Benthic diatoms and some environmental conditions in three lowland streams

This article reports on the ecological preferences of benthic diatoms in relation to pH, conductivity and organic pollution-eutrophication and their tolerance spectrums. Three Pampean streams subjected to different human impacts were studied. The bottom substrate of these streams is mostly composed...

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Autores principales: Licursi, Magdalena, Gómez, Nora
Formato: Articulo
Lenguaje:Inglés
Publicado: 2002
Materias:
Ciencias Naturales
Argentina
Benthic diatoms
Lowland streams
Tolerance spectrums
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84967
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84967
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Argentina
Benthic diatoms
Lowland streams
Tolerance spectrums
spellingShingle Ciencias Naturales
Argentina
Benthic diatoms
Lowland streams
Tolerance spectrums
Licursi, Magdalena
Gómez, Nora
Benthic diatoms and some environmental conditions in three lowland streams
topic_facet Ciencias Naturales
Argentina
Benthic diatoms
Lowland streams
Tolerance spectrums
description This article reports on the ecological preferences of benthic diatoms in relation to pH, conductivity and organic pollution-eutrophication and their tolerance spectrums. Three Pampean streams subjected to different human impacts were studied. The bottom substrate of these streams is mostly composed of slime-clay with low proportions of gravel and sand; in consequence, the epipelon is the most represented benthic community. Samples were taken seasonally between 1997-1998 at 9 sampling sites. In each sampling station ten sub-samples were collected by pipetting a superficial layer (5-10 mm) of sediment from different places. Physico-chemical parameters were measured. Considering the ranges of pH, conductivity and organic pollution-eutrophication the diatom's tolerance spectrums were established. 162 diatom species were identified. More than 50 % of species occurred in sites where the conductivity was lower than 600 μS cm<SUP>-1</SUP>. More than 50 % of species had their preference range in sites with moderate organic matter and nutrient content. Diatom species found show defined preferences for organic pollution-eutrophication, but show less consistent responses for conductivity and, particularly, hydrogen ions content.
format Articulo
Articulo
author Licursi, Magdalena
Gómez, Nora
author_facet Licursi, Magdalena
Gómez, Nora
author_sort Licursi, Magdalena
title Benthic diatoms and some environmental conditions in three lowland streams
title_short Benthic diatoms and some environmental conditions in three lowland streams
title_full Benthic diatoms and some environmental conditions in three lowland streams
title_fullStr Benthic diatoms and some environmental conditions in three lowland streams
title_full_unstemmed Benthic diatoms and some environmental conditions in three lowland streams
title_sort benthic diatoms and some environmental conditions in three lowland streams
publishDate 2002
url http://sedici.unlp.edu.ar/handle/10915/84967
work_keys_str_mv AT licursimagdalena benthicdiatomsandsomeenvironmentalconditionsinthreelowlandstreams
AT gomeznora benthicdiatomsandsomeenvironmentalconditionsinthreelowlandstreams
bdutipo_str Repositorios
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