Assessment of water quality in temperate-plain streams (Argentina, South America) using a multiple approach
We assessed the water quality in two pampean lotic systems (Argentina), the Juan Blanco and Buñirigo streams, subjected to different land uses (i.e., the UNESCO Biosphere Nature Reserve vs. industry and agriculture, respectively) through measurements of physicochemical data and the structural parameters of the macroinvertebrate assemblages in addition to ecotoxicological analyses. The objective was to identify the degree of ecological impairment in adversely affected areas and the consequent effects on the biota. The results obtained allowed the establishment of different water-quality classes within the study area. According to the indices applied, the downstream zone of the Buñirigo stream was categorized as moderately polluted on the basis of losses of sensitive benthic species or changes in their abundance. Likewise, acute ecotoxicological bioassays demonstrated that the water from this site had lethal effects on Caenis nemoralis (Ephemeroptera: Caenidae) larvae. This sampling point also exhibited relevant physicochemical features, such as high water conductivity and nutrient levels as well as low contents of dissolved oxygen.
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Asociación Argentina de Ecología
2012
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rev-ecoaus-article-12512023-11-02T20:41:33Z Assessment of water quality in temperate-plain streams (Argentina, South America) using a multiple approach Evaluación de la calidad del agua mediante un enfoque múltiple en arroyos de la llanura templada (Argentina, América del Sur) Ocon, Carolina S. Rodrigues Capítulo, Alberto pollution macroinvertebrates physicochemical parameters ecotoxicological analyses Pampean streams polución macroinvertebrados análisis ecotoxicológicos parámetros físico-químicos arroyos pampeanos We assessed the water quality in two pampean lotic systems (Argentina), the Juan Blanco and Buñirigo streams, subjected to different land uses (i.e., the UNESCO Biosphere Nature Reserve vs. industry and agriculture, respectively) through measurements of physicochemical data and the structural parameters of the macroinvertebrate assemblages in addition to ecotoxicological analyses. The objective was to identify the degree of ecological impairment in adversely affected areas and the consequent effects on the biota. The results obtained allowed the establishment of different water-quality classes within the study area. According to the indices applied, the downstream zone of the Buñirigo stream was categorized as moderately polluted on the basis of losses of sensitive benthic species or changes in their abundance. Likewise, acute ecotoxicological bioassays demonstrated that the water from this site had lethal effects on Caenis nemoralis (Ephemeroptera: Caenidae) larvae. This sampling point also exhibited relevant physicochemical features, such as high water conductivity and nutrient levels as well as low contents of dissolved oxygen. Se realizó un estudio de la calidad del agua en dos sistemas lóticos, los arroyos Juan Blanco y Buñirigo (Argentina), sujetos a diferente uso del suelo (el primero se ubica dentro de una reserva de Biosfera de la UNESCO, mientras que el segundo en una zona agrícolo-ganadera e industrial). Se analizaron datos físico-químicos, parámetros estructurales del ensamble de macroinvertebrados y ensayos ecotoxicológicos. El objetivo fue identificar el grado de deterioro en las áreas afectadas por efluentes y los consiguientes efectos sobre la biota. Los resultados obtenidos permitieron establecer diferentes clases de calidad del agua dentro de la zona de estudio. De acuerdo a los índices aplicados la cuenca baja del arroyo Buñirigo fue caracterizada como moderadamente contaminada sobre la base de la pérdida de especies bentónicas sensibles o cambios en su abundancia. Del mismo modo, los ensayos ecotoxicológicos agudos demostraron que el agua de este sitio tuvo efectos letales sobre larvas de Caenis nemoralis (Ephemeroptera: Caenidae). Este punto de muestreo también evidenció características físico-químicas desfavorables para la biota, como alta conductividad y niveles de nutrientes, así como bajo contenido de oxígeno. Asociación Argentina de Ecología 2012-08-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articles Artículos application/pdf https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1251 Ecología Austral; Vol. 22 No. 2 (2012): August 2012, Pages 81-158; 081-091 Ecología Austral; Vol. 22 Núm. 2 (2012): August 2012, Pages 81-158; 081-091 1667-782X 0327-5477 eng https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1251/621 Derechos de autor 2020 Carolina S. Ocon, Alberto Rodrigues Capítulo https://creativecommons.org/licenses/by/3.0/ |
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America del Sur |
| libraryname |
Asociación Argentina de Ecología |
| language |
eng |
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Digital |
| author |
Ocon, Carolina S. Rodrigues Capítulo, Alberto |
| spellingShingle |
Ocon, Carolina S. Rodrigues Capítulo, Alberto Assessment of water quality in temperate-plain streams (Argentina, South America) using a multiple approach |
| author_facet |
Ocon, Carolina S. Rodrigues Capítulo, Alberto |
| author_sort |
Ocon, Carolina S. |
| title |
Assessment of water quality in temperate-plain streams (Argentina, South America) using a multiple approach |
| title_short |
Assessment of water quality in temperate-plain streams (Argentina, South America) using a multiple approach |
| title_full |
Assessment of water quality in temperate-plain streams (Argentina, South America) using a multiple approach |
| title_fullStr |
Assessment of water quality in temperate-plain streams (Argentina, South America) using a multiple approach |
| title_full_unstemmed |
Assessment of water quality in temperate-plain streams (Argentina, South America) using a multiple approach |
| title_sort |
assessment of water quality in temperate-plain streams (argentina, south america) using a multiple approach |
| description |
We assessed the water quality in two pampean lotic systems (Argentina), the Juan Blanco and Buñirigo streams, subjected to different land uses (i.e., the UNESCO Biosphere Nature Reserve vs. industry and agriculture, respectively) through measurements of physicochemical data and the structural parameters of the macroinvertebrate assemblages in addition to ecotoxicological analyses. The objective was to identify the degree of ecological impairment in adversely affected areas and the consequent effects on the biota. The results obtained allowed the establishment of different water-quality classes within the study area. According to the indices applied, the downstream zone of the Buñirigo stream was categorized as moderately polluted on the basis of losses of sensitive benthic species or changes in their abundance. Likewise, acute ecotoxicological bioassays demonstrated that the water from this site had lethal effects on Caenis nemoralis (Ephemeroptera: Caenidae) larvae. This sampling point also exhibited relevant physicochemical features, such as high water conductivity and nutrient levels as well as low contents of dissolved oxygen. |
| publisher |
Asociación Argentina de Ecología |
| publishDate |
2012 |
| url |
https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1251 |
| work_keys_str_mv |
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