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| Dantas,Ênio Wocyli; Moura,Ariadne do Nascimento; Bittencourt-Oliveira,Maria do Carmo; Arruda Neto,João Dias de Toledo; Cavalcanti,Airlton de Deus C.. |
| The aim of this study was to determine how abiotic factors drive the phytoplankton community in a water supply reservoir within short sampling intervals. Samples were collected at the subsurface (0.1 m) and bottom of limnetic (8 m) and littoral (2 m) zones in both the dry and rainy seasons. The following abiotic variables were analyzed: water temperature, dissolved oxygen, electrical conductivity, total dissolved solids, turbidity, pH, total nitrogen, nitrite, nitrate, total phosphorus, total dissolved phosphorus and orthophosphate. Phytoplankton biomass was determined from biovolume values. The role abiotic variables play in the dynamics of phytoplankton species was determined by means of Canonical Correspondence Analysis. Algae biomass ranged from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cylindrospermopsis raciborskii; Eutrophication; Nutrients; Water supply reservoir. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062008000400008 |
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| Cylindrospermopsis raciborskii (Woloszyn´ ska) Seenayya et Subba Raju 1972 es una especie capaz de generar diversas toxinas que impactan negativamente sobre la calidad del agua destinada al consumo humano así como a otros usos de la misma. Cepas del hemisferio norte producen la hepatotoxina cilindrospermopsina, mientras que las sudamericanas generan las toxinas neurotóxicas saxitoxinas. No se ha reportado hasta el momento la producción de microcistinas por parte de esta especie El objetivo del presente estudio fue analizar la presencia de microcistinas en el agua del Arroyo Yatay en Corrientes, Argentina, y de cilindrospermopsina, saxitoxinas y microcistinas en cepas de C. raciborskii aisladas del mismo, mediante el ensayo por Inmuno Absorción Ligado a... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Cultivo de algas; Cylindrospermopsis raciborskii; Microcistinas; Toxinas. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432014000300006 |
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| Lira,Giulliari A. S. T.; Araújo,Elcida L.; Bittencourt-Oliveira,Maria Do Carmo; Moura,Ariadne N.. |
| The present study reports the phytoplankton abundance, dominance and co-existence relationships in the eutrophic Carpina reservoir, Pernambuco, Brazil. Sampling was carried out at six different depths bimonthly at a single reservoir spanning two climatic periods: dry season (January, September, and November 2006) and rainy season (March, May, and July 2006). Density, abundance, dominance, specific diversity and equitability of the community were determined, along with chlorophyll a, and physical and chemical variables of the environment. Eight species were considered abundant, and their densities corresponded to more than 90% of the total phytoplankton community quantified. Cyanobacteria represented more than 80% of this density. Cylindrospermopsis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carpina reservoir; Cylindrospermopsis raciborskii; Cyanobacteria; Limnological characteristics; Phytoplankton structure; Vertical distribution. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400018 |
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| Dantas,Ênio W.; Moura,Ariadne N.; Bittencourt-Oliveira,Maria do Carmo. |
| This study investigated the dynamics of cyanobacteria in two deep, eutrophic reservoirs in a semi-arid region of Brazil during periods of stratification and destratification. Four collections were carried out at each reservoir at two depths at three-month intervals. The following abiotic variables were analyzed: water temperature, dissolved oxygen, pH, turbidity, water transparency, total phosphorus, total dissolved phosphorus, orthophosphate and total nitrogen. Phytoplankton density was quantified for the determination of the biomass of cyanobacteria. The data were analyzed using CCA. Higher mean phytoplankton biomass values (29.8 mm³.L-1) occurred in the period of thermal stratification. A greater similarity in the phytoplankton communities also occurred... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Cylindrospermopsis raciborskii; Seasonal dynaics; Theral pattern. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400019 |
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