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El ictioplancton en la región canaria: Abundancia, distribución y composición taxonómica larvaria

Authors: Rodríguez, J.M. (José María);

El ictioplancton en la región canaria: Abundancia, distribución y composición taxonómica larvaria

Abstract

En esta memoria se presentan los resultados del estudio del ictioplancton de la región Canaria y su relación con los procesos oceanográficos mesoescalares que afectan a la zona. La región Canaria, bañada por la corriente de Canarias, está afectada por diferentes procesos oceanográficos que operan a mesoescala. Unos son inducidos por la presencia de las propias islas, que funcionan como una barrera para los flujos atmosférico (vientos alisios) y oceánico (corriente de Canarias), lo que introduce una fuerte variabilidad en dichos flujos, que induce la formación de estructuras como remolinos entre islas y remolinos y estelas cálidas a sotavento de aquellas; estos fenómenos, en el ámbito biológico, en esencia, se traducen en un incremento en la producción planctónica y, de forma genérica, se denominan efecto de isla. Otros dependen de los efectos que el afloramiento del noroeste africano tiene sobre aquella región, como son el fuerte gradiente térmico que, en sentido este-oeste, producen las aguas afloradas, o los filamentos de afloramiento que, durante la estación de máxima intensidad de aquel, llegan a alcanzar la parte oriental de la región Canaria. Afloramientos y filamentos convierten esta región en una zona de transición entre un ambiente típicamente oceánico, oligotrófico, y otro de afloramiento costero, altamente productivo. Todo lo anterior hace que las condiciones oceanográficas en esta región sean relativamente variables, tanto espacial como temporalmente. Para estudiar la variabilidad introducida por las islas y la influencia del afloramiento africano en la región se llevó a cabo la campaña Canarias-9110. La influencia del afloramiento africano en el área se estudió a través de un filamento de éste durante la primera parte de la campaña Canarias-9308. [Ver Resumen completo en pdf].

In this report, the results of a study of ichthyoplankton from the Canary region and their relationship with the mesoscale oceanographic processes affecting them are presented. The Canary region, bathed by the Canary Current, is affected by different rnesoscale oceanographic processes. Some are induced by the presence of the islands themselves, which function as a barrier for atmospheric (trade winds) and oceanic flows (the Canary current), introducing a strong variability in these flows by generating structures, such as eddies between the islands and eddies and warm wakes to leeward of the islands. On a biological level, these phenomena essentially entail an increase in planktonic production and are known generically as island mass effect. Others depend on the effects that the northwest African upwelling exerts on this region, such as the important thermal gradient which, in an east-west direction, produces the upwelled waters or upwelling filaments which, during the period of maximum intensity of the upwelling, reach the eastern part of the Canary region. Upwellings and filaments convert the Canary region into a transition zone between some typically oceanic conditions, oligotrophic, and some highly productive conditions of coastal upwelling. All of this makes the oceanographic conditions in the region relatively variable, both spatially and temporally. To study the variability introduced by the islands and the influence of the African upwelling on the Canary region, the cruise Canarias-9110 was carried out. The influence of the African upwelling on this region, through one of its filaments, was studied during the first part of the cruise Canarias-9308. [See full Summary pdf].

Instituto Español de Oceanografía

SI

Country
Spain
Keywords

Upwelling, Taxonomic composition, Distribución, Upwelling filaments, Efecto de isla, Distribution, Composición taxonómica, Región Canaria, Afloramiento, Icthyoplankton, Ictioplancton, Abundance, Filamentos de afloramiento, Abundancia, Centro Oceanográfico de Canarias, Medio Marino, Canary region, Island mass effect, Remolinos, Eddies

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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