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)
[en] 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 5m 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 5m) and diatom abundances (6 507 - 70 274 cells.l-1 at 5m), but low diversity, dominated by Fragilariopsis spp. Lower biomasses (0.38 – 0.94 µg Chl a.l-1 at 5m) and abundances (394 – 9 058 cells.l-1 at 5m) 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 5m) and abundances (1 190 - 5 431 cells.l-1 at 5m) were lowest, coinciding with the presence of abundant herbivorous zooplankton.
Research Center/Unit :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Beans, Cristina; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Hecq, Jean-Henri ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Koubbi, Philippe; Université de Paris VI, Paris, France > Laboratoire d'Océanographie de Villefranche-sur-Mer
Vallet, Carole; Université du Littoral Côte d'Opale, France > Laboratoire d'Océanologie et de géoscience
Wrigth, Simon; Austraslian Government Antarctic Division, Australia
Goffart, Anne ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Language :
English
Title :
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)
Publication date :
2008
Journal title :
Polar Biology
ISSN :
0722-4060
eISSN :
1432-2056
Publisher :
Springer Science & Business Media B.V., New York, United States - New York
Volume :
31
Issue :
9
Pages :
1101-1117
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Pelagant, contract EV/12/30A
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
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