CS26 Organic Carbon Dynamics
Date: Thursday, June 13, 2002
Location: Poster Session - VCC
 
MeinersK, Institute for Polar Ecology, Kiel, Germany, kmeiners@ipoe.uni-kiel.de
Fehling, J, , Dunstaffnage Marine Laboratory, Oban, United Kingdom, 
Gradinger, R, , University of Alaska Fairbanks, Fairbanks, USA, 
 
TRANSPARENT EXOPOLYMER PARTICLES (TEP) IN ARCTIC SEA ICE AND UNDERLYING WATER
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The abundance and size distribution of transparent exopolymer particles (TEP) were determined in and below pack ice of the Greenland Sea during autumn 1999. Samples were collected from young, first-year and multi-year sea ice. TEP data were determined over the entire ice thickness and were correlated to abiotic (temperature, salinity, nutrient-concentrations) and biotic (diatom abundance, total bacterial number, particulate organic carbon and nitrogen (POC/PON)) parameters. Total TEP area in the ice samples ranged between 0.5 cm2/l and 16.2 cm2/l, the under-ice water data from 0.3 cm2/l to 1.4 cm2/l. Microscopically derived size spectra of TEP in the sea ice generally followed a power-law function and were comparable to those found for TEP in the under-ice water. We consider diatoms as the main producers of exopolymeric substances in Arctic sea ice. Based on our observations we discuss the potential ecological role of TEP for the sea ice biota and their habitat.