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Author (up) Mock, T. url  openurl
  Title In situ primary production in young Antarctic sea ice Type Journal Article
  Year 2002 Publication Hydrobiologia Abbreviated Journal Hydrobiologia  
  Volume 470 Issue 1-3 Pages 127-132  
  Keywords Sea ice; Marine ecosystems; Primary production; Algae; Epontic organisms; Light effects; Epontic environment; Temperature effects; Brines; Salinity effects; Carbon fixation; Antarctica; Weddell Sea; Psw; Ice; In-situ; 14c; Methods  
  Abstract An in situ incubation technique used successfully to measure the photosynthetic carbon assimilation of internal algal assemblages within thick multiyear Arctic ice was developed and improved to measure the photosynthetic carbon assimilation within young sea ice only 50 cm thick (Eastern Weddell Sea, Antarctica). The light transmission was improved by the construction of a cylindrical frame instead of using a transparent acrylic-glass barrel. The new device enabled some of the first precise measurements of in situ photosynthetic carbon assimilation in newly formed Antarctic sea ice, which is an important component in the sea ice ecosystem of the Antarctic Ocean. The rates of carbon assimilation of the interior algal assemblage (top to 5 cm from bottom) was 0.25 mg C m?² d?¹ whereas the bottom algal community (lowest 5 cm) attained only 0.02 mg C m?² d?¹. Chl a specific production rates (PChl) for bottom algae (0.020 – 0.056 µg C µg chl a?¹ h?¹) revealed strong light limitation, whereas the interior algae (PChl = 0.7 – 1.2 µg C µg chl a?¹ h?¹) were probably more limited by low temperatures (< -5 degree C) and high brine salinities.  
  Corporate Author Thesis  
  Publisher Kluwer Academic Publishers Place of Publication Dordrecht Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0018-8158 ISBN Medium  
  Area Expedition Conference  
  Notes Freshwater; Brackish; Marine Approved no  
  Call Number refbase @ admin @ Mock2002Hydrobiologia Serial 802  
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