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...
Guardado en:
Autores principales: | , |
---|---|
Formato: | Articulo |
Lenguaje: | Inglés |
Publicado: |
2002
|
Materias: | |
Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84967 |
Aporte de: |
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 |
_version_ |
1764820488773697539 |