Estructura de la microfauna de la interfase agua-sedimento en el valle aluvial del río Paraná, Argentina

Authors

  • Nora G. Ojea Instituto Nacional de Limnología, José Maciá 1933, 3016 Santo Tomé, Santa Fe, Argentina

Abstract

The superficiallayer ofthe sediment arad the supernatant water provide different microhabitats for protozoan. conununities sustained by bacteria. The purpose of this study was to know the faunal composition and the distribution of the sediment-water interface in a lentic environment of the alluvial valley of the Paraná River. Samples were taken frog. El Espinillo lake during an annual cycle. The differentsampling pointsshowed.similar phvsical parameters and taxonomical.There were 178 taxonomic entities, mainly Protouxi (Testacealobosia, Ciliata y Flagellata). Shelled amoeba were the dominant group. Total density ranged from 3 to 175 ind.cm-3 , with a maximum in summer. Specific richness ranged between 15 to 59 species and .species diversity from 1.68 to 4.75.These results,suggestthatthe similarity of physical and chemicalfactors among sampling points determines an homogeneausspatial distribution ofthe microfauna asocciated to the water-sedimentinterface, showing a slighttemporal variation during spring and summer

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Published

1996-12-01

How to Cite

Ojea, N. G. (1996). Estructura de la microfauna de la interfase agua-sedimento en el valle aluvial del río Paraná, Argentina. Ecología Austral, 6(2), 137–143. Retrieved from https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1659

Issue

Vol. 6 No. 2 (1996)

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Articles

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