Journal
POLAR RESEARCH
Volume 30, Issue -, Pages -Publisher
OPEN ACADEMIA AB
DOI: 10.3402/polar.v30i0.5910
Keywords
Ice break-up; phytoplankton; sea-ice signature; East Antarctica
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada
- Canadian Museum of Nature
- Institut Polaire Francais Paul-Emile Victor, Brest, France
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The phytoplankton onset following the spring ice break-up in Adelie 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.
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