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	Provedor de dados BABT (2) Acta Botanica (1) Autor Petrucio,Mauricio Mello (3) Barbosa,Francisco Antônio R. (1) Barbosa,Francisco Antônio Rodrigues (1) Brentano,Débora Monteiro (1) Hennemann,Mariana Coutinho (1) Medeiros,Adriana Oliveira (1) Rosa,Carlos Augusto (1) Thomaz,Sidinei Magela (1) Tonetta,Denise (1) Mais... Palavra-chave Phytoplankton (2) Rivers (2) Trophic state (2) Bacterioplankton (1) Carbon (1) Cyanobacteria (1) Cyanotoxins (1) Freshwater (1) Microorganisms (1) Nutrients (1) Peri Lake (1) Phosphorus (1) Plasticity (1) Subtropical (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Info:eu-repo/semantics/other (1) Ano 2015 (1) 2005 (2) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Considerations regarding the dominance of Cylindrospermopsis raciborskii under low light availability in a low phosphorus lake Acta Botanica Tonetta,Denise; Hennemann,Mariana Coutinho; Brentano,Débora Monteiro; Petrucio,Mauricio Mello. ABSTRACTAlthough many studies have shown that the dispersion, increased abundance and dominance of cyanobacteria can be attributed to nutrient enrichment, we discuss features contributing to the dominance of Cylindrospermopsis raciborskii in a shallow, polymictic, subtropical coastal lake with low phosphorus and light limitation (Peri Lake). The presence and dominance of C. raciborskii in an environment with such characteristics emphasizes the idea that nutrients alone do not explain the high density of this cyanobacterium. Other features should be considered in explaining this species dominance, such as phosphorus storage and physiological flexibilitywhich seem to be key features to high densities in low phosphorus systems. Tipo: Info:eu-repo/semantics/other Palavras-chave: Cyanobacteria; Cyanotoxins; Freshwater; Nutrients; Peri Lake; Phytoplankton; Plasticity; Subtropical. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300448 Trophic state and microorganisms community of major sub-basins of the middle Rio Doce basin, southeast Brazil BABT Petrucio,Mauricio Mello; Medeiros,Adriana Oliveira; Rosa,Carlos Augusto; Barbosa,Francisco Antônio Rodrigues. Total phosphorus concentration was used to define the trophic state of the main sub-basins of the middle Rio Doce, in Minas Gerais State (southeast Brazil) and physical, chemical, and microbiological variables of water were analyzed during 2000 to 2001. The study evaluated changes in water quality caused by seasonality and human activities. Water temperature, conductivity, pH, total alkalinity, dissolved oxygen, and concentrations of NH4-N, NO2-N, NO3-N, total-N, PO4-P, total-P, DOC, and chlorophyll-a were measured in seven rivers stretches (sampling stations). Total yeasts, faecal and total coliforms, and heterotrophic bacteria were also determined. The studied areas were considered to be under oligotrophic to eutrophic conditions. The variables that... Tipo: Info:eu-repo/semantics/article Palavras-chave: Microorganisms; Phosphorus; Rivers; Trophic state. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500015 Bacteria and phytoplankton production rates in eight river stretches of the middle Rio Doce hidrographic basin (southeast Brazil) BABT Petrucio,Mauricio Mello; Barbosa,Francisco Antônio R.; Thomaz,Sidinei Magela. Measurements of bacterial secondary production (BSP), together with primary phytoplanktonic production (PPP) were conducted during dry and rainy seasons, in eight rivers of different orders submitted to different degrees of human impacts (different trophic degree). We aimed to determine and compare the importance of BSP and PPP in carbon fixation in these different lotic ecosystems. Our results showed that the Ipanema River was the most modified system by anthropogenic effluents inputs. These inputs altered the trophic degree and BSP rates of these streams and rivers. Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterioplankton; Carbon; Phytoplankton; Rivers; Trophic state. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000300019 Registros recuperados: 3 Primeira ... 1 ... Última

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