High Rio Negro Basin
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Distribuição dos depósitos de argilas cauliníticas brancas associadas à sistemas pedológicos Latossolo/Espodossolo na região amazônica: análise de imagens orbitais e estudos de campo / White kaolinitic clay deposits distribution associated with the Oxisol/Spodosol pedologic systems in the Amazon region: field studies and satellite images analysis
O presente trabalho teve como objetivo geral determinar a distribuição espacial de depósitos de argilas cauliníticas brancas na região de São Gabriel da Cachoeira, estado do Amazonas, por meio de estudos de campo e análise de imagens orbitais. Foram desenvolvidos estudos em duas escalas distintas. Um de detalhe, com coleta de amostras em uma área de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/09/2011
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2. ESTIMATIVA DA VARIABILIDADE GENÉTICA DA REGIÃO CONTROLE DO DNA MITOCONDRIAL DE Nannostomus eques (CHARACIFORMES, LEBIASINIDAE) DA BACIA DO RIO NEGRO
The middle Negro River Basin is the most important area for ornamental fisheries in the state of Amazonas being that the city of Barcelos is the main trading post. Nannostomus eques (Lebiasinidae: Characiformes), commonly known as pencilfish, is one among the many fish species allowed to be exported as ornamental. This paper presents a study on the genetic v
Publicado em: 2009
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3. ESTRUTURA GENÉTICA DAS POPULAÇÕES DE IRAPUCA (Podocnemis erythrocephala, PODOCNEMIDIDAE) DA AMAZÔNIA BRASILEIRA: IMPLICAÇÕES PARA A CONSERVAÇÃO
The chelonians of the genus Podocnemis are endemics of the Orinoco, Amazon and Araguaia basins, and historically form an important part of the cultural habitats of the local human populations who utilize meat, fat and eggs as sources of food. Podocnemis erythrocephala, also known as irapuca, has a restricted distribution, and occupies only black and clear wa
Publicado em: 2008
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4. ANÁLISE DA VARIABILIDADE GENÉTICA DO PEIXE ORNAMENTAL Carnegiella strigata (CHARACIFORMES, GASTEROPELECIDAE) DE TRÊS RIOS DE ÁGUA PRETA DA AMAZÔNIA CENTRAL
Ornamental fish species of the genus Carnegiella are commonly known as hatchetfish and in particular, Carnegiella strigata is known as the marbled hatchetfish. It is found in Guiana, Suriname, Colombia, Bolivia, Peru and Brazil (Amazon basin) and apparently is limited to black waters rivers. The present study is a preliminary assessment of the genetic variab
Publicado em: 2007
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5. Environmental factors influence evaluation on the structure, dynamics and optical properties of the aquatic humic substances form the "Rio Negro" - Amazonas / Avaliação da influência de fatores ambientais na estrutura, dinâmica e propriedades ópticas das substâncias húmicas aquáticas do Rio Negro
Nowadays, one of the major world concerning is focused in the increasing of the damaging ultraviolet (UV) radiation and its impact on the aquatic ecosystems. In addition, the Rio Negro, one of the principal tributaries of the Amazon Basin, is an appropriate site for studying the influence of the UV radiation in the dissolved organic matter (DOM) biogeochemis
Publicado em: 2007
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6. Quantificação de fluxos de mercúrio gasoso na interface solo/atmosfera utilizando câmara de fluxo dinâmica: aplicação na bacia do Rio Negro
Gaseous mercury sampling conditions were optimized and a dynamic flux chamber was used to measure the air/surface exchange of mercury in some areas of the Negro river basin with different vegetal coverings. At the two forest sites (flooding and non-flooding), low mercury fluxes were observed: maximum of 3 pmol m-2 h-1 - day and minimum of -1 pmol m-2 h-1 - n
Química Nova. Publicado em: 2005-12
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7. Fontes autotróficas de energia para peixes do canal principal e quelônios ao longo da bacia do médio rio Negro, Amazônia Brasil
The main channel of the middle rio Negro basin is characterized by high concentrations of dissolved organic matter, low nutrient levels and low primary production. The principal autotrophs in the river system are phytoplankton, periphyton, and flooded-forest (igapó) trees. Leaves, fruits and seeds fall from igapó forests are responsible for 99% of autotrop
Publicado em: 2005
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8. A dinamica biogeoquimica do mercurio na bacia do Rio Negro (AM) e fluxos na interface agua/atmosfera
The biogeochemistry of mercury, including the evaluation of Dissolved Gaseous Mercury (DGM) fluxes at the interface water/air in the Rio Negro basin was carried out assuming four different approaches: (a) measurements of total mercury in the atmosphere and in the total precipitation, as well as total, reactive and dissolved gaseous mercury in the surface wat
Publicado em: 2004