Results 41 to 49 of about 238 (49)

O nitrogênio e fósforo como fatores limitantes ao desenvolvimento de algas cianofíceas na Represa Billings [PDF]

Revista DAE, 1985
O fenômeno da eutrofização das águas em reservatórios oferecem aspectos vantajosos e desvantajosos, dependendo sobre tudo da utilização que se pretende fazer da represa considerada.
Aristides Almeida Rocha, Samuel Murgel Branco   +1 more
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Epilithic diatoms in headwater areas of the hydrographical sub-basin of the Andreas Stream, RS, Brazil, and their relation with eutrophication processes

Acta Limnologica Brasiliensia, 2014
AIM: This research aimed to study the composition of epilithic diatom flora in headwater areas of the sub-basin of the Andreas stream, RS, Brazil, and their relation with eutrophication processes.
Carla Giselda Heinrich, Valéria Louzada Leal, Marilia Schuch Adriana Düpont, Eduardo Alcayaga Lobo   +3 more
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Water quality in four reservoirs of the metropolitan region of São Paulo, Brazil

Acta Limnologica Brasiliensia, 2015
Aim: This paper describes some limnological variables of four reservoirs with different trophic status (Billings, Guarapiranga, Jundiaí and Paiva Castro) of the Metropolitan Region of São Paulo, Brazil, aiming to characterize the water quality in these ...
Denise Amazonas Pires, Andrea Tucci, Maria do Carmo Carvalho, Marta Condé Lamparelli   +3 more
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Erosão hídrica e perda de sedimento, água e nutrientes durante eventos pluviais em duas bacias hidrográficas rurais

Investigación Agraria, 2014
As atividades agrícolas geram impactos sobre o ambiente e necessitam de constante estudo e monitoramento para melhorar o entendimento das formas e grau de contaminação.
Jimmy Walter Rasche Alvarez, André Pellegrini, Márcia Luciane Kochem, Gilmar Luiz Schaefer, Viviane Capoane, Tales Tiecher, Mayara Regina Fornari, Danilo Rheinheimer dos Santos   +7 more
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Effects of food web structure and resource subsidies on the patterns and mechanisms of temporal coherence in a tropical coastal lagoon: an experimental mesocosm approach

Acta Limnologica Brasiliensia
AIM: The study of the patterns and mechanisms of temporal coherence of ecological variables among lakes has become an important area of limnology.
Luciana Silva Carneiro, Adriano Caliman, Rafael Dettogni Guariento, Adriana de Melo Rocha, Leticia Barbosa Quesado, Ellen da Silva Fonte, Jayme Magalhães Santangelo, João José Fonseca Leal, Paloma Marinho Lopes, Frederico Meirelles-Pereira, Francisco de Assis Esteves, Reinaldo Luiz Bozelli   +11 more
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Zooplankton assemblages in eutrophic reservoirs of the Brazilian semi-arid Assembléias zooplanctônicas em reservatórios eutróficos do semiárido brasileiro

Brazilian Journal of Biology, 2013
Species composition, density, and temporal dynamics of zooplankton were studied in six reservoirs in a semi-arid region in tropical northeastern Brazil (Rio Grande do Norte state).
EM. Eskinazi-Sant'Anna, R. Menezes, IS. Costa, M. Araújo, R. Panosso, JL. Attayde   +5 more
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Simulação da eutrofização do Lago Paranoá [PDF]

Revista DAE, 1985
Alice Pereira
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Correlation between Escherichia coli and limnological variables in water samples of the Lagoa da Maraponga, Fortaleza, Ceará State, Brazil = Correlação entre Escherichia coli e variáveis limnológicas em amostras de água da Lagoa da Maraponga, Fortaleza, Estado do Ceará, Brasil

Acta Scientiarum: Biological Sciences, 2011
The present work examined possible relationship between the Escherichia coli counts and the concentrations of free CO2, dissolved oxygen, reactive phosphorus, total ammonia, nitrite, pH, transparency and electric conductivity in water samples from the ...
Vitor Matheus Galdino Pereira, Raimundo Bemvindo Gomes, Marcelo Vinícius do Carmo e Sá   +2 more
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Characterization of effluents from bullfrog (Lithobates catesbeianus, Shaw, 1802) grow-out ponds Caracterização de efluentes de viveiros de engorda de rã-touro (Lithobates catesbeianus, Shaw, 1802)

Acta Limnologica Brasiliensia, 2012
AIM: Current analysis characterizes the effluent from bullfrog-rearing ponds during the grow-out phase; METHODS: Temperature, pH, dissolved oxygen, electric conductivity, turbidity, total phosphorus, N-NH3, N-NO3, BOD5 and COD and the number of ...
Fernanda de Freitas Borges, Luiz Augusto do Amaral, Marta Verardino De Stéfani   +2 more
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