The pleuston of Pistia stratiotes in “Barranqueras” pond (Chaco Prov. Argentina Rep.)

A floating carpet of Pistia stratiotes in the “Barranqueras” pond (near Paraná river) has been studied in their vegetation and faunal composition during the period October, 1974 to December, 1975 by monthly sampling operations.The samples were collected in several points along the main radial sectio...

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Autores principales: Neiff, Alicia Poi, Neiff, Juan José
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/8259
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Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-8259
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spelling I48-R154-article-82592025-05-23T13:40:25Z The pleuston of Pistia stratiotes in “Barranqueras” pond (Chaco Prov. Argentina Rep.) El pleuston de Pistia stratiotes de la laguna Barranqueras (Chaco, Argentina) Neiff, Alicia Poi Neiff, Juan José A floating carpet of Pistia stratiotes in the “Barranqueras” pond (near Paraná river) has been studied in their vegetation and faunal composition during the period October, 1974 to December, 1975 by monthly sampling operations.The samples were collected in several points along the main radial section by mean a special circular sampler with 32 cm diameter. In the freíd operations, also were taken structural data of vegetal population, like density, plant size, growth phases, and general fenology, recording at the same time the most interesting limnological parameters.In the laboratory, the animáis were removed by washing the vegetation in sieves of different size, followed by Berlese funnel treatment. The material was identified at the best posible systematic level, estimating the numerical density and the biomass. The population of aquatic invertebrates associated with Pistia stratiotes varied between 3200 and 18000 organisms/m^, and the standing crop was less than 4,45 g/m2 (dry weigth). The result did not exceed 21,5 g/m2 including the macrofauna.The vegetal biomass fluctuate between 394 and 166 g/m^ (dry weigth) According to the data obtained, the mesofauna never reach 5 o/o of the total vegetal biomass, attaining a maximun of 8 o/o if the macrofauna are considered. Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025-05-23 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/8259 Ecosur; 1977: vol. 4, no. 7; 69-101 0325-108X spa https://revistas.unne.edu.ar/index.php/eco/article/view/8259/7842 https://creativecommons.org/licenses/by/4.0/
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 Neiff, Alicia Poi
Neiff, Juan José
spellingShingle Neiff, Alicia Poi
Neiff, Juan José
The pleuston of Pistia stratiotes in “Barranqueras” pond (Chaco Prov. Argentina Rep.)
author_facet Neiff, Alicia Poi
Neiff, Juan José
author_sort Neiff, Alicia Poi
title The pleuston of Pistia stratiotes in “Barranqueras” pond (Chaco Prov. Argentina Rep.)
title_short The pleuston of Pistia stratiotes in “Barranqueras” pond (Chaco Prov. Argentina Rep.)
title_full The pleuston of Pistia stratiotes in “Barranqueras” pond (Chaco Prov. Argentina Rep.)
title_fullStr The pleuston of Pistia stratiotes in “Barranqueras” pond (Chaco Prov. Argentina Rep.)
title_full_unstemmed The pleuston of Pistia stratiotes in “Barranqueras” pond (Chaco Prov. Argentina Rep.)
title_sort pleuston of pistia stratiotes in “barranqueras” pond (chaco prov. argentina rep.)
description A floating carpet of Pistia stratiotes in the “Barranqueras” pond (near Paraná river) has been studied in their vegetation and faunal composition during the period October, 1974 to December, 1975 by monthly sampling operations.The samples were collected in several points along the main radial section by mean a special circular sampler with 32 cm diameter. In the freíd operations, also were taken structural data of vegetal population, like density, plant size, growth phases, and general fenology, recording at the same time the most interesting limnological parameters.In the laboratory, the animáis were removed by washing the vegetation in sieves of different size, followed by Berlese funnel treatment. The material was identified at the best posible systematic level, estimating the numerical density and the biomass. The population of aquatic invertebrates associated with Pistia stratiotes varied between 3200 and 18000 organisms/m^, and the standing crop was less than 4,45 g/m2 (dry weigth). The result did not exceed 21,5 g/m2 including the macrofauna.The vegetal biomass fluctuate between 394 and 166 g/m^ (dry weigth) According to the data obtained, the mesofauna never reach 5 o/o of the total vegetal biomass, attaining a maximun of 8 o/o if the macrofauna are considered.
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/8259
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