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| 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... |
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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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| 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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| 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 |
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