Caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un Rio Urbano contaminado (Rio Reconquista, Argentina)

During 1994 monthly surface water (up to 50 cm) samples were taken from five sites (5, 10, 20, 38 and 46 km away from the origin) along the Reconquista river (Buenos Aires), which receives domestic, agricultural and industrial effluents. In order to thoroughly characterize this river and to evaluate...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Castañé, P.M., Loez, C.R., Olguín, H.F., Puig, A., Rovedatti, M.G., Topalián, M.L., Salibián, A.
Formato: JOUR
Materias:
América del Sur
Argentina
Contaminación
Fitoplancton
Parámetros fisicoquímicos
Río Reconquista
Variación espacial
Zooplancton
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01884999_v14_n2_p69_Castane
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01884999_v14_n2_p69_Castane
record_format dspace
spelling todo:paper_01884999_v14_n2_p69_Castane2023-10-03T15:08:53Z Caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un Rio Urbano contaminado (Rio Reconquista, Argentina) Castañé, P.M. Loez, C.R. Olguín, H.F. Puig, A. Rovedatti, M.G. Topalián, M.L. Salibián, A. América del Sur Argentina Contaminación Fitoplancton Parámetros fisicoquímicos Río Reconquista Variación espacial Zooplancton During 1994 monthly surface water (up to 50 cm) samples were taken from five sites (5, 10, 20, 38 and 46 km away from the origin) along the Reconquista river (Buenos Aires), which receives domestic, agricultural and industrial effluents. In order to thoroughly characterize this river and to evaluate its spatial trends, 22 physical and chemical parameters, as well as the phyto- and Zooplankton composition and abundance were determined. Most of the physical and chemical parameters evidenced an increased water quality deterioration downstream, displaying gradients or a sudden change after the discharge of the highly polluted Moron stream. Ammonium, orthophosphates, hardness, temperature, alkalinity, BOD, COD, phenols, chlorides and conductivity increased along the river, whereas dissolved oxygen and pH decreased. The parameters that showed highest spatial variation where dissolved oxygen (19 times, when comparing the higher and lower annual means of the five sampling sites), ammonium (16 times) and BOD (6 times). Heavy metals concentration generally exceeded the aquatic life protection levels. Phytoplankton density (mean: 6 400 ind/mL) was mainly made up by Chlorophyceae, Bacillariophyceae and Cyanophyceae, while zooplankton (mean: 67 ind/L) was mainly made up by rotifers and nauplii. The mean density of total phytoplankton increased up to 38 km away from the origin, which could be interpreted as a consequence of the progressive nutrient enrichment downstream, and decreased in the last site, where toxic effects of pollutants were probably prevalent. The increasing deterioration of water quality was negatively associated with the abundance of planktonic crustaceans. Fil:Loez, C.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Olguín, H.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Puig, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rovedatti, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01884999_v14_n2_p69_Castane
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic América del Sur
Argentina
Contaminación
Fitoplancton
Parámetros fisicoquímicos
Río Reconquista
Variación espacial
Zooplancton
spellingShingle América del Sur
Argentina
Contaminación
Fitoplancton
Parámetros fisicoquímicos
Río Reconquista
Variación espacial
Zooplancton
Castañé, P.M.
Loez, C.R.
Olguín, H.F.
Puig, A.
Rovedatti, M.G.
Topalián, M.L.
Salibián, A.
Caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un Rio Urbano contaminado (Rio Reconquista, Argentina)
topic_facet América del Sur
Argentina
Contaminación
Fitoplancton
Parámetros fisicoquímicos
Río Reconquista
Variación espacial
Zooplancton
description During 1994 monthly surface water (up to 50 cm) samples were taken from five sites (5, 10, 20, 38 and 46 km away from the origin) along the Reconquista river (Buenos Aires), which receives domestic, agricultural and industrial effluents. In order to thoroughly characterize this river and to evaluate its spatial trends, 22 physical and chemical parameters, as well as the phyto- and Zooplankton composition and abundance were determined. Most of the physical and chemical parameters evidenced an increased water quality deterioration downstream, displaying gradients or a sudden change after the discharge of the highly polluted Moron stream. Ammonium, orthophosphates, hardness, temperature, alkalinity, BOD, COD, phenols, chlorides and conductivity increased along the river, whereas dissolved oxygen and pH decreased. The parameters that showed highest spatial variation where dissolved oxygen (19 times, when comparing the higher and lower annual means of the five sampling sites), ammonium (16 times) and BOD (6 times). Heavy metals concentration generally exceeded the aquatic life protection levels. Phytoplankton density (mean: 6 400 ind/mL) was mainly made up by Chlorophyceae, Bacillariophyceae and Cyanophyceae, while zooplankton (mean: 67 ind/L) was mainly made up by rotifers and nauplii. The mean density of total phytoplankton increased up to 38 km away from the origin, which could be interpreted as a consequence of the progressive nutrient enrichment downstream, and decreased in the last site, where toxic effects of pollutants were probably prevalent. The increasing deterioration of water quality was negatively associated with the abundance of planktonic crustaceans.
format JOUR
author Castañé, P.M.
Loez, C.R.
Olguín, H.F.
Puig, A.
Rovedatti, M.G.
Topalián, M.L.
Salibián, A.
author_facet Castañé, P.M.
Loez, C.R.
Olguín, H.F.
Puig, A.
Rovedatti, M.G.
Topalián, M.L.
Salibián, A.
author_sort Castañé, P.M.
title Caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un Rio Urbano contaminado (Rio Reconquista, Argentina)
title_short Caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un Rio Urbano contaminado (Rio Reconquista, Argentina)
title_full Caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un Rio Urbano contaminado (Rio Reconquista, Argentina)
title_fullStr Caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un Rio Urbano contaminado (Rio Reconquista, Argentina)
title_full_unstemmed Caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un Rio Urbano contaminado (Rio Reconquista, Argentina)
title_sort caracterización y variación espacial de parámetros fisicoquímicos y del plancton en un rio urbano contaminado (rio reconquista, argentina)
url http://hdl.handle.net/20.500.12110/paper_01884999_v14_n2_p69_Castane
work_keys_str_mv AT castanepm caracterizacionyvariacionespacialdeparametrosfisicoquimicosydelplanctonenunriourbanocontaminadorioreconquistaargentina
AT loezcr caracterizacionyvariacionespacialdeparametrosfisicoquimicosydelplanctonenunriourbanocontaminadorioreconquistaargentina
AT olguinhf caracterizacionyvariacionespacialdeparametrosfisicoquimicosydelplanctonenunriourbanocontaminadorioreconquistaargentina
AT puiga caracterizacionyvariacionespacialdeparametrosfisicoquimicosydelplanctonenunriourbanocontaminadorioreconquistaargentina
AT rovedattimg caracterizacionyvariacionespacialdeparametrosfisicoquimicosydelplanctonenunriourbanocontaminadorioreconquistaargentina
AT topalianml caracterizacionyvariacionespacialdeparametrosfisicoquimicosydelplanctonenunriourbanocontaminadorioreconquistaargentina
AT salibiana caracterizacionyvariacionespacialdeparametrosfisicoquimicosydelplanctonenunriourbanocontaminadorioreconquistaargentina
_version_ 1782029584923885568

Ejemplares similares