Distribution and characterization of dissolved and particulate organic matter in Antarctic pack ice

被引：31
作者：
Dumont, I. [1 ]
Schoemann, V. [1 ]
Lannuzel, D. [2 ]
Chou, L. [2 ]
Tison, J. -L. [3 ]
Becquevort, S. [1 ]
机构：
[1] Univ Libre Bruxelles, Fac Sci, B-1050 Brussels, Belgium
[2] Univ Libre Bruxelles, Lab Oceanog Chim & Geochimie Eaux, Fac Sci, B-1050 Brussels, Belgium
[3] Univ Libre Bruxelles, Unit Glaciol, Fac Sci, B-1050 Brussels, Belgium
来源：
POLAR BIOLOGY | 2009年 / 32卷 / 05期
关键词：
Sea ice; Organic carbon; Monosaccharides; Polysaccharides; Amino acids; TEP; TRANSPARENT EXOPOLYMER PARTICLES; BAY ROSS-SEA; WEDDELL SEA; CHEMICAL-COMPOSITION; GROWTH EFFICIENCY; BACTERIAL-GROWTH; NITROGEN-CONTENT; AMINO-ACIDS; FOOD WEBS; CARBON;
D O I：
10.1007/s00300-008-0577-y
中图分类号：
X176 [生物多样性保护];
学科分类号：
090705 ;
摘要：
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 mu M C, respectively and transparent exopolymeric particles (TEP) up to 3,071 mu g Xanthan gum equivalent l(-1). POC and TEP seemed to be influenced 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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页码：733 / 750
页数：18
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