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Author Thomas, D.N.; Lara, R.J.; Haas, C.; Schnack-Schiel, S.B.; Dieckmann, G.S.; Kattner, G.; Nöthig, E.-M.; Mizdalski, E.
Title Biological soup within decaying summer sea ice in the Amundsen Sea, Antarctica Type Book Chapter
Year 1998 Publication Antarctic sea ice: Biological processes, interactions and variability Abbreviated Journal
Volume Issue Pages 161-171
Keywords Marine biology; Algae; Ice composition; Pack ice; Decomposition; Ecology; Nutrient cycle; Antarctica; Amundsen Sea
Abstract In late February 1994, during the ANT XI/3 expedition of R/V Polarstern, ice cores from perennial sea ice were sampled in the Amundsen Sea in areas of dense pack ice. The ice was largely rotten, and a conspicuous feature was the occurrence of thick gaps and voids, often filled with a dark brown slush comprised of loose ice chunks and crystals. These interior ice assemblages were at depths between 1.0 and 1.5 m in 3 to 4 m thick ice floes, and had remarkably rich interior ice algal assemblages (<= 377 µg Chl a L?¹) which were in turn a food source for unusually large numbers of foraminifers (<= 1262 individuals L?¹), the calanoid copepod Stephos longipes (<= 163 individuals L?¹) and harpacticoid copepods (<= 168 individuals L?¹). Analysis of inorganic nutrients (nitrate, phosphate, ammonium, nitrite, and silicate) and dissolved organic carbon (DOC) showed that these were sites of high nutrient supply coupled with high rates of nutrient regeneration.
Corporate Author Thesis
Publisher American Geophysical Union Place of Publication Washington, DC Editor Lizotte, M.P.; Arrigo, K.R.
Language Summary Language Original Title
Series Editor Series Title Antarctic Research Series Abbreviated Series Title
Series Volume 73 Series Issue Edition
ISSN ISBN 0-87590-901-9 Medium
Area Expedition Conference
Notes (up) Approved no
Call Number refbase @ admin @ Thomas++1998 Serial 764
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