Polar Biology

, Volume 31, Issue 9, pp 1101–1117

A study of the diatom-dominated microplankton summer assemblages in coastal waters from Terre Adélie to the Mertz Glacier, East Antarctica (139°E–145°E)

  • C. Beans
  • J. H. Hecq
  • P. Koubbi
  • C. Vallet
  • S. Wright
  • A. Goffart
Original Paper

DOI: 10.1007/s00300-008-0452-x

Cite this article as:
Beans, C., Hecq, J.H., Koubbi, P. et al. Polar Biol (2008) 31: 1101. doi:10.1007/s00300-008-0452-x

Abstract

In January 2004 the microplankton community from the coastal waters of Terre Adélie and Georges V Land (139°E–145°E) was studied. Results showed a diatom-dominated bloom with chlorophyll a levels averaging 0.64 μg l−1 at 5 m depth (range 0.21–1.57 μg l−1). Three geographic assemblages of diatoms were identified, based on principal diatom taxa abundances. The stratified waters near the Mertz Glacier presented highest phytoplankton biomasses (0.28–1.57 μg Chl a l−1 at 5 m) and diatom abundances (6,507–70,274 cells l−1 at 5 m), but low diversity, dominated by Fragilariopsis spp. Lower biomasses (0.38–0.94 μg Chl a l−1 at 5 m) and abundances (394–9,058 cells l−1 at 5 m) were observed in the mixed waters around the Astrolabe Glacier with a diverse diatom community characterised by larger species Corethron pennatum and Rhizosolenia spp. Finally an intermediate zone between them over the shallower shelf waters of the Adélie Bank represented by Chaetoceros criophilus, where biomasses (0.21–0.35 μg Chl a l−1 at 5 m) and abundances (1,190–5,431 cells l−1 at 5 m) were lowest, coinciding with the presence of abundant herbivorous zooplankton.

Keywords

East Antarctica Terre Adélie Phytoplankton Diatoms 

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • C. Beans
    • 1
  • J. H. Hecq
    • 1
  • P. Koubbi
    • 2
  • C. Vallet
    • 3
    • 4
  • S. Wright
    • 5
  • A. Goffart
    • 1
  1. 1.Laboratoire d’Océanologie, Mare CenterUniversité de LiègeLiègeBelgium
  2. 2.Laboratoire d’Océanographie de VillefrancheUniversité Paris VI. CNRSVillefranche sur merFrance
  3. 3.Centre IUFM Nord-Pas de CalaisUniversité d’ArtoisOutreauFrance
  4. 4.Laboratoire d’Océanologie et de GéosciencesUniversité du Littoral Côte d’Opale, CNRS, UMRWimereuxFrance
  5. 5.Australian Government Antarctic Division and Antarctic Climate and Ecosystems Cooperative Research CentreChannel HighwayTASAustralia

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