Descomposición de macrófitas en el arroyo Las Flores (Buenos Aires)

The macrophytes contribute significantly to the autochthonous primary production of the streams of the Buenos Aires province. Their biomass is partly exported, mainly during floods, and partly incorporated to the detritus pathway of the water bodies. The aim of this study is to determine the losses...

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Detalles Bibliográficos
Autores principales: Gantes, P., Momo, Fernando Roberto, Sánchez Caro, A., Gómez, J.
Formato: Articulo
Lenguaje:Español
Publicado: 2006
Materias:
Ciencias Naturales
macrophytes; decomposition; streams; Lemna gibba; Ceratophyllum demersum
Buenos Aires (Argentina)
macrófitas
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/69446
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-69446
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Naturales
macrophytes; decomposition; streams; Lemna gibba; Ceratophyllum demersum
Buenos Aires (Argentina)
macrófitas
spellingShingle Ciencias Naturales
macrophytes; decomposition; streams; Lemna gibba; Ceratophyllum demersum
Buenos Aires (Argentina)
macrófitas
Gantes, P.
Momo, Fernando Roberto
Sánchez Caro, A.
Gómez, J.
Descomposición de macrófitas en el arroyo Las Flores (Buenos Aires)
topic_facet Ciencias Naturales
macrophytes; decomposition; streams; Lemna gibba; Ceratophyllum demersum
Buenos Aires (Argentina)
macrófitas
description The macrophytes contribute significantly to the autochthonous primary production of the streams of the Buenos Aires province. Their biomass is partly exported, mainly during floods, and partly incorporated to the detritus pathway of the water bodies. The aim of this study is to determine the losses in weight and nitrogen along the process of decomposition of Lemna gibba and Ceratophyllum demersum, two of the dominant species in the Las Flores stream. A total of 40 bags with 4 g (fresh weight) of L. gibba and 10 g of C. demersum were set in two sites of the stream. Periodically, 4 samples of each species were redrawn, and the dry weight and total nitrogen concentration were determined. L. gibba lost 50% of its weight in 4 days, from then on and until the end of the incubation period (50 days) the weight kept approximately constant, fitted to a Hill’s function with a maximum rate of 0.158 day-1. The weight of C. demersum was almost stable until day 44, and at the end of the following 42 days it was observed that it had lost 62% of its initial weight, with a constant rate of k = 0.0203 day-1. In L. gibba essay, nitrogen concentration lowered from 3.4% to 2.4% in the first 48 hours, thus representing a 52% loss of the total nitrogen content of the plant. For C. demersum, nitrogen concentration decayed from 4.1% until 3.2%; by the end of the sampling, the total nitrogen content had reduced to 33.5% of the initial value. The results indicate that, given the quickness of the decomposition and nutrient release, an important part of the production can be incorporated to the material cycles of the stream before the plants are washed downstream during floods.
format Articulo
Articulo
author Gantes, P.
Momo, Fernando Roberto
Sánchez Caro, A.
Gómez, J.
author_facet Gantes, P.
Momo, Fernando Roberto
Sánchez Caro, A.
Gómez, J.
author_sort Gantes, P.
title Descomposición de macrófitas en el arroyo Las Flores (Buenos Aires)
title_short Descomposición de macrófitas en el arroyo Las Flores (Buenos Aires)
title_full Descomposición de macrófitas en el arroyo Las Flores (Buenos Aires)
title_fullStr Descomposición de macrófitas en el arroyo Las Flores (Buenos Aires)
title_full_unstemmed Descomposición de macrófitas en el arroyo Las Flores (Buenos Aires)
title_sort descomposición de macrófitas en el arroyo las flores (buenos aires)
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/69446
work_keys_str_mv AT gantesp descomposiciondemacrofitasenelarroyolasfloresbuenosaires
AT momofernandoroberto descomposiciondemacrofitasenelarroyolasfloresbuenosaires
AT sanchezcaroa descomposiciondemacrofitasenelarroyolasfloresbuenosaires
AT gomezj descomposiciondemacrofitasenelarroyolasfloresbuenosaires
bdutipo_str Repositorios
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