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	Provedor de dados OceanDocs (2) Autor Gaitán, E.N. (2) Palavra-chave Abundance (1) Benthos (1) Brackishwater environment (1) Brackishwater fish (1) Carbon isotopes (1) Ecological aggregations (1) Estuarine front (1) Food webs (1) Geographical distribution (1) Life history (1) Marine environment (1) Marine fish (1) Nitrogen isotopes (1) Plankton (1) Saline fronts (1) Seasonal variations (1) Trophic levels (1) Trophic relationships (1) Mais... Tipo do documento Theses and Dissertations (2) Ano 2012 (1) 2004 (1) País Belgium (2) Idioma Espanhol (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Distribución, abundancia y estacionalidad de Liriope tetraphylla (Hidromedusa, Trachymedusae) en el Océano Atlántico Sudoccidental y su rol ecológico en el estuario del Río de la Plata OceanDocs Gaitán, E.N.. In zones of high productivity and/or in shallow waters (frontal or upwellings areas, bays and estuaries) the hydromedusae can reach exceptional abundances, denominated 'blooms'. Occasionally, these exceptional abundances are originated from some few individuals that constitute a 'seed population', which is retained in particular places while the environmental conditions are adverse. Liriope tetraphylla is a holoplanktonic and oceanic hydromedusae that often is found forming dense aggregations, which are developed mainly in the Buenos Aires coast during the summer in Argentinian waters (SW Atlantic). The temporal-space distribution and the abundance of L. Tetraphylla in the Subantarctic region were analyzed, with 1458 samples embracing the Argentinian and... Tipo: Theses and Dissertations Palavras-chave: Ecological aggregations; Geographical distribution; Abundance; Seasonal variations; Life history. Ano: 2004 URL: http://hdl.handle.net/1834/5029 Tramas tróficas en sistemas frontales del Mar Argentino: estructura, dinámica y complejidad analizada mediante isótopos estables OceanDocs Gaitán, E.N.. Two of the most important frontal systems of the Argentine Sea (SW Atlantic Ocean) were compared to obtain evidences on the regulatory mechanisms of food web length, incorporating both spatial (areas within fronts) and temporal (presence or absence of frontal structure) variability. The stable isotopes of Carbon and Nitrogen were used to evaluate the origin and composition of the organic matter used by primary consumers, the structure of food webs, the trophic levels of several taxa and the benthic-pelagic coupling within each system. In the Río de la Plata estuarine front, different sources of organic matter would support the food webs occurring in the three areas of the system. The particulate organic material (POM) would be the main resource supporting... Tipo: Theses and Dissertations Palavras-chave: Food webs; Trophic relationships; Trophic levels; Saline fronts; Estuarine front; Carbon isotopes; Nitrogen isotopes; Plankton; Benthos; Brackishwater fish; Marine fish; Brackishwater environment; Marine environment. Ano: 2012 URL: http://hdl.handle.net/1834/4523 Registros recuperados: 2 Primeira ... 1 ... Última

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