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Abundance and distribution of heterotrophic flagellates in the global deep ocean

AuthorsPernice, Massimo ; Gomes, Ana ; Gasol, Josep M. ; Massana, Ramon
Issue Date8-Jul-2012
Citation2012 ASLO Aquatic Sciences Meeting - Meeting program: 38 (2012)
AbstractHeterotrophic flagellates (HF) play an important role in marine food webs. Despite the presence of these protists is proved in the deep ocean, there is a lack of information about the general patterns of their abundance and distribution. This work is the first attempt to describe the heterotrophic flagellate assemblage in deep ecosystems at a global level. Samples come from the Malaspina expedition that includes stations all around the world. We analyzed through flow citometry and epifluorescence microscopy the abundance of HF at 4000 m and in some depth profiles from the mesopelagic to bathypelagic region. The abundance of HF was generally low (less than 10 cells ml-1), although it was somewhat higher in certain regions, such as the Southern Pacific. A second step was to identify the environmental parameters that explain the distributional patterns. Furthermore we analyzed the ratio bacteria to flagellate abundances to shed light into the structure of the food web in such deep, dark and very oligotrophic regions
Description2012 ASLO Aquatic Sciences Meeting: Voyages of Discovery, 8-13 July 2012, Lake Biwa, Shiga, Japan
Publisher version (URL)http://www.aslo.org/japan2012/index.html
Appears in Collections:(ICM) Comunicaciones congresos
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