Uncoupled distributions of transparent exopolymer particles (TEP) and dissolved carbohydrates in the Southern Ocean
type: Dataset
description: Transparent exopolymer particles (TEP) are formed by the assembly of dissolved precursors, mainly mono and polysaccharides (DMCHO and DPCHO) that are released by microorganisms. Although TEP formation plays a significant role in carbon export to deep waters and can affect gas exchange at the sea surface, simultaneous measurements of TEP and their precursors in natural waters have been scantly reported. In this study, we described the spatial (vertical and regional) distribution of TEP, DMCHO and DPCHO in a region located around the Antarctic Peninsula, assessed their contribution to the total organic carbon pool, and explored their relationships with phytoplankton (with chlorophyll a (chl a) as a proxy) and bacteria. TEP concentration ranged from undetectable values to 48.9 mu g XG eq L-1 with a mean value of 15.4 mu g XG eq L-1 (11.6 mu g TEP-C L-1). DMCHO and DPCHO showed average values of 4.3 mu mol C L-1 and 8.6 mu mol C L-1. respectively. We did not find simple relationships between the concentrations of TEP and dissolved carbohydrates, but a negative correlation between DMCHO and DPCHO was observed. Chl a was the best regressor of TEP concentration in waters within the upper mixed layer, while bacterial production was the best regressor of TEP concentration below the mixed layer, underlining the direct link between these particles and bacterial activity in deep waters. (C) 2009 Elsevier B.V. All rights reserved.
issued: 2026-05-20T19:01:02.352206
language: en
modified: 2026-05-20T19:01:02.352212
contact point: Organization
  fn: CCSD
keyword: abundance
keyword: antarctica
keyword: atlantic-ocean
keyword: bacterial-colonization
keyword: carbohydrates
keyword: infoeu-reposemanticsarticle
keyword: journal-articles
keyword: marine-bacterioplankton
keyword: monosaccharides
keyword: organic-carbon
keyword: phytoplankton
keyword: polar-front
keyword: polysaccharides
keyword: ross-sea
keyword: sduoceansciences-of-the-universe-physicsocean-atmosphere
keyword: southern-ocean
keyword: spatial-distribution
keyword: transparent-exopolymer-particles
landing page: 0304-4203

Uncoupled distributions of transparent exopolymer particles (TEP) and dissolved carbohydrates in the Southern Ocean
type: Distribution
format: HTML
issued: 2026-05-20T19:01:02.374560
modified: 2026-05-20T19:01:02.288607
access URL: https://hal.science/hal-00691368

test_moissonnage_selune
type: Agent