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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, ... -
Desertification and ecosystem services supply : the case of the Arid Chaco of South America
Veron, Santiago Ramón; Blanco, Lisandro Javier; Texeira González, Marcos Alexis; Irisarri, Jorge Gonzalo Nicolás; Paruelo, José María (Elsevier, 2018-12)New integrated perspectives are increasingly needed to bridge the gap between biophysical and ecosystem services' based assessments of desertification. For a vast area of the dry Chaco region we sought to: (1) assess the ... -
Discrimating the biophysical signal from human - induced effects on long - tern primary production dynamics. The case of Patagonia.
Irisarri, Jorge Gonzalo Nicolás; Texeira, Marcos; Oesterheld, Martín; Veron, Santiago Ramón; Della Nave, Facundo; Paruelo, José María (Wiley, 2021-09-01)The temporal trend of aboveground net primary production (ANPP) is frequently used to estimate the human effect on ecosystems. In water-limited ecosystems, like most grazing areas in the world, human effects act upon ANPP ... -
Functional syndromes as indicators of ecosystem change in temperate grasslands
Texeira González, Marcos Alexis; Veron, Santiago Ramón; Irisarri, Jorge Gonzalo Nicolás; Oyarzabal, Mariano; Staiano, Luciana; Baeza, Santiago; Paruelo, José María (Elsevier, 2018-09-24)The lack of an organizing conceptual framework to address ecosystem changes reduces our capacity to distinguish biophysical from direct human impacts on grassland dynamics. This is particularly important for subhumid ... -
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, ... -
Métodos de evaluación de Pastizales en Patagonia Sur
Behr, Santiago Javier; Bottaro, Hugo; Buduba, Carlos Guillermo; Buono, Gustavo Gabriel; Cesa, Ariela; Ciari, Georgina; Escobar, Juan Maria; Ferrante, Daniela; Garcia Martinez, Guillermo Carlos; González, Liliana; Irisarri, Jorge Gonzalo Nicolás; Lateulade, Jose Ignacio; Livraghi, Enrique; Massara Paletto, Virginia; Nakamatsu, Viviana Beatriz; Oliva, Gabriel Esteban; Paredes, Paula Natalia; Peri, Pablo Luis; Rial, Pablo Eduardo; Utrilla, Victor Ricardo; Villa, Martin Diego (Ediciones INTA, 2020-08)Prólogo de la presente edición: “En los últimos cincuenta años hemos observado cómo ha ido reduciéndose el stock ganadero de las provincias patagónicas. Se han ensayado muchas estrategias de fortalecimiento de la ganadería ... -
Modelling inter-annual variation in dry matter yield and precipitation use efficiency of perennial pastures and annual forage crops sequences
Ojeda, Jonathan Jesus; Caviglia, Octavio; Irisarri, Jorge Gonzalo Nicolás; Agnusdei, Monica Graciela (2018)In livestock systems of the Argentinean Pampas, its forage production stability relies on the integration of two landcovers, annual forage crop sequences and perennial pastures. Despite the key role that these forage ... -
Primary production of lowland natural grasslands and upland sown pastures across a narrow climatic gradient
Durante, Martin; Piñeiro, Gervasio; Oesterheld, Martin; Irisarri, Jorge Gonzalo Nicolás (2017-04)Variation in aboveground net primary production (ANPP) is usually studied across wide environmental gradients focusing on spatial averages of zonal natural communities. We studied the spatial and temporal variation of ANPP ... -
Remotely Sensed Spatiotemporal Variation in Crude Protein of Shortgrass Steppe Forage
Irisarri, Jorge Gonzalo Nicolás; Durante, Martin; Derner, Justin D.; Oesterheld, Martin; Augustine, David J. (MDPI, 2022-02)In the Great Plains of central North America, sustainable livestock production is dependent on matching the timing of forage availability and quality with animal intake demands. Advances in remote sensing technology provide ... -
Trends in ANPP response to temperature in wetland meadows across a subcontinental gradient in Patagonia
Irisarri, Jorge Gonzalo Nicolás; Cipriotti, Pablo Ariel; Texeira, Marcos; Curcio, Matías Hernán (Multidisciplinary Digital Publishing Institute (MDPI), 2022-06-17)Due to ongoing global warming, seasonal patterns of aboveground net primary production (ANPP) may be altered by temperature trends. Of particular interest is the seasonal association between ANPP and temperature at the ... -
Trends of aboveground net primary productivity of Patagonian meadows, the omitted ecosystem in desertification studies
Curcio, Matías Hernán; Irisarri, Jorge Gonzalo Nicolás; Garcia Martinez, Guillermo Carlos; Oesterheld, Martin (MDPI, 2023-05-08)The United Nations defines desertification as the loss of productivity in arid and semiarid environments. The extended steppes of Patagonia harbor small meadows whose compounded area is comparatively small, but their ... -
Using APAR to Predict Aboveground Plant Productivity in Semi-Arid Rangelands: Spatial and Temporal Relationships Differ
Gaffney, Rowan; Porensky, Lauren M.; Feng, Gao; Irisarri, Jorge Gonzalo Nicolás; Durante, Martin; Derner, Justin D.; Augustine, David J. (2018)Monitoring of aboveground net primary production (ANPP) is critical for effective management of rangeland ecosystems but is problematic due to the vast extent of rangelands globally, and the high costs of ground-based ...