Articulos de INST. ARG. DE NIVOLOGIA, GLACIOLOGIA Y CS. AMBIENT http://hdl.handle.net/11336/190 2024-04-06T07:48:35Z 2024-04-06T07:48:35Z Rojas, Juan Facundo Sironi, Osvaldo Horacio Martin, Facundo Damian http://hdl.handle.net/11336/232157 2024-04-05T14:31:29Z 2023-01-01T00:00:00Z

Sequías en Mendoza (Argentina): una mirada sociohistórica desde la segunda mitad del siglo XIX; Water scarcity in Mendoza (Argentina): a socio–historical look from the second half of the 19th century Rojas, Juan Facundo; Sironi, Osvaldo Horacio; Martin, Facundo Damian Este trabajo analiza los procesos de escasez hídrica que impactaron en los territorios de la provincia de Mendoza (Argentina) durante la segunda mitad del siglo XIX hasta finales del XX. Desde una perspectiva histórico–ambiental se analizan estos hitos hidroclimáticos considerando la visión de diversos actores sociales del territorio provincial a partir de datos obtenidos de fuentes documentales. Comparando el inicio del estudio con las últimas décadas se evidencia un desbalance entre el progresivo —y pronunciado— incremento demográfico y un bajo crecimiento de las tierras productivas agrícolas, que polarizó aún más la dualidad entre el uso de agua para la producción agraria y para consumo doméstico, especialmente urbano. También emergen otros usos, como el energético, vinculado a represas hidroeléctricas, y la importancia del sector comercial en las voces que se escuchan con más fuerza en los medios de comunicación.; This research analyzes the processes of water scarcity that impacted the territories of the province of Mendoza (Argentina) from the second half of the nineteenth century until the end of the twentieth. From a historical–environmental perspective, we explores will analyze these hydroclimatic situations from the perspective of various social actors of the provincial territory based on the data obtained from documentary sources.

2023-01-01T00:00:00Z Lopasso, Ailin M. Tapia, Felipe Feal, Román Ondrak, Robert Sláma, Jiří Hlebszevitsch, Julio Giambiagi, Laura Beatriz Ghiglione, Matias http://hdl.handle.net/11336/232152 2024-04-05T14:24:22Z 2024-01-01T00:00:00Z

Pleistocene deformation of the Malargüe fold-thrust belt from structural modelling and geochronology of syntectonic sedimentation Lopasso, Ailin M.; Tapia, Felipe; Feal, Román; Ondrak, Robert; Sláma, Jiří; Hlebszevitsch, Julio; Giambiagi, Laura Beatriz; Ghiglione, Matias We report uplift and shortening rates from a late Neogene–Pleistocene deformation stage of the frontal fold-thrust belt and adjacent wedge-top in the Principal Cordillera of the southern Central Andes (33-39° SL). A structural model is presented based on integration of surface field data and subsurface 2D seismic sections. Shortening, uplift, and sedimentation rates were calculated from different steps of kinematic modelling. Our structural interpretations and modelling are integrated with new detrital zircon U-Pb geochronology to define a previously overlooked Pleistocene period of orogenic shortening and syntectonic sedimentation in the Malargüe basin. This task was possible due to the dating of three samples yielding between ∼12 and 1 Ma obtained from a 900 m deep well located in the foreland. From stratigraphic correlations, our data records an active Plio-Pleistocene wedge-top depozone coeval with retreat of the volcanism, and the emplacement of retroarc basalts. Structural modelling, together with detrital zircon U-Pb provenance data register shortening producing a foredeep to wedge-top Plio-Pleistocene transition, adjusting and completing the knowledge of the frontal fold-thrust belt and foreland basin in the southern Central Andes.

2024-01-01T00:00:00Z Iturburu, Fernando Gastón Bertrand, Lidwina Sorsou, Vasiliki Scheibler, Erica Elizabeth Calderon, Gabriela Altamirano, Jorgelina Cecilia Amé, María Valeria Menone, Mirta Lujan Picó, Yolanda http://hdl.handle.net/11336/231538 2024-03-26T12:10:16Z 2023-12-01T00:00:00Z

Pesticides and PPCPs in aquatic ecosystems of the andean central region: Occurrence and ecological risk assessment in the Uco valley Iturburu, Fernando Gastón; Bertrand, Lidwina; Sorsou, Vasiliki; Scheibler, Erica Elizabeth; Calderon, Gabriela; Altamirano, Jorgelina Cecilia; Amé, María Valeria; Menone, Mirta Lujan; Picó, Yolanda Uco valley (Mendoza, Argentina) suffers the concomitant effect of climate change, anthropic pressure and water scarcity. Moreover chemical pollution to aquatic ecosystems could be another pressuring factor, but it was not studied enough to the present. In this sense, the aim of this study was to assess the occurrence of pesticides, pharmaceuticals and personal care products (PPCPs) in aquatic ecosystems of the Uco Valley and to perform an ecological risk assessment (ERA). The presence of several insecticides (mainly neonicotinoids), herbicides (atrazine, diuron, metolachlor, terbutryn) and fungicides (strobilurins, triazolic and benzimidazolic compounds) in water samples in two seasons, related to crops like vineyards, garlic or fruit trees was associated to mediumand high-risk probabilities for aquatic biota. Moreover, PPCPs of the group of non-steroidal anti-inflammatory drugs, parabens and bisphenol A were detected in all the samples and their calculated risk quotients also indicated a high risk. This is the first record of pesticides and PPCPs with an ERA in this growing agricultural oasis. Despite the importance of these findings in Uco Valley for decision makers in the region, this multilevel approach could bring a wide variety of tools for similar regions in with similar productive and environmental conditions, in order to afford actions to reach Sustainable Development Goals. Synopsis: Aquatic ecosystems in arid mountain regions are threatened worldwide. This study reports relevant data about chemical pollution in Central Andes, which could be a useful tool to enhance SDGs’ accomplishment.

2023-12-01T00:00:00Z Zabala, Cecilia Aranibar, Julieta Nelida Rodriguez, Maria Daniela http://hdl.handle.net/11336/231437 2024-03-25T12:59:13Z 2023-03-01T00:00:00Z

Las comunidades criptógamas como potenciales indicadores de recuperación post-fuego en el pedemonte; Cryptogam communities as potential indicators of post-fire recovery in the piedmont Zabala, Cecilia; Aranibar, Julieta Nelida; Rodriguez, Maria Daniela Entre los disturbios que afectan los ecosistemas terrestres, el fuego es uno de los más importantes en la ecorregión del Monte. En el pedemonte, los incendios generan cambios en la composición de la vegetación y la fisonomía del paisaje, pero aún se desconocen los efectos del fuego en las criptógamas. Estas comprenden las costras biológicas del suelo (CBS), líquenes cortícolas, saxícolas y musgos. Estas comunidades son cruciales en ecosistemas degradados y en zonas áridas al cumplir funciones clave como fijar nitrógeno y estabilizar el suelo. Además, algunos de los organismos que las componen son de desarrollo lento y sensibles a disturbios, lo que los hace potenciales indicadores de disturbio o recuperación. En este trabajo evaluamos la cobertura y la frecuencia de tipos funcionales de criptógamas, y los factores ambientales que favorecen su desarrollo, para así identificar potenciales indicadores de recuperación post-fuego. Encontramos que la abundancia de líquenes saxícolas y cortícolas, la cobertura de CBS y las CBS dominadas por cianobacterias variaron según del tiempo de recuperación post-fuego. Su abundancia también resultó afectada por la cobertura de plantas vasculares, mantillo, rocas y de montículos de animales. Estas variaciones pueden utilizarse como indicios del éxito de estrategias de restauración ecológica pasiva. Los líquenes cortícolas y saxícolas pueden ser buenos indicadores de recuperación post-fuego, ya que solo están presentes en sitios con +40 años desde el último incendio y mostraron una mayor respuesta que las plantas vasculares. Las CBS dominadas por cianobacterias, —más abundantes en sitios con fuegos recientes— serían buenas indicadoras de procesos recientes de recuperación del suelo. La amplia distribución de CBS dominadas por musgos, y el desarrollo de cianobacterias en lugares recientemente disturbados resaltan la potencialidad de estos dos grupos de organismos para restaurar de forma activa ecosistemas áridos degradados por incendios.; Among the disturbances affecting terrestrial ecosystems, fire is one of the most important in the Monte ecoregion of Argentina. In the foothills, recurrent fires generate changes in the composition of the vegetation and the physiognomy of the landscape, without knowledge of the effects of fire on cryptogams. Cryptogams include biological soil crusts (BSC), corticolous and saxicolous lichens, and mosses. These communities are crucial in degraded ecosystems and in arid zones by fixing nitrogen and stabilizing the soil. Furthermore, some of the organisms of BSC develop quite slowly and are sensitive to disturbances, which makes them potentially useful as indicators of disturbance or recovery. In this work, we evaluate the cover and frequency of functional types of cryptogams, as well as the environmental factors that favor their development in sites with different fire histories, in order to identify potential indicators of post-fire recovery. We found that saxicolous and corticolous lichen frequency, BSC cover and cyanobacterial-dominated BSC frequency varied as a function of post-fire recovery time. Their cover and frequency were also affected by the cover of vascular plants, bare soil, rocks and mounds generated by animals. These variations in abundance can be used as indicators of the success of passive ecological restoration strategies. Corticolous and saxicolous lichens may function as indicators of post-fire recovery as they are only present on sites with +40 years since the latest fire and showed a greater response than vascular plants. On the other hand, CBS dominated by cyanobacteria —being more abundant in sites with recent fires— would be good indicators of more recent soil recovery processes. The wide distribution of BSC dominated by mosses, and the development of cyanobacteria in recently disturbed places, highlight the potential of these two groups of organisms to actively and more quickly restore arid ecosystems degraded by fires.

2023-03-01T00:00:00Z