Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina)

Cyanobacteria constitute the main toxin producers in inland water ecosystems and have extensive global distribution. The presence of hepatotoxins in aquatic environments is hazardous to human and animal health; even though the presence and identification of hepatotoxic microcystins in rivers and res...

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Autores principales: Forastier, Marina Elizabet, Zalocar de Domitrovic, Yolanda, Andrinolo, Darío, Domitrovic, Hugo Alberto
Formato: Artículo
Lenguaje:Inglés
Publicado: Universidad de Costa Rica 2021
Materias:
Microcystis aeruginosa
hepatotoxins
microcystins
Yacyretá dam
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/28490
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-28490
record_format dspace
spelling I48-R184-123456789-284902025-03-06T11:01:46Z Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina) Forastier, Marina Elizabet Zalocar de Domitrovic, Yolanda Andrinolo, Darío Domitrovic, Hugo Alberto Microcystis aeruginosa hepatotoxins microcystins Yacyretá dam Cyanobacteria constitute the main toxin producers in inland water ecosystems and have extensive global distribution. The presence of hepatotoxins in aquatic environments is hazardous to human and animal health; even though the presence and identification of hepatotoxic microcystins in rivers and reservoirs of the world have been confirmed by several studies in the last few years. Herein, we studied the abundance and toxicity of Microcystis aeruginosa in the Argentine section of the Paraná River at the beginning of the Middle Paraná (Corrientes Hydrometer), near Corrientes city (27º28´ S - 58º51´ W) and approximately 220 km downstream of the Yacyretá dam (High Paraná). The Paraná River basin, with a drainage area of 3.1 x 106 km2 and 3 965 km in length, is the second largest catchment of South America, after that of the Amazon. The Paraná River is the main source of drinking water supply for the Northeastern Argentine region. Phytoplankton samples were collected and environmental variables were measured in a monthly basis (exceptionally fortnightly), from March 2004 to June 2008. Fifty-eight samples were analyzed for phytoplankton density and biomass. Five samples were used for toxicity testing; the latter were obtained during the cyanobacteria blooms from 2005 to 2008. Phytoplankton counts were performed with an inverted microscope, and biomass was expressed as biovolume. Bioassays with mice and high-performance liquid chromatography (HPLC) analysis were performed to evaluate the presence of cyanotoxins. Phytoplankton mainly consisted of Cryptophyta, Chlorophyta and Bacillariophyta. Microcystis aeruginosa was identified during the warmer months each year (November to March). Density varied between 189 and 25 027 cells/mL (1-10 colonies/mL) and biomass from 0.34 to 44 mm3/L. Taking into account the number of cells, the highest abundance occurred in April 2004 (25 027 cells/mL), coinciding with the largest biovolume (44 mm3/L). All mice subjected to intraperitoneal injections with samples obtained during bloom episodes showed positive results for the presence of hepatotoxins. Three microcystins variants: LR, RR and [D-Leu1] Mcyst-LR were detected by analysis with semi-preparative high-performance liquid chromatography with diode array detector system (HPLC-PDA). This constitutes the first report of microcystins recorded during M. aeruginosa blooms in the Argentine stretch of the Paraná River at the beginning of the Middle Paraná (Corrientes Hydrometer), approximately 220 km downstream of the Yacyretá dam (High Paraná). 2021-08-26T14:20:27Z 2021-08-26T14:20:27Z 2016-03-01 Artículo Forastier, Marina Elizabet, et al., 2016. Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina). Revista de Biología Tropical. Heredia: Universidad de Costa Rica, vol. 64, no. 1, p. 203-211. ISSN 0034-7744. 2215-2075 http://repositorio.unne.edu.ar/handle/123456789/28490 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Universidad de Costa Rica Revista de Biología Tropical, 2016, vol. 64, no. 1, p. 203-211.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Microcystis aeruginosa
hepatotoxins
microcystins
Yacyretá dam
spellingShingle Microcystis aeruginosa
hepatotoxins
microcystins
Yacyretá dam
Forastier, Marina Elizabet
Zalocar de Domitrovic, Yolanda
Andrinolo, Darío
Domitrovic, Hugo Alberto
Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina)
topic_facet Microcystis aeruginosa
hepatotoxins
microcystins
Yacyretá dam
description Cyanobacteria constitute the main toxin producers in inland water ecosystems and have extensive global distribution. The presence of hepatotoxins in aquatic environments is hazardous to human and animal health; even though the presence and identification of hepatotoxic microcystins in rivers and reservoirs of the world have been confirmed by several studies in the last few years. Herein, we studied the abundance and toxicity of Microcystis aeruginosa in the Argentine section of the Paraná River at the beginning of the Middle Paraná (Corrientes Hydrometer), near Corrientes city (27º28´ S - 58º51´ W) and approximately 220 km downstream of the Yacyretá dam (High Paraná). The Paraná River basin, with a drainage area of 3.1 x 106 km2 and 3 965 km in length, is the second largest catchment of South America, after that of the Amazon. The Paraná River is the main source of drinking water supply for the Northeastern Argentine region. Phytoplankton samples were collected and environmental variables were measured in a monthly basis (exceptionally fortnightly), from March 2004 to June 2008. Fifty-eight samples were analyzed for phytoplankton density and biomass. Five samples were used for toxicity testing; the latter were obtained during the cyanobacteria blooms from 2005 to 2008. Phytoplankton counts were performed with an inverted microscope, and biomass was expressed as biovolume. Bioassays with mice and high-performance liquid chromatography (HPLC) analysis were performed to evaluate the presence of cyanotoxins. Phytoplankton mainly consisted of Cryptophyta, Chlorophyta and Bacillariophyta. Microcystis aeruginosa was identified during the warmer months each year (November to March). Density varied between 189 and 25 027 cells/mL (1-10 colonies/mL) and biomass from 0.34 to 44 mm3/L. Taking into account the number of cells, the highest abundance occurred in April 2004 (25 027 cells/mL), coinciding with the largest biovolume (44 mm3/L). All mice subjected to intraperitoneal injections with samples obtained during bloom episodes showed positive results for the presence of hepatotoxins. Three microcystins variants: LR, RR and [D-Leu1] Mcyst-LR were detected by analysis with semi-preparative high-performance liquid chromatography with diode array detector system (HPLC-PDA). This constitutes the first report of microcystins recorded during M. aeruginosa blooms in the Argentine stretch of the Paraná River at the beginning of the Middle Paraná (Corrientes Hydrometer), approximately 220 km downstream of the Yacyretá dam (High Paraná).
format Artículo
author Forastier, Marina Elizabet
Zalocar de Domitrovic, Yolanda
Andrinolo, Darío
Domitrovic, Hugo Alberto
author_facet Forastier, Marina Elizabet
Zalocar de Domitrovic, Yolanda
Andrinolo, Darío
Domitrovic, Hugo Alberto
author_sort Forastier, Marina Elizabet
title Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina)
title_short Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina)
title_full Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina)
title_fullStr Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina)
title_full_unstemmed Occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the Paraná river, downstream of the Yacyretá dam (Argentina)
title_sort occurrence and toxicity of microcystis aeruginosa (cyanobacteria) in the paraná river, downstream of the yacyretá dam (argentina)
publisher Universidad de Costa Rica
publishDate 2021
url http://repositorio.unne.edu.ar/handle/123456789/28490
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