Phytoplankton primary production of the Paraná River in the area of its confluence with Paraguay River

This paper deals with the phytoplankton structure and its primary production in the Paraná River at the confluence with the Paraguay River, and their variations with tidal and hydrological cycles. Primary production estimations were carried out using in situ incubations of light and dark bottle colu...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Bonetto, Carlos A., Zalocar, Yolanda, Caro, Patricia M., Vallejos, Eugenio R.
Formato: Artículo revista
Lenguaje:Español
Publicado: Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025
Acceso en línea:https://revistas.unne.edu.ar/index.php/eco/article/view/8535
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-8535
record_format ojs
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
author Bonetto, Carlos A.
Zalocar, Yolanda
Caro, Patricia M.
Vallejos, Eugenio R.
spellingShingle Bonetto, Carlos A.
Zalocar, Yolanda
Caro, Patricia M.
Vallejos, Eugenio R.
Phytoplankton primary production of the Paraná River in the area of its confluence with Paraguay River
author_facet Bonetto, Carlos A.
Zalocar, Yolanda
Caro, Patricia M.
Vallejos, Eugenio R.
author_sort Bonetto, Carlos A.
title Phytoplankton primary production of the Paraná River in the area of its confluence with Paraguay River
title_short Phytoplankton primary production of the Paraná River in the area of its confluence with Paraguay River
title_full Phytoplankton primary production of the Paraná River in the area of its confluence with Paraguay River
title_fullStr Phytoplankton primary production of the Paraná River in the area of its confluence with Paraguay River
title_full_unstemmed Phytoplankton primary production of the Paraná River in the area of its confluence with Paraguay River
title_sort phytoplankton primary production of the paraná river in the area of its confluence with paraguay river
description This paper deals with the phytoplankton structure and its primary production in the Paraná River at the confluence with the Paraguay River, and their variations with tidal and hydrological cycles. Primary production estimations were carried out using in situ incubations of light and dark bottle columns, assessing ^14C fixation as described by Strickland and Parsons (1968). The waters of the Paraguay River flow over a considerable distance until they fully mix with those of the Paraná River. Towards the Chaco (right) bank, the influence of the Paraguay River is very clear; the water is more turbid, and conductivity is higher (averaging 120 μS/cm). Primary production ranged from near 0 to 120 mg C/m²·d, and phytoplankton density ranged from 80 to 1600 individuals/mL. Towards the Corrientes (left) bank, water transparency increases and conductivity is lower (averaging 50 μS/cm). Primary production ranged from 3 to 285 mg C/m²·d, and plankton density from 85 to 2500 individuals/mL. In both sampling sites, diatomophyceae were the prevailing phytoplankton group, with Melosira granulata as the most abundant species, and sporadic dominance of cyanophyceae during summer. The pattern of carbon fixation throughout the year showed changes closely related to plankton concentration, water transparency, and river hydrometric levels. Primary production was low during flood periods due to great dilution of phytoplankton density and high turbidity, and it increased sharply during low water phases, favored by increased phytoplankton concentration and higher water transparency.
publisher Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
publishDate 2025
url https://revistas.unne.edu.ar/index.php/eco/article/view/8535
work_keys_str_mv AT bonettocarlosa phytoplanktonprimaryproductionoftheparanariverintheareaofitsconfluencewithparaguayriver
AT zalocaryolanda phytoplanktonprimaryproductionoftheparanariverintheareaofitsconfluencewithparaguayriver
AT caropatriciam phytoplanktonprimaryproductionoftheparanariverintheareaofitsconfluencewithparaguayriver
AT vallejoseugenior phytoplanktonprimaryproductionoftheparanariverintheareaofitsconfluencewithparaguayriver
AT bonettocarlosa produccionprimariadelfitoplanctondelrioparanaenelareadesuconfluenciaconelrioparaguay
AT zalocaryolanda produccionprimariadelfitoplanctondelrioparanaenelareadesuconfluenciaconelrioparaguay
AT caropatriciam produccionprimariadelfitoplanctondelrioparanaenelareadesuconfluenciaconelrioparaguay
AT vallejoseugenior produccionprimariadelfitoplanctondelrioparanaenelareadesuconfluenciaconelrioparaguay
first_indexed 2025-08-17T05:02:46Z
last_indexed 2025-08-17T05:02:46Z
_version_ 1840677615692677120
spelling I48-R154-article-85352025-08-08T13:52:41Z Phytoplankton primary production of the Paraná River in the area of its confluence with Paraguay River Producción primaria del fitoplancton del Río Paraná en el área de su confluencia con el Río Paraguay Bonetto, Carlos A. Zalocar, Yolanda Caro, Patricia M. Vallejos, Eugenio R. This paper deals with the phytoplankton structure and its primary production in the Paraná River at the confluence with the Paraguay River, and their variations with tidal and hydrological cycles. Primary production estimations were carried out using in situ incubations of light and dark bottle columns, assessing ^14C fixation as described by Strickland and Parsons (1968). The waters of the Paraguay River flow over a considerable distance until they fully mix with those of the Paraná River. Towards the Chaco (right) bank, the influence of the Paraguay River is very clear; the water is more turbid, and conductivity is higher (averaging 120 μS/cm). Primary production ranged from near 0 to 120 mg C/m²·d, and phytoplankton density ranged from 80 to 1600 individuals/mL. Towards the Corrientes (left) bank, water transparency increases and conductivity is lower (averaging 50 μS/cm). Primary production ranged from 3 to 285 mg C/m²·d, and plankton density from 85 to 2500 individuals/mL. In both sampling sites, diatomophyceae were the prevailing phytoplankton group, with Melosira granulata as the most abundant species, and sporadic dominance of cyanophyceae during summer. The pattern of carbon fixation throughout the year showed changes closely related to plankton concentration, water transparency, and river hydrometric levels. Primary production was low during flood periods due to great dilution of phytoplankton density and high turbidity, and it increased sharply during low water phases, favored by increased phytoplankton concentration and higher water transparency. Este trabajo trata sobre la estructura del fitoplancton y su producción primaria en el río Paraná, en la confluencia con el río Paraguay, y sus variaciones en relación con los ciclos dinámicos e hidrológicos. Las estimaciones de producción primaria se realizaron mediante incubaciones in situ con columnas de botellas claras y oscuras, evaluando la fijación de ^14C, según lo descrito por Strickland y Parsons (1968). Las aguas del río Paraguay fluyen durante una considerable distancia hasta mezclarse completamente con las del río Paraná. Hacia la margen chaqueña (derecha), la influencia del río Paraguay es muy evidente; el agua es más turbia y la conductividad es mayor (promedio de 120 μS/cm). La producción primaria varió desde casi 0 hasta 120 mg C/m²·d, y la densidad de fitoplancton osciló entre 80 y 1600 individuos/mL. Hacia la margen correntina (izquierda), aumenta la transparencia del agua y la conductividad es menor (promedio de 50 μS/cm). La producción primaria osciló entre 3 y 285 mg C/m²·d, y la densidad del plancton entre 85 y 2500 individuos/mL. En ambos sitios de muestreo, las diatomeas fueron el grupo fitoplanctónico predominante, siendo Melosira granulata la especie más abundante, con dominancia esporádica de cianofíceas durante el verano. El patrón de fijación de carbono a lo largo del año mostró cambios estrechamente relacionados con la concentración del plancton, la transparencia del agua y el nivel hidrométrico del río. La producción primaria fue baja durante los períodos de crecida debido a la gran dilución de la densidad del fitoplancton y alta turbidez, aumentando marcadamente durante la fase de bajante, favorecida por el incremento de la concentración del fitoplancton y la mayor transparencia del agua. Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025-08-08 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://revistas.unne.edu.ar/index.php/eco/article/view/8535 Ecosur; 1979: vol. 6, no. 12; 207-227 0325-108X spa https://revistas.unne.edu.ar/index.php/eco/article/view/8535/8080

Ejemplares similares