Chemotaxonomic analysis of phytoplankton distribution in the Indian sector of the Southern Ocean during late austral summer
An analysis of chlorophyll alpha and of taxon-specific pigments, as measured by High Performance Liquid Chromatography (HPLC), revealed the abundance, composition and fate of phytoplankton in the Indian sector of the Southern Ocean, during the late austral summer of 1994 (ANTARES 2 cruise). In the s...
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ftarchimer:oai:archimer.ifremer.fr:20430 2023-05-15T13:47:21+02:00 Chemotaxonomic analysis of phytoplankton distribution in the Indian sector of the Southern Ocean during late austral summer Cailliau, C Claustre, H Giannino, S 1997 application/pdf https://archimer.ifremer.fr/doc/00093/20430/18097.pdf https://archimer.ifremer.fr/doc/00093/20430/ eng eng Gauthier-Villars https://archimer.ifremer.fr/doc/00093/20430/18097.pdf https://archimer.ifremer.fr/doc/00093/20430/ info:eu-repo/semantics/openAccess restricted use Oceanolica Acta (0399-1784) (Gauthier-Villars), 1997 , Vol. 20 , N. 5 , P. 721-732 text Publication info:eu-repo/semantics/article 1997 ftarchimer 2021-09-23T20:21:09Z An analysis of chlorophyll alpha and of taxon-specific pigments, as measured by High Performance Liquid Chromatography (HPLC), revealed the abundance, composition and fate of phytoplankton in the Indian sector of the Southern Ocean, during the late austral summer of 1994 (ANTARES 2 cruise). In the study area (49 degrees S-67 degrees S, 62 degrees E), four different sub-systems are presented from south to north: the Coastal and Continental Shelf Zone (CCSZ), the Seasonal Ice Zone (SIZ), including the Antarctic Divergence (AD), the Permanent Open Ocean Zone (POOZ) and a frontal system, the Polar Frontal Zone (PFZ). The phytoplankton biomass was low everywhere, never exceeding 0.45 mg Chl alpha m(-3). The highest biomass was found in the CCSZ, in the AD and in the PFZ. Diatoms were the dominant phytoplankton in the CCSZ, in the SIZ and in the AD; nanoflagellates dominated in the POOZ and in the PFZ. An analysis of physical and chemical factors indicated their influence on phytoplankton abundance, composition and fate. Thus, a high diatom biomass was found in areas where silicic acid was most abundant and where the euphotic zone was deeper than the wind-mixed layer. According to the concentrations of chlorophyll alpha and its degradation products (phaeopigments) in the water and in sediment traps (200 m), grazing pressure appeared to differ between south and north. The export rate was generally low, less than 0.3 % per day, and was maximum at the AD and in the CCSZ. A relationship appears to exist between the autotrophic biomass structure and the resulting flux of particulate organic material out of the photic zone, i.e. the diatom-dominated system (CCSZ and SIZ) exported more than the nanoflagellate-dominated system (PFZ). Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Austral Indian Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
An analysis of chlorophyll alpha and of taxon-specific pigments, as measured by High Performance Liquid Chromatography (HPLC), revealed the abundance, composition and fate of phytoplankton in the Indian sector of the Southern Ocean, during the late austral summer of 1994 (ANTARES 2 cruise). In the study area (49 degrees S-67 degrees S, 62 degrees E), four different sub-systems are presented from south to north: the Coastal and Continental Shelf Zone (CCSZ), the Seasonal Ice Zone (SIZ), including the Antarctic Divergence (AD), the Permanent Open Ocean Zone (POOZ) and a frontal system, the Polar Frontal Zone (PFZ). The phytoplankton biomass was low everywhere, never exceeding 0.45 mg Chl alpha m(-3). The highest biomass was found in the CCSZ, in the AD and in the PFZ. Diatoms were the dominant phytoplankton in the CCSZ, in the SIZ and in the AD; nanoflagellates dominated in the POOZ and in the PFZ. An analysis of physical and chemical factors indicated their influence on phytoplankton abundance, composition and fate. Thus, a high diatom biomass was found in areas where silicic acid was most abundant and where the euphotic zone was deeper than the wind-mixed layer. According to the concentrations of chlorophyll alpha and its degradation products (phaeopigments) in the water and in sediment traps (200 m), grazing pressure appeared to differ between south and north. The export rate was generally low, less than 0.3 % per day, and was maximum at the AD and in the CCSZ. A relationship appears to exist between the autotrophic biomass structure and the resulting flux of particulate organic material out of the photic zone, i.e. the diatom-dominated system (CCSZ and SIZ) exported more than the nanoflagellate-dominated system (PFZ). |
format |
Article in Journal/Newspaper |
author |
Cailliau, C Claustre, H Giannino, S |
spellingShingle |
Cailliau, C Claustre, H Giannino, S Chemotaxonomic analysis of phytoplankton distribution in the Indian sector of the Southern Ocean during late austral summer |
author_facet |
Cailliau, C Claustre, H Giannino, S |
author_sort |
Cailliau, C |
title |
Chemotaxonomic analysis of phytoplankton distribution in the Indian sector of the Southern Ocean during late austral summer |
title_short |
Chemotaxonomic analysis of phytoplankton distribution in the Indian sector of the Southern Ocean during late austral summer |
title_full |
Chemotaxonomic analysis of phytoplankton distribution in the Indian sector of the Southern Ocean during late austral summer |
title_fullStr |
Chemotaxonomic analysis of phytoplankton distribution in the Indian sector of the Southern Ocean during late austral summer |
title_full_unstemmed |
Chemotaxonomic analysis of phytoplankton distribution in the Indian sector of the Southern Ocean during late austral summer |
title_sort |
chemotaxonomic analysis of phytoplankton distribution in the indian sector of the southern ocean during late austral summer |
publisher |
Gauthier-Villars |
publishDate |
1997 |
url |
https://archimer.ifremer.fr/doc/00093/20430/18097.pdf https://archimer.ifremer.fr/doc/00093/20430/ |
geographic |
Antarctic Austral Indian Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Indian Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Oceanolica Acta (0399-1784) (Gauthier-Villars), 1997 , Vol. 20 , N. 5 , P. 721-732 |
op_relation |
https://archimer.ifremer.fr/doc/00093/20430/18097.pdf https://archimer.ifremer.fr/doc/00093/20430/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
_version_ |
1766246961889935360 |