Navegando por Autor "Kronberg, M."
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Ítem Acceso Abierto Aplicación de bioensayos ecotoxicológicos para evaluar la calidad del agua del arroyo Cañuelas (Buenos Aires, Argentina).(Tecnología Y Ciencias Del Agua, 2021-01) Sykora, V. ; Clavijo, A.; Calvo, D. ; Kronberg, M. ; Díaz, S.; Gómez, C. ; Munarriz, E.; Rossen, A.La inclusión de los análisis ecotoxicológicos en los estudios ambientales resulta indispensable, pues aporta información sobre los efectos que los contaminantes puedan causar en los organismos expuestos y en los ecosistemas receptores. El objetivo del trabajo fue evaluar la calidad del agua en la cuenca del arroyo Cañuelas (Buenos Aires, Argentina), a partir de determinaciones fisicoquímicas y de bioensayos ecotoxicológicos estandarizados en diferentes niveles tróficos con los organismos: Pseudokirchneriella subcapitata, Lactuca sativa y Caenorhabditis elegans. Las muestras se extrajeron de cuatro puntos de muestreo representativos a lo largo del cauce de los arroyos Cañuelas y Navarrete. P. subcapitata y la raíz de L. sativa presentaron los valores más altos de inhibición del crecimiento en los puntos de muestreo coincidentes con un mayor deterioro de la calidad del agua de acuerdo con los niveles propuestos por la normativa local. Por el contrario, C. elegans reveló toxicidad en muestras cuyos parámetros fisicoquímicos cumplieron con la normativa vigente. Los resultados de este trabajo respaldan la necesidad de incorporar una batería de bioensayos ecotoxicológicos que complementen los análisis fisicoquímicos y contribuyan a una mejor gestión de los recursos hídricos.Ítem Acceso Abierto Integrated water quality assessment of two Rivers Basins from a semiarid region of Argentina(Environmental Science and Pollution Research, 2023-12) Kronberg, M. ; Rossen, A. ; Clavijo, A. ; Manetti, M. ; Moya, A. ; Calvo, D. ; Mariani, A. ; Hernández, R. ; Salatino, S. ; Morábito, J.; Rossi, M. ; Munarriz, E.Ítem Acceso Abierto The nematode Caenorhabditis elegans as an integrated toxicological tool to assess water quality and pollution(Elsevier Science, 2016-11) Clavijo, A. ; Kronberg, M. ; Rossen, A.; Moya, A. ; Calvo, D. ; Salatino, S. ; Pagano, E. ; Morabito, J.; Munarriz, E.Determination of water quality status in rivers is critical to establish a sustainable water management policy. For this reason, over the last decades it has been recommended to perform integrated water assessments that include water quantities and physicochemical, ecological and toxicological tests. However, sometimes resources are limited and it is not possible to perform large-scale chemical determinations of pollutants or conduct numerous ecotoxicological tests. To overcome this problem we use and measure the growth, as a response parameter, of the soil nematode Caenorhabditis elegans to assess water quality in rivers. The C. elegans is a ubiquitous organism that has emerged as an important model organism in aquatic and soil toxicology research. The Tunuyán River Basin (Province of Mendoza, Argentina) has been selected as a representative traditional water monitoring system to test the applicability of the C. elegans toxicological bioassay to generate an integrated water quality evaluation. Jointly with the C. elegans toxic assays, physicochemical and bacteriological parameters were determined for each monitoring site. C. elegans bioassays help to identify different water qualities in the river basin. Multivariate statistical analysis (PCA and linear regression models) has allowed us to confirm that traditional water quality studies do not predict potential toxic effects on living organisms. On the contrary, physicochemical and bacteriological analyzes explain < 62% of the C. elegans growth response variability, showing that ecotoxicological bioassays are important to obtain a realistic scenario of water quality threats. Our results confirm that the C. elegans bioassay is a sensible and suitable tool to assess toxicity and should be implemented in routine water quality monitoring.Ítem Acceso Abierto Uso de categorías toxicológicas como herramienta para la evaluación de la calidad del agua de dos cuencas fluviales de una región semiárida de Argentina(Juan Carlos Bertoni, Pablo Daniel Spalletti, Leandro David Kazimierski, XXVII Congreso Nacional del Agua., 2023-08) Rossen, A.; Kronberg, M.; Clavijo, A.; Manetti, M. ; Moya, A. ; Calvo, D. ; Mariani, A. ; Hernández, R. ; Salatino, S. ; Morábito, J. ; Rossi, M. ; Munarriz, E.Ítem Acceso Abierto Water quality and toxicological impact assessment using the nematode Caenorhabditis elegans bioassay in a long-term intensive agricultural area(Water, Air, & Soil Pollution, Springer International Publishing, 2017-08-03) Clavijo, A. ; Rossen, A.; Calvo, D.; Kronberg, M. ; Moya, A. ; Pagano, E. ; Munarriz, E.Due to intensive agricultural activities to meet the growing needs for food, large volumes of water are consumed and an increasing amount of agrochemicals are released into the environment threatening the aquatic ecosystem. In order to ensure a sustainable agricultural management, it is crucial to develop an integrated water assessment plan that includes not only water quantity and quality but also toxicological assessments. The Pergamino River basin (province of Buenos Aires, Argentina) was selected as a representative case of study to monitor and assess the impact of both the long-term intensification of soybean production and fast-growing urban development on surface and groundwater sources. Physicochemical analyses and a Water Quality Index were determined and showed that water quality falls into the marginal category, compromising the irrigation purposes and threatening aquatic life. Glyphosate and aminomethylphosphonic acid were detected at least once in all sites. Caenorhabditis elegans toxic bioassays were performed and a toxicological ranking was developed. This analysis proved to be useful to detect toxicity even when water parameters met regulatory requirements and water quality seemed to be satisfactory. This research constitutes a valuable model to be replicated in other river basins that have been impacted by intensive agriculture and growing urban development in order to assess water quality conditions and ensure sound water resources management.