Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/8640
Título: Zooplankton, micronekton and biological pump: Beyond the mesopelagic zone
Autores/as: Hernández-León, Santiago 
Clasificación UNESCO: 251001 Oceanografía biológica
Palabras clave: Climate change
Biological pump
Active flux
Ciencia Compartida
Fecha de publicación: 2012
Conferencia: Segundo ciclo de Ciencia Compartida 
Resumen: Migrant biota transports carbon to the mesopelagic zone due to their feeding at the shallower layers and their defecation, respiration, excretion and mortality at depth. The so-called active flux has been considered a small number compared to gravitational sinking. Recent assessments in subtropical waters show an important effect due to predation by interzonal diel vertical migrants (DVMs). The consumption and subsequent transport of epipelagic zooplankton by DVMs (mainly micronekton) to the mesopelagic zone seemed similar to the mean gravitational export. However, the consequences of this active transport to the bathypelagic zone are almost unknown. Here, we show the effect of the Atlantic and Pacific equatorial upwelling systems on the vertical distribution of acoustic backscatter from the surface to bathypelagic depths. The enhancement of the acoustic signal below the upwelling zone was observed to reach 4000 m depth, coinciding with high abundances and activity of bacteria at those depths. The results suggest an active carbon transport from the epipelagic driven by zooplankton and micronekton, enhancing the efficiency of the biological pump and giving an insight about the fate of an increased productivity at the shallower layers of the ocean
URI: http://hdl.handle.net/10553/8640
Fuente: Universidad de Las Palmas de Gran Canaria. Biblioteca de Ciencias Básicas Carlos Bas. Segundo Ciclo de Ciencia Compartida (Octubre 2012)
Derechos: by-nc-nd
Colección:Vídeo
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