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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| Autores principales: | , , |
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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 |
| Aporte de: |
| Sumario: | 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. |
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