Phytoplankton primary production of the Gonzalez and Totora Ponds (Corrientes, Argentina)
The phytoplankton structure and its primary production in relation to the main limnological features of Totoras and González ponds are examined in this paper. These ponds were selected from those belonging to the Riachuelo River basin due to their extremely contrasting trophic conditions. Primary pr...
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
2025
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| Acceso en línea: | https://revistas.unne.edu.ar/index.php/eco/article/view/8528 |
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I48-R154-article-85282025-08-08T13:52:28Z Phytoplankton primary production of the Gonzalez and Totora Ponds (Corrientes, Argentina) Producción primaria del fitoplancton de lagunas del noroeste de la provincia de Corrientes Caro, Patricia M. Bonetto, Carlos A. Zalocar, Yolanda The phytoplankton structure and its primary production in relation to the main limnological features of Totoras and González ponds are examined in this paper. These ponds were selected from those belonging to the Riachuelo River basin due to their extremely contrasting trophic conditions. Primary production estimations were carried out using in situ light and dark bottle column incubations, assessing dissolved oxygen evolution until August 1977 and ^14C uptake from that date until June 1978. Totoras Pond is a moderately eutrophic water body with clear waters, high dissolved oxygen content, and submerged macrophytes covering a significant portion of the bottom. Phytoplankton diversity was very high, with 157 species, chlorophytes being the prevailing group. Primary production ranged from 0.2 to 2.5 gC/m²·d, with the vertical profile showing a maximum between 1 and 2 meters and photosynthetic inhibition in the surface layer. González Pond, a highly eutrophic water body, exhibited high turbidity due to seston abundance. The dissolved oxygen regime showed large seasonal and diurnal fluctuations, with variable decreases with depth. Phytoplankton density was consistently high, with a practically constant bloom of blue-green algae. In contrast, species diversity was low, with only 84 species identified. Primary production ranged from 0.45 to 2.45 gC/m²·d, with extremely high photosynthetic activity at the surface and a rapid decrease with depth. En este trabajo se examinan la estructura del fitoplancton y su producción primaria en relación con las principales características limnológicas de las lagunas Totoras y González. Estas lagunas fueron seleccionadas entre las pertenecientes a la cuenca del río Riachuelo debido a sus condiciones tróficas marcadamente contrastantes. Las estimaciones de producción primaria se realizaron mediante incubaciones in situ con botellas claras y oscuras en columnas, evaluando la evolución del oxígeno disuelto hasta agosto de 1977 y la absorción de ^14C desde esa fecha hasta junio de 1978. La laguna Totoras es un cuerpo de agua moderadamente eutrófico, con aguas claras, alto contenido de oxígeno disuelto y macrófitas sumergidas que cubren una parte importante del fondo. La diversidad del fitoplancton fue muy alta, con 157 especies, siendo las clorofitas el grupo predominante. La producción primaria varió entre 0,2 y 2,5 gC/m²·d, con un perfil vertical que mostró un máximo entre 1 y 2 metros y una inhibición fotosintética en la capa superficial. La laguna González, un cuerpo de agua muy eutrófico, presentó alta turbidez debido a la abundancia de seston. El régimen de oxígeno disuelto mostró grandes fluctuaciones estacionales y diurnas, con descensos variables en profundidad. La densidad del fitoplancton fue siempre alta, con una floración prácticamente constante de cianobacterias. En cambio, la diversidad de especies fue baja, identificándose solo 84 especies. La producción primaria varió entre 0,45 y 2,45 gC/m²·d, con una actividad fotosintética extremadamente alta en superficie y un rápido descenso con la profundidad. 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/8528 Ecosur; 1979: vol. 6, no. 11; 83-100 0325-108X spa https://revistas.unne.edu.ar/index.php/eco/article/view/8528/8073 |
| 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 |
Caro, Patricia M. Bonetto, Carlos A. Zalocar, Yolanda |
| spellingShingle |
Caro, Patricia M. Bonetto, Carlos A. Zalocar, Yolanda Phytoplankton primary production of the Gonzalez and Totora Ponds (Corrientes, Argentina) |
| author_facet |
Caro, Patricia M. Bonetto, Carlos A. Zalocar, Yolanda |
| author_sort |
Caro, Patricia M. |
| title |
Phytoplankton primary production of the Gonzalez and Totora Ponds (Corrientes, Argentina) |
| title_short |
Phytoplankton primary production of the Gonzalez and Totora Ponds (Corrientes, Argentina) |
| title_full |
Phytoplankton primary production of the Gonzalez and Totora Ponds (Corrientes, Argentina) |
| title_fullStr |
Phytoplankton primary production of the Gonzalez and Totora Ponds (Corrientes, Argentina) |
| title_full_unstemmed |
Phytoplankton primary production of the Gonzalez and Totora Ponds (Corrientes, Argentina) |
| title_sort |
phytoplankton primary production of the gonzalez and totora ponds (corrientes, argentina) |
| description |
The phytoplankton structure and its primary production in relation to the main limnological features of Totoras and González ponds are examined in this paper. These ponds were selected from those belonging to the Riachuelo River basin due to their extremely contrasting trophic conditions.
Primary production estimations were carried out using in situ light and dark bottle column incubations, assessing dissolved oxygen evolution until August 1977 and ^14C uptake from that date until June 1978.
Totoras Pond is a moderately eutrophic water body with clear waters, high dissolved oxygen content, and submerged macrophytes covering a significant portion of the bottom. Phytoplankton diversity was very high, with 157 species, chlorophytes being the prevailing group. Primary production ranged from 0.2 to 2.5 gC/m²·d, with the vertical profile showing a maximum between 1 and 2 meters and photosynthetic inhibition in the surface layer.
González Pond, a highly eutrophic water body, exhibited high turbidity due to seston abundance. The dissolved oxygen regime showed large seasonal and diurnal fluctuations, with variable decreases with depth. Phytoplankton density was consistently high, with a practically constant bloom of blue-green algae. In contrast, species diversity was low, with only 84 species identified. Primary production ranged from 0.45 to 2.45 gC/m²·d, with extremely high photosynthetic activity at the surface and a rapid decrease with depth. |
| 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/8528 |
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