Primary and extracellular production during Austral summer at 70 degrees S, 12 degrees E, Antarctica
Abstract
Much of the @u14@@C radioactivity supplied as NaH@u14@@CO@d3@@ accumulates in the low molecular weight fraction of the particulate matter, into polysaccharides and proteins. There was little radioactivity in the lipid component. Phytoplankton exudation showed a significant decline with greater depth within the euphotic column. The quality of material exuded also varied. In some cases, a greater amount of aminoacids was released whereas in other cases organic acids formed the greater fraction. These data are discussed in relation to physical oceanographic factors
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