Spring phytoplankton onset after the ice break-up and sea-ice signature (Adélie Land, East Antarctica)

Polar research

Michel Poulin¹  Céline Labrune²  Gerhard Dieckmann³  Gilles Vétion⁴  Catherine Riaux-Gobin⁵ 

[1] UMR 7621 Centre National de la Recherche Scientifique, Université Pierre et Marie Curie-Paris 6FR-66650 Banyuls-sur-Mer France Correspondence;Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12GE-27570 Bremerhaven Germany;Research Division, Canadian Museum of Nature PO Box 3443, Station DOttawa, ON, K1P 6P4, Canada;UMR 7621 Centre National de la Recherche Scientifique, Université Pierre et Marie Curie-Paris 6FR-66650 Banyuls-sur-Mer France;USR 3278 Centre National de la Recherche Scientifique, École Pratique des Hautes Études, Centre de Recherches Insulaires et Observatoire de l'Environnement, Université de PerpignanFR-66860 Perpignan France

关键词: Ice break-up;    phytoplankton;    sea-ice signature;    East Antarctica;   

DOI  :  10.3402/polar.v30i0.5910

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

The phytoplankton onset following the spring ice break-up in Adélie Land, East Antarctica, was studied along a short transect, from 400 m off the continent to 5 km offshore, during the austral summer of 2002. Eight days after the ice break-up, some large colonial and solitary diatom cells, known to be associated with land-fast ice and present in downward fluxes, were unable to adapt in ice-free waters, while some other solitary and short-colony forming taxa (e.g., Fragilariopsis curta, F. cylindrus) did develop. Pelagic species were becoming more abundant offshore, replacing the typical sympagic (ice-associated) taxa. Archaeomonad cysts, usually associated with sea ice, were recorded in the surface waters nearshore. Rough weather restricted the data set, but we were able to confirm that some microalgae may be reliable sea-ice indicators and that seeding by sea ice only concerns a few taxa in this coastal area of East Antarctica.

【 授权许可】

CC BY-NC