Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain

Floodplain lakes are especially dynamic due to the irregular flow regime of the Paraná River and its location along the geomorphologic gradient between the lakes and the river. The response of Eichhornia cras sipes (Mart.) Solms (one of the most frequent aquatic plant) was studied in two floodplai...

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Detalles Bibliográficos
Autores principales: Neiff, Juan José, Casco, Sylvina Lorena, Poi, Alicia Susana Guadalupe
Formato: Artículo
Lenguaje:Inglés
Publicado: Universidad de Costa Rica 2022
Materias:
Large rivers
Eichhornia crassipes
River pulses
Floodplain lakes
Pulsos
Planicies inundables
Grandes ríos
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/48644
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-48644
record_format dspace
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Large rivers
Eichhornia crassipes
River pulses
Floodplain lakes
Pulsos
Planicies inundables
Grandes ríos
spellingShingle Large rivers
Eichhornia crassipes
River pulses
Floodplain lakes
Pulsos
Planicies inundables
Grandes ríos
Neiff, Juan José
Casco, Sylvina Lorena
Poi, Alicia Susana Guadalupe
Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain
topic_facet Large rivers
Eichhornia crassipes
River pulses
Floodplain lakes
Pulsos
Planicies inundables
Grandes ríos
description Floodplain lakes are especially dynamic due to the irregular flow regime of the Paraná River and its location along the geomorphologic gradient between the lakes and the river. The response of Eichhornia cras sipes (Mart.) Solms (one of the most frequent aquatic plant) was studied in two floodplain lakes with different flooding regimes. Samples were taken between March 1997 and December 2001 on 13 different hydrologic conditions during prolonged hydrologic connection and prolonged hydrologic isolation. Leaf height, leaf den sity, biomass and nutrient content of the mature leaves of E. crassipes were measured and related to water level fluctuation and the hydrologic connectivity. The lake more connected with the main channel had a long lasting inundation phase. In this condition the surface area covered by water increased more than three times compared to prolonged hydrologic isolation condition. As river water entered the floodplain lakes, dissolved inorganic nitrogen increased to high values, especially NO3 - , whereas the isolation condition was characterised by a decrease in NO3 - concentrations to undetectable levels. Compared to plants growing in the more isolated lake, those growing in the more connected lake had a significantly lower leaf density, longer leaves, less root biomass and lower ratio between below-ground and above-ground biomasses. However, total and leaf biomasses were not significantly different between sites. In each lake, differences in leaf height, leaf biomass and root biomass between prolonged hydrologic connection and isolation, as well as the insignificant relationship between leaf size and leaf density, indicate that the morphological traits of E. crassipes respond to pluri-annual water level fluctuations. The highest nutrient concentration in mature leaves was registered at the end of the prolonged hydrologic connection in the more connected lake. During the prolonged isolation, leaves had more lignin and a higher L:N ratio than at high waters, at the same sites. The success of E. crassipes in occupying habitats sub jected to wide and erratic fluctuations in water level, such as the Paraná River floodplain, appears to be related to its ability to modify morphological traits according to water level.
format Artículo
author Neiff, Juan José
Casco, Sylvina Lorena
Poi, Alicia Susana Guadalupe
author_facet Neiff, Juan José
Casco, Sylvina Lorena
Poi, Alicia Susana Guadalupe
author_sort Neiff, Juan José
title Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain
title_short Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain
title_full Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain
title_fullStr Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain
title_full_unstemmed Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain
title_sort response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the paraná river floodplain
publisher Universidad de Costa Rica
publishDate 2022
url http://repositorio.unne.edu.ar/handle/123456789/48644
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AT cascosylvinalorena responseofeichhorniacrassipespontederiaceaetowaterlevelfluctuationsintwolakeswithdifferentconnectivityintheparanariverfloodplain
AT poialiciasusanaguadalupe responseofeichhorniacrassipespontederiaceaetowaterlevelfluctuationsintwolakeswithdifferentconnectivityintheparanariverfloodplain
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spelling I48-R184-123456789-486442025-03-06T10:58:23Z Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain Neiff, Juan José Casco, Sylvina Lorena Poi, Alicia Susana Guadalupe Large rivers Eichhornia crassipes River pulses Floodplain lakes Pulsos Planicies inundables Grandes ríos Floodplain lakes are especially dynamic due to the irregular flow regime of the Paraná River and its location along the geomorphologic gradient between the lakes and the river. The response of Eichhornia cras sipes (Mart.) Solms (one of the most frequent aquatic plant) was studied in two floodplain lakes with different flooding regimes. Samples were taken between March 1997 and December 2001 on 13 different hydrologic conditions during prolonged hydrologic connection and prolonged hydrologic isolation. Leaf height, leaf den sity, biomass and nutrient content of the mature leaves of E. crassipes were measured and related to water level fluctuation and the hydrologic connectivity. The lake more connected with the main channel had a long lasting inundation phase. In this condition the surface area covered by water increased more than three times compared to prolonged hydrologic isolation condition. As river water entered the floodplain lakes, dissolved inorganic nitrogen increased to high values, especially NO3 - , whereas the isolation condition was characterised by a decrease in NO3 - concentrations to undetectable levels. Compared to plants growing in the more isolated lake, those growing in the more connected lake had a significantly lower leaf density, longer leaves, less root biomass and lower ratio between below-ground and above-ground biomasses. However, total and leaf biomasses were not significantly different between sites. In each lake, differences in leaf height, leaf biomass and root biomass between prolonged hydrologic connection and isolation, as well as the insignificant relationship between leaf size and leaf density, indicate that the morphological traits of E. crassipes respond to pluri-annual water level fluctuations. The highest nutrient concentration in mature leaves was registered at the end of the prolonged hydrologic connection in the more connected lake. During the prolonged isolation, leaves had more lignin and a higher L:N ratio than at high waters, at the same sites. The success of E. crassipes in occupying habitats sub jected to wide and erratic fluctuations in water level, such as the Paraná River floodplain, appears to be related to its ability to modify morphological traits according to water level. Se analiza la respuesta de Eichhornia crassipes, una de las plantas acuáticas más frecuentes en la planicie de inundación del río Paraná, a las fluctuaciones del río en dos lagos con diferente conectividad. Las muestras fueron tomadas en 13 condiciones hidrológicas entre Marzo de 1997 y Diciembre de 2001. Durante el periodo de prolongada conectividad hidrológica, el área cubierta por el agua aumenta más de tres veces y el contenido de nitrógeno inorgánico disuelto fue mayor en comparación con la condición de prolongado aislamiento. En comparación con las plantas del lago más aislado del río, las del más conectado tuvieron significativamente menor densidad de hojas, hojas más largas, menor biomasa de raíces y menor cociente entre la biomasa de las partes aéreas y las partes sumergidas. Las diferencias en la altura y la biomasa de hojas y raíces entre diferentes condiciones hidrológicas y la no significativa relación entre el tamaño y su densidad, indican que las características morfológicas de las plantas responden a fluctuaciones del nivel del agua. Durante la prolongada conexión con el río el contenido de nutrientes de las hojas maduras fue alto, en tanto que durante el aislamiento prolongado las hojas tuvieron mayor contenido de lignina y alto cociente L:N. El éxito de Eichhornia crassipes en la ocupación de hábitats sujetos a amplias y erráticas fluctuaciones del nivel del agua parece estar relacionado con su capacidad para modificar sus características morfológicas en función de las fluctuaciones del nivel del agua. 2022-07-04T11:37:04Z 2022-07-04T11:37:04Z 2008-06 Artículo Neiff, Juan José, Casco, Sylvina Lorena y Poi de Neiff, Alicia Susana Guadalupe, 2008. Response of eichhornia crassipes (pontederiaceae) to water level fluctuations in two lakes with different connectivity in the Paraná river floodplain. Revista de Biología Tropical. Costa Rica: Universidad de Costa Rica, vol. 56, no. 2, p. 613-623. ISSN-e 2215-2075. 0034-7744 http://repositorio.unne.edu.ar/handle/123456789/48644 eng openAccess http://creativecommons.org/licenses/by-nc-nd/2.5/ar/ application/pdf application/pdf Universidad de Costa Rica Revista de Biología Tropical, 2008, vol. 56, no. 2, p. 613-623.

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