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Registros recuperados: 5
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Abundância de nanoflagelados heterotróficos no plâncton de reservatórios com distintos graus de trofia - DOI: 10.4025/actascibiolsci.v27i1.1358 Biological Sciences
Pereira, Danielle Goeldner; UEM; Velho, Luiz Felipe Machado; UEM; Pagioro, Thomaz Aurélio; UEM; Lansac-Tôha, Fábio Amodêo.
O objetivo deste trabalho foi investigar a influência do grau de trofia sobre a abundância dos nanoflagelados heterotróficos no plâncton de três reservatórios do Estado do Paraná: Iraí (eutrófico), Rosana (mesotrófico) e Chavantes (oligotrófico). As coletas foram realizadas durante os períodos de estiagem (julho) e chuva (novembro) de 2001, à subsuperfície e camada de mistura da região lacustre desses reservatórios. A abundância dos nanoflagelados heterotróficos foi determinada sob microscópio de epifluorescência, utilizando o Dapi como corante, e os volumes celulares calculados objetivando estimar a biomassa, usando um fator de conversão volume celular-carbono. Maiores valores de densidade e biomassa foram observados no reservatório Irai, enquanto que os...
Palavras-chave: 2.01.00.00-0 Biologia Geral protozooplâncton; Nanoflagelados heterotróficos; Grau de trofia; Reservatórios; Região tropical 2.01.00.00-0 Biologia Geral.
Ano: 2005 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1358
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Flagellate protist abundance in phytotelmata of Aechmea distichantha Lem. (Bromeliaceae) in the upper Paraná river basin - doi: 10.4025/actascibiolsci.v35i4.17134 Biological Sciences
Duarte, Gisele Silva Costa; Alves, Geziele Mucio; Lansac-Tôha, Fernando Miranda; Velho, Luiz Felipe Machado; Lansac-Tôha, Fábio Amodêo.
In some Bromeliaceae species the leaf sheaths form a tank or phytotelma, accumulating water and organic detritus, conditions that allow the establishment of different communities. Thus, this study evaluated the relationship between diameter and volume of water in the tank of the bromeliad Aechmea distichantha Lem. and density of flagellates found in the phytotelmata, as well as the influence of the hydrological periods and proximity of sampled strata on the phytotelma patterns of abundance distribution. Samplings were conducted in two hydrological periods in 2010. In each sampling, four plants were collected from three different strata, classified according to the distance from the river level. A one-way ANOVA identified significant differences in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecologia/Ecologia de Ecossistemas Phytotelma; Protozoa; Bromeliad; Rocky walls Ecologia de Protoplâncton.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17134
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Geographical spread of the invasive species Kellicottia longispina (Kellicott, 1879) and K. bostoniensis (Rousselet, 1908): A scientometric approach Biological Sciences
Bomfim, Francieli de Fátima; Mantovano, Tatiane; Schwind, Leilane Talita Fatoreto; Palazzo, Fabiana; Bonecker, Claudia Costa; Lansac-Tôha, Fábio Amodêo.
Processes related to biological invasion of inland waters have become a major issue due to the increasing number of cases associated with the potential effects of invasions. Kellicottia bostoniensis and K. longispina are rotifer species originating from North America and have become invasive in several continents. In this sense, this study carried out a scientometric analysis to analyze the geographical distribution and identify patterns of occurrence as well as to fill gaps on the knowledge of these species. The survey was based on articles indexed in databases from 1896 to 2014. There is a greater scientific knowledge of these species in the temperate region, and these are present in many different environments. In Brazil, there is a very small number of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecologia de Ambientes Aquáticos; Ecologia de Zooplâncton; Ecologia de rotíferos Rotifera; Zooplankton; Dispersal potential; Time trend Ecologia.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28252
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Rotifer community structure along a stretch under the influence of dams in the Upper Paraná River floodplain Biological Sciences
Mantovano, Tatiane; Arrieira, Rodrigo Leite; Schwind, Leilane Talita Fatoreto; Bonecker, Claudia Costa; Lansac-Tôha, Fábio Amodêo.
The construction of reservoirs imposes substantial impact on freshwater ecosystems and changes the ecological aspects of the lotic system downstream of dams. We hypothesized an increasing dissimilarity between communities in the sampling sites according to increasing distance from the Porto Primavera Dam. In addition, we expect that the rotifer community in the last sampling site will be influenced more by environmental variables related to trophic status. Samplings were conducted under the water surface of ten sites on the Paraná River in August 2013. Environmental variables were also determined. The highest number of taxa belonged to families Brachionidae, Lecanidae and Trichocercidae. The most abundant species was observed to Synchaeta oblonga,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecologia; Comunidades aquáticas; Ecologia de comunidades rotifer; Trophic status; Composition; Longitudinal distribution Ecologia.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/27759
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Structure of planktonic ciliates community (Protist, Ciliophora) from an urban lake of southern Brazil - doi: 10.4025/actascibiolsci.v35i4.18579 Biological Sciences
Velho, Luiz Felipe Machado; Brão, Arianne Francielle Silva; Lansac-Tôha, Fernando Miranda; Buosi, Paulo Roberto Bressan; Meira, Bianca Ramos de; Cabral, Adalgisa Fernanda; Lansac-Tôha, Fábio Amodêo.
This study examined temporal and spatial (vertical) variations of composition, richness and abundance of the planktonic ciliates community in an urban and eutrophic lake, as well as identified the limnological factors involved in determining the patterns observed. To this end, samples of ciliates and measures of limnological variables were taken at different depths and hydrological periods. 35 ciliate species were identified, among which 14 species occurred in all periods and strata, being Prostomatida the most specious, followed by Gymnostomatida, Oligotrichida, Peritrichida, and Scuticociliatida. The patterns found for composition, abundance and species richness evidenced a vertical and temporal variation of these attributes. However, in general the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecologia - Limnologia / Ecologia de comunidades Protist; Density; Species compositio; Richness; Plankton Ecologia de Protoplâncton.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/18579
Registros recuperados: 5
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