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2. Riparian forests: a temporal analysis of their ecological status in urban river systems of the Andean Patagonia, Chubut, Argentina.

Author

Papazian, Gabriela, Kutschker, Adriana M, and Rovere, Adriana E

Subjects
*RIPARIAN forests, *WATERSHEDS, *NATURALNESS (Environmental sciences), *CITIES & towns, *WATER quality
Abstract

Streams and rivers are ecosystems strongly impacted by changes associated with urbanization, which cause ecological degradation of their banks and the deterioration in water quality. Assessing the ecological state of riverbanks and proposing measures to mitigate their degradation are priorities. This study aimed to evaluate the quality of riparian forests in three urban river systems with different population densities and to analyze changes over a temporal scale. The pre-urban, urban and post-urban sections of the rivers were analyzed. The Quality Index of Riparian Forests for Andean Patagonian rivers (QBRp) was used. This index assesses four riverbank attributes: vegetation cover, vegetation structure, cover quality and degree of naturalness of the river channel. In all cases, pre-urban sections showed the highest QBRp values, indicating good quality riverbanks. The application of the index at different times allowed the identification of temporal changes in the ecological quality of the riverbanks, both in general and regarding individual components. A general trend of stability or improvement in the ecological quality of the riverbanks was recorded in peri-urban sections; meanwhile, urban and one post-urban sections displayed a decrease in quality, a condition related to modifications in the structure and quality of vegetation and the loss of the river channel naturalness. Urban areas with medium-high population density were associated with poor quality riverbanks. The QBRp index enables the assessment of how urbanization affects diverse aspects of riparian quality over time and supports the development of concrete actions for the effective management of these riparian environments. [ABSTRACT FROM AUTHOR]

Published
2024
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4. La Red de Restauración Ecológica de la Argentina (REA): Avances, vacíos y rumbo a seguir

Author

Pérez, Daniel R., primary, Meli, Paula, additional, Renison, Daniel, additional, Barri, Fernando, additional, Beider, Adriana, additional, Burgueño, Gabriel, additional, Dalmasso, Antonio, additional, Dardanelli, Sebastián, additional, de Paz, Manuel, additional, Farinaccio, Fernando, additional, Papazian, Gabriela, additional, Sirombra, Martín, additional, and Torres, Romina, additional

Published
2018
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5. Ecological Status of a Patagonian Mountain River: Usefulness of Environmental and Biotic Metrics for Rehabilitation Assessment

Author

Bava José, Miserendino M. Laura, Manna La Ludmila, M. Kutschker Adriana, Papazian Gabriela, Prinzio Y. Di Cecilia, and Brand Cecilia

Subjects
0106 biological sciences, Conservation of Natural Resources, RIPARIAN ECOSYSTEMS, Floodplain, Otras Ciencias Biológicas, Forest management, Argentina, 010501 environmental sciences, Forests, Poaceae, 01 natural sciences, Trees, Ciencias Biológicas, Soil, HABITAT QUALITY, Rivers, Water Movements, Riparian forest, Animals, PLANTS, FOREST CONSERVATION, LAND USE, Ecosystem, 0105 earth and related environmental sciences, Riparian zone, Hydrology, Global and Planetary Change, geography, geography.geographical_feature_category, Land use, Ecology, MACROINVERTEBRATES, 010604 marine biology & hydrobiology, Altitude, Urbanization, Pollution, Invertebrates, Habitat, Environmental science, Species richness, Eutrophication, CIENCIAS NATURALES Y EXACTAS, Environmental Monitoring
Abstract

This work evaluates the consequences of anthropogenic pressures at different sections of a Patagonian mountain river using a set of environmental and biological measures. A map of risk of soil erosion at a basin scale was also produced. The study was conducted at 12 sites along the Percy River system, where physicochemical parameters, riparian ecosystem quality, habitat condition, plants, and macroinvertebrates were investigated. While livestock and wood collection, the dominant activities at upper and mean basin sites resulted in an important loss of the forest cover still the riparian ecosystem remains in a relatively good status of conservation, as do the in-stream habitat conditions and physicochemical features. Besides, most indicators based on macroinvertebrates revealed that both upper and middle basin sections supported similar assemblages, richness, density, and most functional feeding group attributes. Instead, the lower urbanized basin showed increases in conductivity and nutrient values, poor quality in the riparian ecosystem, and habitat condition. According to the multivariate analysis, ammonia level, elevation, current velocity, and habitat conditions had explanatory power on benthos assemblages. Discharge, naturalness of the river channel, flood plain morphology, conservation status, and percent of urban areas were important moderators of plant composition. Finally, although the present land use in the basin would not produce a significant risk of soil erosion, unsustainable practices that promotes the substitution of the forest for shrubs would lead to severe consequences. Mitigation efforts should be directed to protect headwater forest, restore altered riparian ecosystem, and to control the incipient eutrophication process. Fil: Miserendino, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina Fil: Kutschker, Adriana Mabel. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel; Argentina Fil: Brand, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina Fil: la Manna, Ludmila Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia "san Juan Bosco". Facultad de Ingeniería - Sede Esquel; Argentina Fil: Di Prinzio, Cecilia Yanina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Centro de Investigación Esquel de Montaña y Estepa Patagóica. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Centro de Investigación Esquel de Montaña y Estepa Patagónica; Argentina Fil: Gabriela, Papazian. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel; Argentina Fil: Bava, Jose Omar. Centro de Investigación y Extensión Forestal Andino-Patagónico; Argentina

Published
2016
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