Polysaccharide aggregation as a potential sink of marine dissolved organic carbon.

Engel, Anja , Thoms, S., Riebesell, Ulf , Rochelle-Newall, E. and Zondervan, I. (2004) Polysaccharide aggregation as a potential sink of marine dissolved organic carbon. Nature, 428 . pp. 929-932. DOI 10.1038/nature02453.

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The formation and sinking of biogenic particles mediate vertical mass fluxes and drive elemental cycling in the ocean1. Whereas marine sciences have focused primarily on particle production by phytoplankton growth, particle formation by the assembly of organic macromolecules has almost been neglected2, 3. Here we show, by means of a combined experimental and modelling study, that the formation of polysaccharide particles is an important pathway to convert dissolved into particulate organic carbon during phytoplankton blooms, and can be described in terms of aggregation kinetics. Our findings suggest that aggregation processes in the ocean cascade from the molecular scale up to the size of fast-settling particles, and give new insights into the cycling and export of biogeochemical key elements such as carbon, iron and thorium.

Document Type: Article
Keywords: Marine chemistry; Marine Biology; marine dissolved organic carbon; DOC
Research affiliation: AWI
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1038/nature02453
ISSN: 0028-0836
Date Deposited: 26 Jan 2009 12:19
Last Modified: 10 Mar 2017 12:59
URI: http://oceanrep.geomar.de/id/eprint/214

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