Salinity Gradient
Mostrando 13-24 de 44 artigos, teses e dissertações.
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13. Distribution of prokaryotic organisms in a tropical estuary influenced by sugar cane agriculture in northeast Brazil
In a joint Brazilian-German case study, distribution patterns of microorganisms were compared with environmental variables in the tropical coastal Manguaba lagoon in northeast Brazil, which is situated downstream of several sugar cane processing plants . 16S rDNA and 16S rRNA single strand conformation polymorphism (SSCP) gene fingerprinting were used to fol
Brazilian Journal of Microbiology. Publicado em: 2010-12
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14. Factors structuring fish assemblages in three distinct zones (river, mixture and coastal) of the rio Mambucaba estuary, Angra dos Reis-RJ. / Fatores estruturadores das assembléias de peixes em três distintas zonas (rio, mistura e costeira) do estuário do rio Mambucaba, Angra dos Reis- RJ.
The estuarine systems influence fish assemblages, throughout their longitudinal gradients and remarkable salinity changes. Such assemblages adapt to different habitat constraints and change in spatial and temporal scales. The aim of this study was to assess the ichthyofauna composition and structure in three zones of the Mambucaba estuary (CZ coastal zone; M
Publicado em: 2009
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15. MesozooplÃncton da Bacia do Pina, Recife, Pernambuco
This study aimed to describe the structure of the mesozooplankton community from the Pina Basin, Recife, PE-Brazil. Different time scales were used: tidal, seasonal and on a spatial gradient: from the interior of the estuary, subject to continental influence, and until the connection to the ocean, with more marine influence. The zooplankton was analyzed in t
Publicado em: 2009
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16. Processos dinÃmicos e evolutivos da zona costeira de Itamaracà por sensoriamento remoto e medidas in situ
The coastal zone of Itamaracà is like a highly dynamic environment where land and oceanic processes interact altering frequently coastal characteristics. In this context, this current study examines the responsible processes of such changes from the development and application of methodologies, which includes digital image processing and the obtaining of in
Publicado em: 2009
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17. ZooplÃcton como indicador da qualidade ambiental nos estuÃrios dos rios Carrapicho e Botafogo, ItamaracÃ, PE
This study was carried out at the estuaries of Carrapicho and Botafogo rivers, ItamaracÃ, Pernambuco, to access the zooplankton biodiversity and indicators species of environmental quality. Sampling were done from August/2003 to August/2004 during ebb tide, along two transects: one in the Botafogo river estuary (gradient of pollution) and another in the Car
Publicado em: 2008
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18. VariaÃÃo espaÃo-temporal das espÃcies da famÃlia Ariidae (Siluriformes) no EstuÃrio do Rio Goiana (PE / PB â Brasil)
The objective of this study was to describe the seasonal variation of the species of the Ariidae Family (biomass and density) in relation to the variables space and time, in the estuary of Goiana River Estuary (NE/Brazil). From December of 2005 to November of 2006, two hundred and sixteen samples were taken representing a total sampled area of 23ha. About 60
Publicado em: 2008
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19. Cerrado sensu stricto sobre Neossolo Quartzarênico : fitogeografia e conservação
The Cerrado biome presents a large spatial heterogeneity and is characterized as having elevated beta diversity. The Sete Cidades National Park (PNSC) and Chapada Grande Meridional, both located at the state of Piauí, show great landscape diversity with different physiognomies and soils types. In this study, we investigated the woody vegetation of the cerra
Publicado em: 2008
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20. A associação entre o zooplâncton e Vibrio cholerae O1 e O139 no complexo estuarino de Santos - Bertioga e Plataforma adjacente / The association between zooplankton and Vibrio cholerae O1 and O139 on Santos-Bertioga estuarine system and adjacent shelf
Vibrio cholerae is an autochthonous bacterium in the sea and may cause serious health problems when pathogenic strains are accidentally ingested. V. cholerae are found associated with copepods in concentrations up to a thousand times higher than the free bacteria in the water. If ingested, a single copepod may have enough bacteria necessary for human infecti
Publicado em: 2007
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21. Composição e abundância do fitoplâncton do sudoeste da Reserva Biológica do Lago Piratuba (Amapá, Brasil)
The present study was done on the southwest of the Lago Piratuba Biological Reserve, on Araguari river floodplain, Amapá coast region, Brazil. The environments were the lakes Comprido de Cima, Bacia, Lodão, Ventos, Grande and Comprido de Baixo and the Araguari River downstream. This region is submitted to an influence of the semidiurnal tide from the Amazo
Publicado em: 2007
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22. DETERMINAÇÃO POLAROGRÁFICA DE METAIS EM AMBIENTES DO SISTEMA PATOS-MIRIM
A permanente troca de massas dágua entre o sistema Patos-Mirim, faz com que a região estuarina apresente alta variabilidade de salinidade e que, em um mesmo dia, as condições do estuário sejam alteradas de homogêneo a estratificado e vice-versa, sendo um ambiente riquíssimo a ser estudado. Historicamente, o teor de metais pesados tem sido usado como p
Publicado em: 2004
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23. Distribuição espacial e temporal de Cetengraulis edentulus (Cuvier) (Actinopterygii, Engraulidae) na Baía de Sepetiba, Rio de Janeiro, Brasil
Anchovies are members of the Engraulidae family, characterized to present coastal pelagic habits, concentrating in large schoolings distributed among the continental shelf and semi-closed environment, like bays, where they are target of heavy fisheries. The present study aims to describe spatial and temporal distribution of Cetengraulis edentulous (Cuvier, 1
Revista Brasileira de Zoologia. Publicado em: 2003-12
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24. Proteina desacopladora de plantas : efeito do estresse oxidativo na sua expressão e atividade e reconstituição funcional da isoforma de Arabidopsis thaliana
The present work is divided in two parts: the functional reconstitution of the Arabidopsis thaZiana uncoupling protein 1 (AtPUMPI) and the expression and activity of the uncoupling protein under several abiotic stresses. AtPUMPI expression in Saccharomyces cerevisae and Escherichia coZi allowed us to confirm that this gene codes for a true uncoupling protein
Publicado em: 2003