Ecological optima and tolerances of coastal benthic diatoms in the freshwater-mixohaline zone of the Río de la Plata estuary

The purpose of this study was to explore the autecology of diatom species inhabiting the epipsammon and epiphyton in the freshwater-mixohaline zone of the Río de la Plata estuary. The diatoms are a conspicuous component of those communities. We discuss the optima and tolerance ranges of diatoms for...

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Autores principales: Licursi, Magdalena, Gómez, Nora, Donadelli, Jorge Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Zoología
Autecology
Coastal-plain estuary
Diatoms
Epiphyton
Epipsammon
Optima
Rí o de la Plata
Tolerance range
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82467
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82467
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Autecology
Coastal-plain estuary
Diatoms
Epiphyton
Epipsammon
Optima
Rí o de la Plata
Tolerance range
spellingShingle Zoología
Autecology
Coastal-plain estuary
Diatoms
Epiphyton
Epipsammon
Optima
Rí o de la Plata
Tolerance range
Licursi, Magdalena
Gómez, Nora
Donadelli, Jorge Luis
Ecological optima and tolerances of coastal benthic diatoms in the freshwater-mixohaline zone of the Río de la Plata estuary
topic_facet Zoología
Autecology
Coastal-plain estuary
Diatoms
Epiphyton
Epipsammon
Optima
Rí o de la Plata
Tolerance range
description The purpose of this study was to explore the autecology of diatom species inhabiting the epipsammon and epiphyton in the freshwater-mixohaline zone of the Río de la Plata estuary. The diatoms are a conspicuous component of those communities. We discuss the optima and tolerance ranges of diatoms for the following environmental variables: conductivity, turbidity, pH, nutrients (phosphate, nitrate, nitrite, and ammonium), and dissolved oxygen levels as well as both the chemical and biological oxygen demand. The study was carried out on the Argentinean coastline between 34°27'S, 58°30'W and 35°23'S, 57°08'W. In total, 32 sampling sites influenced by different land uses were monitored along 168 km of shoreline. Epipsammic samples of the intertidal zone were taken at low tide during spring 2005, autumn and winter 2006, spring and summer 2007, and autumn 2008. Epiphytic samples were taken during summer, autumn, and spring 2000 and spring 2002. In total, 224 benthic species were identified in the 120 samples analyzed; 81 species had a frequency greater than 5% in the total sample dataset with more than 1% of relative abundance in at least 1 sample and were chosen for estimation of their optima and tolerances for selected water-quality characteristics. The physicochemical data analyzed indicated 2 gradients - increases in conductivity and turbidity along with decreases in the concentration of nutrients and organic matter - that generated different types of habitats for the species investigated.
format Articulo
Articulo
author Licursi, Magdalena
Gómez, Nora
Donadelli, Jorge Luis
author_facet Licursi, Magdalena
Gómez, Nora
Donadelli, Jorge Luis
author_sort Licursi, Magdalena
title Ecological optima and tolerances of coastal benthic diatoms in the freshwater-mixohaline zone of the Río de la Plata estuary
title_short Ecological optima and tolerances of coastal benthic diatoms in the freshwater-mixohaline zone of the Río de la Plata estuary
title_full Ecological optima and tolerances of coastal benthic diatoms in the freshwater-mixohaline zone of the Río de la Plata estuary
title_fullStr Ecological optima and tolerances of coastal benthic diatoms in the freshwater-mixohaline zone of the Río de la Plata estuary
title_full_unstemmed Ecological optima and tolerances of coastal benthic diatoms in the freshwater-mixohaline zone of the Río de la Plata estuary
title_sort ecological optima and tolerances of coastal benthic diatoms in the freshwater-mixohaline zone of the río de la plata estuary
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/82467
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