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Distribution and characterization of dissolved and particulate organic matter in Antarctic pack ice
Dumont, I.; Schoemann, V.; Lannuzel, D.; Chou, L.; Tison, J.-L.; Becquevort, S. (2009). Distribution and characterization of dissolved and particulate organic matter in Antarctic pack ice. Polar Biol. 32(5): 733-750. hdl.handle.net/10.1007/s00300-008-0577-y
In: Polar Biology. Springer-Verlag: Berlin; Heidelberg. ISSN 0722-4060, more
Peer reviewed article  

Available in Authors 
    VLIZ: Open Repository 239942 [ OMA ]

Keyword
    Marine
Author keywords
    Sea ice · Organic carbon · Monosaccharides · Polysaccharides · Amino acids · TEP

Authors  Top 

Abstract
    Distribution and composition of organic matter were investigated in Antarctic pack ice in early spring and summer. Accumulation of organic compounds was observed with dissolved organic carbon (DOC) and particulate organic carbon (POC) reaching 717 and 470 µM C, respectively and transparent exopolymeric particles (TEP) up to 3,071 µg Xanthan gum equivalent l-1. POC and TEP seemed to be inXuenced mainly by algae. Particulate saccharides accounted for 0.2–24.1% (mean, 7.8%) of POC. Dissolved total saccharides represented 0.4–29.6% (mean, 9.7%) of DOC, while dissolved free amino acids (DFAA) accounted for only 1% of DOC. Concentrations of TEP were positively correlated with those of saccharides. Monosaccharides (d-MCHO) dominated during winter–early spring, whereas dissolved polysaccharides did in spring–summer. DFAA were strongly correlated with d-MCHO, suggesting a similar pathway of production. The accumulation of monomers in winter is thought to result from limitation of bacterial activities rather than from the nature of the substrates.

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