Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532

Detalhes bibliográficos
Autor(a) principal: Lansac-Tôha, Fabio Amodeo
Data de Publicação: 2008
Outros Autores: Velho, Luiz Felipe Machado, Perenha, Maysa Cláudia Zolin, Pereira, Danielle Goeldner, Santos, Valentina Delise dos
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta Scientiarum Biological Sciences
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1532
Resumo: The present study aimed to investigate the spatial and temporal distribution patterns of density and biomass of the planktonic ciliates, in a reservoir serie of the Paranapanema River (22o 18’ - 23o 35’ S; 49o 30’ - 52o 50’ W). We intend to test the hypothesis that, along reservoirs serie, there is a decrease of abundance from river towards the dam. Samplings were carried out in seven reservoirs, during 2001, in two distinct hydrological periods, at subsurface of the lacustrine region, using a Van Dorn bottle (5 liters). Aliquots from one liter were obtained and fixed with a fixing solution compounded by alkaline lugol, formaldehyde and sodium tiosulfate. Obtained values for ciliates abundance (density and biomass) in different reservoirs (0.4 to 16.6 cells.mL-1; 0.23 to 20.7 &micro;g.C.L-1, respectively) were inferior to results found in eutrophic environments, but similar to those registered in oligo-mesotrophic environments. Analysis of the abundance distribution results, along reservoirs serie, did not corroborate the hypothesis of decreasing density and biomass from upstream to dowstream, due to an expectancy of a possible oligotrophication downriver. In relation to different functional groups of ciliates, it was verified the dominance of Oligotrichida, mainly small sized individuals (< 30 &micro;m).
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spelling Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532Abundância de ciliados planctônicos em reservatórios em cascata do rio Paranapanema, Brasil- DOI: 10.4025/actascibiolsci.v26i4.1532protozoáriosciliadosabundânciaplânctonreservatórios em cascata2.01.00.00-0 Biologia GeralThe present study aimed to investigate the spatial and temporal distribution patterns of density and biomass of the planktonic ciliates, in a reservoir serie of the Paranapanema River (22o 18’ - 23o 35’ S; 49o 30’ - 52o 50’ W). We intend to test the hypothesis that, along reservoirs serie, there is a decrease of abundance from river towards the dam. Samplings were carried out in seven reservoirs, during 2001, in two distinct hydrological periods, at subsurface of the lacustrine region, using a Van Dorn bottle (5 liters). Aliquots from one liter were obtained and fixed with a fixing solution compounded by alkaline lugol, formaldehyde and sodium tiosulfate. Obtained values for ciliates abundance (density and biomass) in different reservoirs (0.4 to 16.6 cells.mL-1; 0.23 to 20.7 &micro;g.C.L-1, respectively) were inferior to results found in eutrophic environments, but similar to those registered in oligo-mesotrophic environments. Analysis of the abundance distribution results, along reservoirs serie, did not corroborate the hypothesis of decreasing density and biomass from upstream to dowstream, due to an expectancy of a possible oligotrophication downriver. In relation to different functional groups of ciliates, it was verified the dominance of Oligotrichida, mainly small sized individuals (< 30 &micro;m).O presente estudo teve como objetivo investigar os padrões de distribuição espacial e temporal da densidade e biomassa dos ciliados planctônicos em reservatórios em cascata do rio Paranapanema (22o 18’ - 23o 35’ S; 49o 30’ - 52o 50’ W). Pretende-se testar a hipótese de que, ao longo da série de reservatórios, observa-se um decréscimo da abundância desses organismos no sentido montante-jusante. Para tal, foram coletadas amostras em sete reservatórios, no ano de 2001, em dois períodos hidrológicos distintos, à sub-superfície da região lacustre, com o auxílio de uma garrafa de Van Dorn de 5 litros. Alíquotas de um litro foram obtidas e sua fixação realizada com solução fixadora composta de lugol alcalino, formol e tiossulfeto de sódio. Os valores obtidos para a abundância (densidade e biomassa) de ciliados nos diferentes reservatórios (0,4 a 16,6 células.mL-1; 0,23 a 20,7 &micro;g.C.L-1, respectivamente) foram inferiores aos resultados encontrados em ambientes eutróficos, porém similares àqueles registrados em ambientes oligo-mesotróficos. A análise dos resultados de distribuição da abundância ao longo da série de reservatórios não corroborou a hipótese preconizada de uma diminuição de densidade e biomassa no sentido montante-jusante, em função da expectativa de uma possível oligotrofização rio abaixo. Em relação aos diferentes grupos funcionais de ciliados, foi constatada a dominância dos Oligotrichida, principalmente os de menor porte (< 30 &micro;m).Universidade Estadual De Maringá2008-03-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/153210.4025/actascibiolsci.v26i4.1532Acta Scientiarum. Biological Sciences; Vol 26 No 4 (2004); 407-413Acta Scientiarum. Biological Sciences; v. 26 n. 4 (2004); 407-4131807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1532/948Lansac-Tôha, Fabio AmodeoVelho, Luiz Felipe MachadoPerenha, Maysa Cláudia ZolinPereira, Danielle GoeldnerSantos, Valentina Delise dosinfo:eu-repo/semantics/openAccess2022-11-23T17:33:12Zoai:periodicos.uem.br/ojs:article/1532Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-11-23T17:33:12Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532
Abundância de ciliados planctônicos em reservatórios em cascata do rio Paranapanema, Brasil- DOI: 10.4025/actascibiolsci.v26i4.1532
title Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532
spellingShingle Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532
Lansac-Tôha, Fabio Amodeo
protozoários
ciliados
abundância
plâncton
reservatórios em cascata
2.01.00.00-0 Biologia Geral
title_short Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532
title_full Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532
title_fullStr Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532
title_full_unstemmed Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532
title_sort Abundance of planktonic ciliates in a cascading reservoirs of the Paranapanema River, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1532
author Lansac-Tôha, Fabio Amodeo
author_facet Lansac-Tôha, Fabio Amodeo
Velho, Luiz Felipe Machado
Perenha, Maysa Cláudia Zolin
Pereira, Danielle Goeldner
Santos, Valentina Delise dos
author_role author
author2 Velho, Luiz Felipe Machado
Perenha, Maysa Cláudia Zolin
Pereira, Danielle Goeldner
Santos, Valentina Delise dos
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Lansac-Tôha, Fabio Amodeo
Velho, Luiz Felipe Machado
Perenha, Maysa Cláudia Zolin
Pereira, Danielle Goeldner
Santos, Valentina Delise dos
dc.subject.por.fl_str_mv protozoários
ciliados
abundância
plâncton
reservatórios em cascata
2.01.00.00-0 Biologia Geral
topic protozoários
ciliados
abundância
plâncton
reservatórios em cascata
2.01.00.00-0 Biologia Geral
description The present study aimed to investigate the spatial and temporal distribution patterns of density and biomass of the planktonic ciliates, in a reservoir serie of the Paranapanema River (22o 18’ - 23o 35’ S; 49o 30’ - 52o 50’ W). We intend to test the hypothesis that, along reservoirs serie, there is a decrease of abundance from river towards the dam. Samplings were carried out in seven reservoirs, during 2001, in two distinct hydrological periods, at subsurface of the lacustrine region, using a Van Dorn bottle (5 liters). Aliquots from one liter were obtained and fixed with a fixing solution compounded by alkaline lugol, formaldehyde and sodium tiosulfate. Obtained values for ciliates abundance (density and biomass) in different reservoirs (0.4 to 16.6 cells.mL-1; 0.23 to 20.7 &micro;g.C.L-1, respectively) were inferior to results found in eutrophic environments, but similar to those registered in oligo-mesotrophic environments. Analysis of the abundance distribution results, along reservoirs serie, did not corroborate the hypothesis of decreasing density and biomass from upstream to dowstream, due to an expectancy of a possible oligotrophication downriver. In relation to different functional groups of ciliates, it was verified the dominance of Oligotrichida, mainly small sized individuals (< 30 &micro;m).
publishDate 2008
dc.date.none.fl_str_mv 2008-03-31
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1532
10.4025/actascibiolsci.v26i4.1532
url http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1532
identifier_str_mv 10.4025/actascibiolsci.v26i4.1532
dc.language.iso.fl_str_mv por
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dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1532/948
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Biological Sciences; Vol 26 No 4 (2004); 407-413
Acta Scientiarum. Biological Sciences; v. 26 n. 4 (2004); 407-413
1807-863X
1679-9283
reponame:Acta Scientiarum Biological Sciences
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta Scientiarum Biological Sciences
collection Acta Scientiarum Biological Sciences
repository.name.fl_str_mv Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv ||actabiol@uem.br
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