Particulate matter flux interception in oceanic mesoscale eddies by the polychaete Poeobius sp.


"Gelatinous zooplankton hold key functions in the ocean and have been shown to significantly influence the transport of organic carbon to the deep sea. We discovered a gelatinous, flux‐feeding polychaete of the genus Poeobius in very high abundances in a mesoscale eddy in the tropical Atlantic Ocean, where it co‐occurred with extremely low particle concentrations. Subsequent analysis of an extensive in situ imaging dataset revealed that Poeobius sp. occurred sporadically between 5°S–20°N and 16°W–46°W in the upper 1000 m. [...]"

Source: Limnology and Oceanography
Authors: Svenja Christiansen et al.
DOI: 10.1002/lno.10926

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Particle export fluxes to the oxygen minimum zone of the eastern tropical North Atlantic


"In the ocean, sinking of particulate organic matter (POM) drives carbon export from the euphotic zone and supplies nutrition to mesopelagic communities, the feeding and degradation activities of which in turn lead to export flux attenuation. Oxygen (O2) minimum zones (OMZs) with suboxic water layers (< 5 µmol O2 kg−1) show a lower carbon flux attenuation compared to well-oxygenated waters (> 100 µmol O2 kg−1), supposedly due to reduced heterotrophic activity. [...]"

Source: Biogeosciences 14
Authors: Anja Engel et al.
DOI: 10.5194/bg-14-1825-2017

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