Estuarine Sediment
Mostrando 13-24 de 121 artigos, teses e dissertações.
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13. ESTUDO COMPARATIVO ENTRE EXTRAÇÃO SOXHLET E ULTRASOM PARA DETERMINAÇÃO DE HIDROCARBONETOS POLICÍCLICOS AROMÁTICOS EM SEDIMENTOS DO ESTUÁRIO DO RIO SERGIPE POR CROMATOGRAFIA A GÁS ACOPLADA A ESPECTROMETRIA DE MASSAS. / COMPARATIVE STUDY OF EXTRACTION SOXHLET AND ULTRASOUND DETERMINATION FOR OIL POLYCYCLIC AROMATIC SEDIMENTS SERGIPE RIVER ESTUARY BY GAS CHROMATOGRAPHY MASS SPECTROMETRY ATTACHED.
Polycyclic aromatic hydrocarbons (PAHs) are compounds that can be found in environmental compartments such as atmosphere, soil, sediment and water. Throughout bioaccumulation, they can also be incorporated into vegetables and animals tissues. They are mainly originated from anthropogenic sources such as fossil fuels and biomass burnings. Due they potential t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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14. Os Nematoda da plataforma continental ao largo do sistema estuarino de Santos / Nematoda of the continental shelf off Santos estuarine system
To assess the influence of Santos estuarine system on the nematodes of the adjacent continental shelf, the density, composition and generic diversity of this group were analyzed and related to the sediment type, organic matter content and phytopigments biomass. The sediment was collected at six stations, in the winter of 2005 and summer of 2006, with a box-c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/03/2011
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15. Natural diet of Neohelice granulata (Dana, 1851) (Crustacea, Varunidae) in two salt marshes of the estuarine region of the Lagoa dos Patos lagoon
Natural diet of Neohelice granulata in two salt marshes of Lagoa dos Patos, RS were studied. Sampling was performed seasonally and crabs were captured by hand by three persons during one hour, fixed in formaldehyde (4%) during 24 h, transferred to alcohol (70%). Each foregut was weighed and repletion level was determined. Differences between sexes in the fre
Brazilian Archives of Biology and Technology. Publicado em: 2011-02
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16. Esterois como indicadores do acúmulo de esgotos domésticos em sedimentos de um sistema estuarino-lagunar tropical (Mundaú-Manguaba, AL)
The history of sewage contamination in the Mundaú-Manguaba estuarine lagoon system (NE Brazilian coastal zone) was evaluated through the concentration of sterols in sediment cores. The concentration of coprostanol increased towards the surface sediments, with the maximum of 5.65 µg g-1 at 0-2 cm sediment layer in Mundaú. Manguaba exhibited a lower level o
Química Nova. Publicado em: 2011
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17. Modelagem numérica da dinâmica do sistema estuarino Caravelas - Peruíbe, BA / Numerical modeling of the Caravelas-Peruíbe (BA) estuarine system
O presente trabalho visa caracterizar, através de experimentos numéricos, a hidrodinâmica e o transporte de sedimentos em suspensão no sistema estuarino de Caravelas e Peruípe sob diferentes condições forçantes. O sistema é formado por canais que estabelecem a conexão entre os rios Caravelas e Peruípe. Dados de nível de água e velocidade de corr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/09/2010
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18. Determination of net sediment transport patterns in Lirquén Harbor, Chile, through grain-size trend analysis: a test of methods
During June 1997, bottom sediment samples were collected at 76 stations on a rectangular grid in a small port (Lirquén Harbor, south-central Chile) facing siltation problems. The spatial changes in grain-size parameters, analyzed by using three different methodologies to infer net sediment transport paths, are compared with the measured water circulation of
Publicado em: 2010
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19. Estudo sobre a evolução do aporte natural e antrópico de matéria orgânica para sedimentos de um sistema estuarino- lagunar tropical (Mundaú-Manguaba, Alagoas) utilizando lipídios como marcadores moleculares / Study on the evolution of natural and anthropogenic inputs of organic matter for sediments of a tropical lagoon-estuarine system (Mundaú-Manguaba, Alagoas) using lipids as molecular markers
This thesis presents a study on the accumulation of organic matter in the sediments of the complex estuarine lagoon Mundaú Manguaba (CELMM) using lipids (fatty acids, sterols and linear alcohols) as molecular markers to evaluate the sources (natural and anthropogenic) and spatial and temporal variation in the composition of sedimentary organic matter, as we
Publicado em: 2010
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20. Diagnóstico ecotoxicológico dos efluentes lançados no complexo estuarino do Jundiaí/Potengi, Natal/RN
Untreated effluents that reach surface water affect the aquatic life and humans. This study aimed to evaluate the wastewaters toxicity (municipal, industrial and shrimp pond effluents) released in the Estuarine Complex of Jundiaí- Potengi, Natal/RN, through chronic quantitative e qualitative toxicity tests using the test organism Mysidopsis Juniae, CRUSTACE
Publicado em: 2010
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21. Spatial distribution of the estuarine ichthyofauna of the Rio Formoso (Pernambuco, Brazil), with emphasis on reef fish
The objectives of the present study were to identify species of reef fish that use the Rio Formoso estuary (northeastern Brazil) as a refuge and natural nursery and to describe the spatial distribution of the estuary fish fauna in rainy and dry seasons. A total of 5475 specimens, across 78 species and 39 families, were analyzed; 51.3% of the species were of
Zoologia (Curitiba). Publicado em: 2009-06
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22. 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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23. Distribution, income rate, chemical composition and identification of plastic pellets emissions at Santos Bay, SP, Brazil / Distribuição, taxa de entrada, composição química e identificação de fontes de grânulos plásticos na Enseada de Santos, SP, Brasil
Among the various pollutants that threaten the ocean are plastic pellets, prime resource in the form of 5mm granules that are being dumped in the environment during production, utilization and transport stages. This project aims to understand of the contamination of the beaches of the Santos Bay, coast of the state of São Paulo, as a pilot area to address t
Publicado em: 2009
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24. As comunidades macrobentÃnicas na avaliaÃÃo da qualidade ambiental de Ãreas estuarinas de Pernambuco
Estuarine environments are known by its importance in terms of complexity and biodiversity; however, anthropogenic activities continue to have a detrimental effect on its biodiversity levels on a worldwidescale. Several studies have emphasized the role of benthic macroinvertebrates as indicators of environmental quality status in these ecosystems, which have
Publicado em: 2009