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Abstract:

This bioassay was designed with the aim of exploring the responses of two wild planktonic microalgae exposed in situ (72. h) as indicators of the changes in water quality. Monocultures of both strains within dialysis membrane bags were placed at two sites in a small lowland stream. Site 1 is located at a suburban area with low horticultural activity and Site 2 is impacted by toxic industrial discharges and urban land use.There was a decrease in population growth of both species at Site 2 compared with Site 1. The comparison of the algae exposed in situ with the normal specimens cultured at the laboratory indicated a significant increase in the cellular volume for both species at both sites. Abnormal shape was recorded at both sites, the percentage being significantly greater for Scenedesmus acutus at Site 2. Significant changes in pyrenoids size were observed in S. acutus and in the percentage of fragmented nuclei in Lepocinclis acus. Also in the latter abnormal paramylon grains were observed. These responses were accentuated at Site 2.This bioassay was sensitive, short term, low cost, and therefore is a suitable tool to contribute with the monitoring and ecological risk assessment of lowland streams. © 2011 Elsevier Inc.

Registro:

Documento: Artículo
Título:An in situ test to explore the responses of Scenedesmus acutus and Lepocinclis acus as indicators of the changes in water quality in lowland streams
Autor:Bauer, D.E.; Conforti, V.; Ruiz, L.; Gómez, N.
Filiación:Instituto de Limnología Dr. R. A. Ringuelet (CONICET-UNLP), Av. Calchaquí km 23.5, 1888 Florencio Varela, Pcia. de Buenos Aires, Argentina
Departamento de Biodiversidad y Biología Experimental, Laboratorio de Biología Comparada de Protistas, Ciudad Universitaria, FCEyN-UBA, Ciudad Autónoma de Buenos Aires, Argentina
Palabras clave:In situ bioassay; Lepocinclis acus; Monitoring; Scenedesmus acutus; Water quality; industrial chemical; bioassay; bioindicator; horticulture; in situ test; lowland environment; microalga; monitoring; monoculture; plankton; population decline; risk assessment; streamwater; water quality; algal growth; article; bioassay; cell shape; cell volume; controlled study; cost benefit analysis; dialysis membrane; ecosystem; environmental exposure; environmental monitoring; fungal cell; horticulture; land use; Lipocinclis acus; microalga; monoculture; nonhuman; population growth; risk assessment; Scenedesmus; scenedesmus acutus; sensitivity analysis; stream (river); suburban area; urban area; water quality; bioassay; chemistry; drug effect; environmental monitoring; methodology; river; water pollutant; water quality; algae; Lepocinclis acus; Scenedesmus acutus; Biological Assay; Environmental Monitoring; Microalgae; Rivers; Scenedesmus; Water Pollutants; Water Quality
Año:2012
Volumen:77
Página de inicio:71
Página de fin:78
DOI: http://dx.doi.org/10.1016/j.ecoenv.2011.10.021
Título revista:Ecotoxicology and Environmental Safety
Título revista abreviado:Ecotoxicol. Environ. Saf.
ISSN:01476513
CODEN:EESAD
CAS:Water Pollutants
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01476513_v77_n_p71_Bauer

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Citas:

---------- APA ----------
Bauer, D.E., Conforti, V., Ruiz, L. & Gómez, N. (2012) . An in situ test to explore the responses of Scenedesmus acutus and Lepocinclis acus as indicators of the changes in water quality in lowland streams. Ecotoxicology and Environmental Safety, 77, 71-78.
http://dx.doi.org/10.1016/j.ecoenv.2011.10.021
---------- CHICAGO ----------
Bauer, D.E., Conforti, V., Ruiz, L., Gómez, N. "An in situ test to explore the responses of Scenedesmus acutus and Lepocinclis acus as indicators of the changes in water quality in lowland streams" . Ecotoxicology and Environmental Safety 77 (2012) : 71-78.
http://dx.doi.org/10.1016/j.ecoenv.2011.10.021
---------- MLA ----------
Bauer, D.E., Conforti, V., Ruiz, L., Gómez, N. "An in situ test to explore the responses of Scenedesmus acutus and Lepocinclis acus as indicators of the changes in water quality in lowland streams" . Ecotoxicology and Environmental Safety, vol. 77, 2012, pp. 71-78.
http://dx.doi.org/10.1016/j.ecoenv.2011.10.021
---------- VANCOUVER ----------
Bauer, D.E., Conforti, V., Ruiz, L., Gómez, N. An in situ test to explore the responses of Scenedesmus acutus and Lepocinclis acus as indicators of the changes in water quality in lowland streams. Ecotoxicol. Environ. Saf. 2012;77:71-78.
http://dx.doi.org/10.1016/j.ecoenv.2011.10.021