Cambios en la diversidad y variación interanual de la abundancia del zooplancton de un lago somero urbano de La Pampa

Don Tomás is an urban, turbid and hypereutrophic shallow lake located in the west side of Santa Rosa. As it has an important silverside population (Odontesthes bonariensis) this lake is important for recreational and touristic activities. As many changes in many limnological parameters were observed...

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Detalles Bibliográficos
Autores principales: Echaniz, Santiago Andrés, Vignatti, Alicia, Pilati, A., Kissner, S.
Formato: Articulo
Lenguaje:Español
Publicado: 2012
Materias:
Ciencias Naturales
lagos someros
Zooplancton
cladóceros
rotíferos
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/68942
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-68942
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
lagos someros
Zooplancton
cladóceros
rotíferos
spellingShingle Ciencias Naturales
lagos someros
Zooplancton
cladóceros
rotíferos
Echaniz, Santiago Andrés
Vignatti, Alicia
Pilati, A.
Kissner, S.
Cambios en la diversidad y variación interanual de la abundancia del zooplancton de un lago somero urbano de La Pampa
topic_facet Ciencias Naturales
lagos someros
Zooplancton
cladóceros
rotíferos
description Don Tomás is an urban, turbid and hypereutrophic shallow lake located in the west side of Santa Rosa. As it has an important silverside population (Odontesthes bonariensis) this lake is important for recreational and touristic activities. As many changes in many limnological parameters were observed, including zooplankton composition and abundance between 1995-96 and 2006, the main objective of this research was to compare these parameters with the ones obtained from September 2008 to August 2009. Salinity decreased along the three periods from 1.65 (1995-96) to 0.65 g.l-1 (2008-09) mainly due to the city runoff and the constant water pumping for irrigation. Water transparency also decreased from 0.24 (1995-96) to 0.14 m (2008-09). Zooplankton total richness did not change, but changes in taxonomical composition were observed when groups were separately analyzed (cladoceran richness decreased and rotifers increased during 2006. Cladoceran richness decreased from 9 species in 1995-96 to 4 in 2006, to only 2 species in 2008-2009. The same pattern was observed with copepod richness which decreased from 4 species in 2006 to only 2 species in 2008-09. Rotifer richness, on the other hand, increased from 8 species (1995-96) to 15 (2008-2009). The decreased water transparency could have been due to the lack of Daphnia (observed only in 1995-96) and the increased dominance of rotifers. Total zooplankton abundance showed important inter-annual differences, being the lowest in 2006. The obtained results reveal the wide variability of zooplankton in this type of environment.
format Articulo
Articulo
author Echaniz, Santiago Andrés
Vignatti, Alicia
Pilati, A.
Kissner, S.
author_facet Echaniz, Santiago Andrés
Vignatti, Alicia
Pilati, A.
Kissner, S.
author_sort Echaniz, Santiago Andrés
title Cambios en la diversidad y variación interanual de la abundancia del zooplancton de un lago somero urbano de La Pampa
title_short Cambios en la diversidad y variación interanual de la abundancia del zooplancton de un lago somero urbano de La Pampa
title_full Cambios en la diversidad y variación interanual de la abundancia del zooplancton de un lago somero urbano de La Pampa
title_fullStr Cambios en la diversidad y variación interanual de la abundancia del zooplancton de un lago somero urbano de La Pampa
title_full_unstemmed Cambios en la diversidad y variación interanual de la abundancia del zooplancton de un lago somero urbano de La Pampa
title_sort cambios en la diversidad y variación interanual de la abundancia del zooplancton de un lago somero urbano de la pampa
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/68942
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