Response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (Rio de la Plata, Argentina)

The ingress of an urban stream carrying high contaminant loads into a large coastal river originates a “dispersion plume” subject to the hydrological conditions of a river affected by tidal influences. In the present study 21 sites within the “contaminant plume” of the Riachuelo River in the Rio de...

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Detalles Bibliográficos
Autores principales:	Paggi, Analía Constancia, Ocón, Carolina, Tangorra, Mariana, Rodrigues Capítulo, Alberto
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2006
Materias:	Ciencias Naturales benthic macroinvertebrates biological index industrial contaminants dispersion plume large river
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/132583
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-132583
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales benthic macroinvertebrates biological index industrial contaminants dispersion plume large river
spellingShingle	Ciencias Naturales benthic macroinvertebrates biological index industrial contaminants dispersion plume large river Paggi, Analía Constancia Ocón, Carolina Tangorra, Mariana Rodrigues Capítulo, Alberto Response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (Rio de la Plata, Argentina)
topic_facet	Ciencias Naturales benthic macroinvertebrates biological index industrial contaminants dispersion plume large river
description	The ingress of an urban stream carrying high contaminant loads into a large coastal river originates a “dispersion plume” subject to the hydrological conditions of a river affected by tidal influences. In the present study 21 sites within the “contaminant plume” of the Riachuelo River in the Rio de la Plata were analysed on the same date in order to evaluate the biological status of the area which receives this strong environmental impact, and to examine its effect on the zoobenthic communities. Diversity, taxonomic richness, abundance, physico-chemical parameters and a biological index (IMRP) were used to assess the responses of the macroinvertebrates. The correlation between exposure and effect was calculated by means of the exposure index (IEX). The relationship between the macroinvertebrate communities and environmental variables was examined using CCA analysis. Conductivity, Cr, BOD and COD, were most strongly correlated with Axis 1, suggesting the existence of a gradient of environmental degradation. The most severely contaminated sites (IMRP= 1.1–2.5; IEX = 100–78%) were all characterized by a reduced community dominated by Nematoda and Oligochaeta. A moderate response was observed between 1400 and 1600 m from the coast (IMRP = 2.6–3.9; IEX = 36%) largely owing to the physico-chemical characteristics of the recipient river which contributed to moderating the effect of the anthopogenic perturbation. For statistical validation, this area was compared with historical physico-chemical and biological data, where OD and COD showed the same tendency throughout the 10-year period.
format	Articulo Articulo
author	Paggi, Analía Constancia Ocón, Carolina Tangorra, Mariana Rodrigues Capítulo, Alberto
author_facet	Paggi, Analía Constancia Ocón, Carolina Tangorra, Mariana Rodrigues Capítulo, Alberto
author_sort	Paggi, Analía Constancia
title	Response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (Rio de la Plata, Argentina)
title_short	Response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (Rio de la Plata, Argentina)
title_full	Response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (Rio de la Plata, Argentina)
title_fullStr	Response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (Rio de la Plata, Argentina)
title_full_unstemmed	Response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (Rio de la Plata, Argentina)
title_sort	response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (rio de la plata, argentina)
publishDate	2006
url	http://sedici.unlp.edu.ar/handle/10915/132583
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bdutipo_str	Repositorios
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Response of the zoobenthos community along the dispersion plume of a highly polluted stream in the receiving waters of a large river (Rio de la Plata, Argentina)

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