo Carlos; Golluscio, Rodolfo Angel (Elsevier, 2021-03-09)We explored the effect of N addition and adult canopy competition on the recruitment of lost preferred species in the Patagonian steppe, where a decelerated N cycling scenario (sensu Ritchie et al., 1998) had been previously ... -
How does grazing affect soil water availability in the Patagonian steppe?
Golluscio, Rodolfo Ángel; Garcia Martinez, Guillermo Carlos; Cavagnaro, Fernando Pablo (Elsevier, 2022-06-01)In the Patagonian steppe, grazing may or may not reduce soil water availability: it may increase evaporative losses, because it reduces plant cover, but may decrease transpiration losses because it decreases plant biomass. ... -
Variabilidad germinativa en semillas de diferentes poblaciones de cuatro especies de gramíneas nativas de patagonia : un estudio de caso en el noroeste de Chubut
Nagahama, Nicolas; Garcia Martinez, Guillermo Carlos; Buduba, Carlos Guillermo; Opazo, Walter Javier; Caruso, Cecilia Alejandra; Ciari, Georgina (2016)Germinative variability of seeds from different populations of four species of native grasses from Patagonia: a case study in northwestern Chubut. In this study, we analyzed the quality and germination behavior of seeds ...