Environmental conditions, particle flux and sympagic microalgal succession in spring before the sea-ice break-up in Adélie Land, East Antarctica

  • Catherine Riaux-Gobin LABEX "CORAIL", USR 3278 CNRS–EPHE, CRIOBE–Perpignan University, FR–66860 Perpignan, FRANCE,
  • Gerhard S. Dieckmann Alfred-Wegener-Institut für Polar und Meeresforschung Am Handelshafen 12, GE–27570 Bremerhaven, GERMANY
  • Michel Poulin Research Division, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa ON K1P 6P4, CANADA,
  • Jacques Neveux CNRS, UMR 7621, FR–66650 Banyuls–sur–Mer, FRANCE
  • Céline Labrune CNRS, UMR 7621, FR–66650 Banyuls–sur–Mer, FRANCE
  • Gilles Vétion CNRS, UMR 7621, FR–66650 Banyuls–sur–Mer, FRANCE
Keywords: land-fast ice, oceanic short-term regime, POM flux, sympagic communities, East Antarctica

Abstract

Data pertaining to environmental conditions, sympagic (sea ice) microalgal dynamics and particle flux were collected before the spring ice break-up 2001 in Pierre Lejay Bay, adjacent to the Dumont d'Urville Station, Petrel Island, East Antarctica. An array of two multiple sediment traps and a current meter was deployed for five weeks, from 8 November to 6 December 2001. The sea-ice chlorophyll a and particulate organic carbon (POC) averaged 0.6 mg l−1 (30 mg m−2) and 20 mg l−1 (1 g m−2) near the coast. The POC export flux that reached a maximum of 79 mg m−2 d−1 during the study period was high compared to the one for the Weddell Sea. The flux was homogeneous from the surface to 47 m depth and increased sharply 33 days before the effective ice break-up. A north-western progressive vector of currents (i.e., Lagrangian drift) in the sub-ice surface waters was demonstrated. Bottom ice, platelet ice and under-ice water at 5 m were characterized by differences in colonization and short-term succession of microalgae.

Keywords: Land-fast ice; oceanic short-term regime; POM flux; sympagic communities; East Antarctica

(Published: 8 August 2013)

Citation: Polar Research 2013, 32, 19675, http://dx.doi.org/10.3402/polar.v32i0.19675

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Published
2013-08-08
How to Cite
Riaux-Gobin, C., Dieckmann, G., Poulin, M., Neveux, J., Labrune, C., & Vétion, G. (2013). Environmental conditions, particle flux and sympagic microalgal succession in spring before the sea-ice break-up in Adélie Land, East Antarctica. Polar Research, 32. https://doi.org/10.3402/polar.v32i0.19675
Section
Research/review articles