Variación estacional del fitoplancton en la cuenca inferior del Río Salado (provincia de Buenos Aires)

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The main aim of this survey was to analyze seasonal variations in phytoplankton composition, relating its behaviour to temperature and conductivity, at El Destino (ED) sampling site in the Salado river lower-basin. A total of 28 phytoplankton samples were taken twice a week from 9/3 to 20/7/2004 and...

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Detalles Bibliográficos
Autores principales: Bazzuri, María Elisa, Gabellone, Néstor Adrián, Solari, Lía Cristina
Formato: Articulo
Lenguaje:Español
Publicado: 2008
Materias:
Ciencias Naturales
sucesión estacional
Río Saldo (Argentina)
potamoplancton
autocorrelación
series en el tiempo
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/67853
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-67853
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
sucesión estacional
Río Saldo (Argentina)
potamoplancton
autocorrelación
series en el tiempo
spellingShingle Ciencias Naturales
sucesión estacional
Río Saldo (Argentina)
potamoplancton
autocorrelación
series en el tiempo
Bazzuri, María Elisa
Gabellone, Néstor Adrián
Solari, Lía Cristina
Variación estacional del fitoplancton en la cuenca inferior del Río Salado (provincia de Buenos Aires)
topic_facet Ciencias Naturales
sucesión estacional
Río Saldo (Argentina)
potamoplancton
autocorrelación
series en el tiempo
description The main aim of this survey was to analyze seasonal variations in phytoplankton composition, relating its behaviour to temperature and conductivity, at El Destino (ED) sampling site in the Salado river lower-basin. A total of 28 phytoplankton samples were taken twice a week from 9/3 to 20/7/2004 and were analysed according to Utermöhl method. In total, 145 algae taxa were identified, although rare species were discarded in order to avoid statistical misinterpretation. Correlation coefficients and autocorrelation analyses (Q-Ljung-Box statistic) were performed in order to establish seasonal patterns of species abundance. Significant autocorrelations (p <0.05) were observed between phytoplankton species and temperature-conductivity patterns, thus illustrating their seasonal behaviour. Moreover, taxa were grouped according to their occurrence during different water temperature periods: (1) a ‘summer’ group, included 41 species that were well represented during warm-waters (>22ºC) like Planctonema lauterbornii, Chondrocystis dermochroa, Geminella interrupta, Chrooccocus spp., Merismopedia spp., among others; (2) a ‘winter’ group, which included 10 species whose highest densities were reached during the cold-waters period (<12ºC) for e.g. Binuclearia sp, Nitzschia fruticosa, Schroederia indica, Microcystis firma; (3) a ‘transitional’ group, of only 4 species with abundance peaks during ‘intermediate’ conditions (15.5ºC average) with Closteriopsis acicularis and Nodularia spumigena being the most remarkable; and (4) an ‘indifferent’ group, with 29 species of random behaviour whose autocorrelations remain within confidence limits, like Thorakochloris nygaardii, Pseudoanabaena limnetica, Monoraphidium giffithii, Scenedesmus linearis, etc. An evident seasonal succession was detected, having species substitution from summer warm-stagnant adapted species to cold-waters favoured ones, hence indicating different successional stages.
format Articulo
Articulo
author Bazzuri, María Elisa
Gabellone, Néstor Adrián
Solari, Lía Cristina
author_facet Bazzuri, María Elisa
Gabellone, Néstor Adrián
Solari, Lía Cristina
author_sort Bazzuri, María Elisa
title Variación estacional del fitoplancton en la cuenca inferior del Río Salado (provincia de Buenos Aires)
title_short Variación estacional del fitoplancton en la cuenca inferior del Río Salado (provincia de Buenos Aires)
title_full Variación estacional del fitoplancton en la cuenca inferior del Río Salado (provincia de Buenos Aires)
title_fullStr Variación estacional del fitoplancton en la cuenca inferior del Río Salado (provincia de Buenos Aires)
title_full_unstemmed Variación estacional del fitoplancton en la cuenca inferior del Río Salado (provincia de Buenos Aires)
title_sort variación estacional del fitoplancton en la cuenca inferior del río salado (provincia de buenos aires)
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/67853
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