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	Provedor de dados ArchiMer (2) Autor Baptista, Am (1) Cabral, H (1) Costa, Mj (1) Fortunato, Ab (1) Oliveira, A (1) Prista, N (1) Vasconcelos, Rp (1) Mais... Palavra-chave Estuaire du Tage (2) Tagus estuary (2) Assemblage de poissons (1) Coastal area (1) Community structure (1) Environmental conditions (1) Environnement (1) Estran (1) Fish assemblage (1) Modèle numérique (1) Numerical model (1) Propagation de marée (1) Structure de la communauté (1) Tidal flats (1) Tidal propagation (1) Zone côtière (1) Mais... Tipo do documento Text (2) Ano 2003 (1) 1999 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última On the effect of tidal flats on the hydrodynamics of the Tagus estuary ArchiMer Fortunato, Ab; Oliveira, A; Baptista, Am. The effects of tidal flats on the hydrodynamics of the Tagus estuary are analysed using an accurate high-resolution shallow water model, supported by field data. Tidal flats act mainly as energy filters, rather than sinks, transferring energy from astronomic to non-linear frequencies. They also play a major role in determining the strong resonance mode that amplifies semi-diurnal constituents. We show that the upper estuary, with extensive tidal flats, has an increasing accretion rate. This "filling-up" results from a positive feedback between sediment deposition and the hydrodynamics: accretion in the upper estuary lengthens the duration of ebbs, decreasing sediment flushing and further increasing accretion. Tipo: Text Palavras-chave: Estran; Propagation de marée; Modèle numérique; Estuaire du Tage; Tidal flats; Tidal propagation; Numerical model; Tagus estuary. Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43626/43257.pdf The demersal fish assemblage of the coastal area adjacent to the Tagus estuary (Portugal): relationships with environmental conditions ArchiMer Prista, N; Vasconcelos, Rp; Costa, Mj; Cabral, H. The subtidal fish assemblage of Tagus estuary coastal area was sampled in order to infer about its relationship to environmental conditions and its possible nursery function for marine species. Fish sampling took place between May 2001 and February 2002 with an otter trawl. In addition to fish sampling, a physical, chemical and biological characterization of the water column and bottom sediment was performed. Density and biomass were determined and ecological and feeding guilds assigned to each fish species. Correspondence analysis (CA) was used to determine the spatio-temporal structure of the assemblage and its correlation to environmental variables. A total of 36 fish species were identified. The fish assemblage was dominated by few species, both in... Tipo: Text Palavras-chave: Zone côtière; Assemblage de poissons; Structure de la communauté; Environnement; Estuaire du Tage; Coastal area; Fish assemblage; Community structure; Environmental conditions; Tagus estuary. Ano: 2003 URL: http://archimer.ifremer.fr/doc/00321/43245/42974.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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