Distribución horizontal y vertical del zooplancton en un ciclo diario en el litoral de una laguna pampásica

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The vertical and horizontal distributions of zooplankton were investigated in the littoral zone of the San Miguel del Monte Lake (Buenos Aires, Argentina) in five occasions with a diel time scale (24 h) in summer. Sixty zooplankton species were recorded. The measured parameters (conductivity, tempe...

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Autores principales: Benítez, Hernán Hugo, Claps, María Cristina
Formato: Articulo
Lenguaje:Español
Publicado: 2009
Materias:
Ciencias Naturales
Buenos Aires (Argentina)
Zooplancton
distribución espacio-temporal
Laguna Litoral
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/68061
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-68061
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
Buenos Aires (Argentina)
Zooplancton
distribución espacio-temporal
Laguna Litoral
spellingShingle Ciencias Naturales
Buenos Aires (Argentina)
Zooplancton
distribución espacio-temporal
Laguna Litoral
Benítez, Hernán Hugo
Claps, María Cristina
Distribución horizontal y vertical del zooplancton en un ciclo diario en el litoral de una laguna pampásica
topic_facet Ciencias Naturales
Buenos Aires (Argentina)
Zooplancton
distribución espacio-temporal
Laguna Litoral
description The vertical and horizontal distributions of zooplankton were investigated in the littoral zone of the San Miguel del Monte Lake (Buenos Aires, Argentina) in five occasions with a diel time scale (24 h) in summer. Sixty zooplankton species were recorded. The measured parameters (conductivity, temperature, dissolved oxygen, pH) showed minimal differences among the sampling occasions. Statistically significant horizontal and vertical zooplankton abundance gradients occurred. The majority of the smallbodied zooplankton (ciliates and rotifers) did not show a significant change in the horizontal or vertical distribution. Only Tintinidium fuviatile and Keratella tropica showed a significant avoidance of the surface during midnight, whereas in the same time Keratella americana showed significant aggregating in the littoral sector more distant to the edge. The spatial distribution of large-bodied zooplankton varied according diel scale. The cladocerans (Bosmina huaronensis and Diaphanosoma birgei) exhibited significant changes in horizontal position with the greatest avoidance of shore during midnight. The copepods (Notodiaptomus incompositus and Metacyclops mendocinus) showed a pronounced diel vertical differentiation, and were more abundant at surface at sunset and midnight. The high inorganic turbidity recorded (transparency: 0.35 m) could reduce the risk of predation and for this reason some zooplankters exhibit limited changes of their spatial distribution during the diel cycle.
format Articulo
Articulo
author Benítez, Hernán Hugo
Claps, María Cristina
author_facet Benítez, Hernán Hugo
Claps, María Cristina
author_sort Benítez, Hernán Hugo
title Distribución horizontal y vertical del zooplancton en un ciclo diario en el litoral de una laguna pampásica
title_short Distribución horizontal y vertical del zooplancton en un ciclo diario en el litoral de una laguna pampásica
title_full Distribución horizontal y vertical del zooplancton en un ciclo diario en el litoral de una laguna pampásica
title_fullStr Distribución horizontal y vertical del zooplancton en un ciclo diario en el litoral de una laguna pampásica
title_full_unstemmed Distribución horizontal y vertical del zooplancton en un ciclo diario en el litoral de una laguna pampásica
title_sort distribución horizontal y vertical del zooplancton en un ciclo diario en el litoral de una laguna pampásica
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/68061
work_keys_str_mv AT benitezhernanhugo distribucionhorizontalyverticaldelzooplanctonenunciclodiarioenellitoraldeunalagunapampasica
AT clapsmariacristina distribucionhorizontalyverticaldelzooplanctonenunciclodiarioenellitoraldeunalagunapampasica
bdutipo_str Repositorios
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