Eutrophic Environments
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Phytoplankton, Trophic State and Ecological Potential in reservoirs in the State of São Paulo, Brazil
Resumo O objetivo deste trabalho foi estabelecer Potencial Ecológico de alguns reservatórios do estado de São Paulo, tendo como elemento de qualidade biológica o fitoplâncton. Amostras de água integrando a coluna d’água foram tomadas nas zonas lótica, central e de barragem dos reservatórios Igaratá, Atibainha, Paiva Castro, Rio Grande, Itupararan
Rev. Ambient. Água. Publicado em: 10/10/2019
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2. Analysis of cloud condition on Sentinel-2 MSI and Landsat-8 OLI images of a public supply lake in Belém-Pará-Brazil
Resumo O processo de eutrofização leva à redução da qualidade da água e a perdas econômicas no mundo todo. Além disso, é possível aplicar técnicas de sensoriamento remoto para o monitoramento de ambientes aquáticos. Neste estudo, objetivou-se analisar o uso combinado dos dados Sentinel-2 Multispectral Instrument e Landsat-8 Operational Land Image
Rev. Ambient. Água. Publicado em: 15/07/2019
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3. Phosphate Adsorption by Montmorillonites Modified with Lanthanum/Iron and a Laboratory Test using Water from the Jacarepaguá Lagoon (RJ, Brazil)
Montmorillonites modified with lanthanum(III) and iron(III) were prepared from two commercial clays. These materials were characterized by powder X-ray diffraction analysis, X-ray fluorescence, infrared spectroscopy, N2 adsorption, and scanning electron microscopy. The incorporation of lanthanum(III) and iron(III) varied from 0 to 4.00%. The amount of these
J. Braz. Chem. Soc.. Publicado em: 2019-03
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4. Alpha and beta diversity of phytoplankton in two subtropical eutrophic streams in southern Brazil
This paper reports the alpha and beta diversity of phytoplankton communities of two streams differing in land use. We analyzed which environmental conditions affect diversity of the phytoplankton communities and tested the hypothesis that stream stretches protected by forests will have lower species richness, whereas higher beta-diversity would occur among t
Acta Bot. Bras.. Publicado em: 2015-12
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5. Nutrient enrichment effect on macroinvertebrates in a lowland stream of Argentina
ABSTRACT One of the most important effects derived from the intensive land use is the increase of nutrient concentration in the aquatic systems due to superficial drainage. Besides, the increment of precipitations in South America connected to the global climate change could intensify these anthropic impacts due to the changes in the runoff pattern and a gre
Iheringia, Sér. Zool.. Publicado em: 2015-06
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6. Immature mosquitoes (Diptera: Culicidae) in a eutrophic landfill tank from State of Rio de Janeiro, Brazil
Introduction To determine the faunal composition of immature culicids inhabiting a percolation tank in the landfill of Sapucaia, State of Rio de Janeiro, Brazil, immature mosquitoes were collected over a two-day period during the third weeks of April, August and October 2011. Results The species found were Culex usquatus, Lutzia bigoti, Anopheles argyrita
Rev. Soc. Bras. Med. Trop.. Publicado em: 2013-12
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7. Gradientes edáficos e sua relação com as fitofisionomias do semi-árido meridional brasileiro / Edaphic gradients and their relationship with the vegetation types of semi-arid southern Brazil
The semi-arid region in Brazil represents a significant territorial extension, where the climate is markedly seasonal, with low rainfall, high evapotranspiration and higher temperatures. Its southern portion comprises the northern boundary between the states of Minas Gerais and Bahia. This region is dominated by dry forest vegetation type, however, different
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
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8. Morphometric study of a Brazilian strain of Carchesium polypinum (Ciliophora: Peritrichia) attached to Pomacea figulina (Mollusca: Gastropoda), with notes on a high infestation
During an ecological study of the epibiotic relationship between ciliate protists and Pomacea figulina (Spix, 1827) (Gastropoda, Ampullariidae), originating from an urban stream in southeast Brazil, a high infestation by the peritrich ciliate Carchesium polypinum (Linnaeus, 1758) Ehrenberg, 1830 (Ciliophora, Peritrichia) associated to the shell of one mollus
Zoologia (Curitiba). Publicado em: 2010-06
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9. Transformações na matéria orgânica nos sedimentos e águas eutrofizados da Represa Ibirité (Ibirité-Sarzedo, MG) tratados com nitrato de cálcio em microcosmos
Due to the growing concern with the environment and the welfare of future generations the search for the restoration of degraded areas and the reestablishment of equilibrium between the anthropogenic and natural environments are nowadays highlighted. The Ibirité Reservoir (Ibirité-Sarzedo, MG) is an example of water body impacted by the disorganized urbani
Publicado em: 2010
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10. Usos e qualidade da água em região semi-árida do nordeste brasileiro: percepção ambiental de professores e alunos
Density and biomass of bacterioplankton in parts of the Marechal Dutra reservoir were studied in periods of dry and rainy season. The averages of the total bacterial densities oscillated in the order of 107 organisms/ mL of sample. The cocci cells were numerically predominant, influencing considerably the total abundance of the bacterioplankton. The total ba
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/04/2009
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11. Comparative analisys of the distribution of familier Salpidae and Doliolidae in relation to total zooplankton on the southeastern continental shelf of Brazil by means of semi-automatic techniques of identification and enumeration / Análise comparativa da distribuição das famílias Salpidae e Doliolidae em relação ao zooplâncton total na plataforma continental sudeste do Brasil por meio de técnicas semi-automáticas de identificação e contagem
The abundance of thaliaceans and its relation to other zooplankton groups, as well as salp grazing impact, were studied on the southeastern shelf of Brazil based on samples collected during summer 2002. Salps occurred at higher numbers on the inner shelf, while doliolids were more abundant on the outer shelf. Both taxa were found mainly in the upper layers o
Publicado em: 2009
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12. Qualidade de água como tema para a socialização do conhecimento científico em região semi-árida brasileira
During the dry and rainy periods, in the Piranhas-Assu river hydrographic basin, variations in bacterioplankton and trophic state indexes were studied in the lotic and lentic environments. The means of total bacterial density wavered in the order of 107 organisms. mL-1 and they were higher in the rainy period. Cocci bacteria were numerically predominant in a
Publicado em: 2008