Lipids from free-floating sediment traps
During summer 1994, the production regime at 2 sites located in the Indian sector of the Southern Ocean, one in the Permanent Open Ocean Zone (POOZ) at 52° S, and a second in the Seasonal Ice Zone (SIZ) at 63° S, was dominated by regeneration (0.3 < f-ratio < 0.4). Two time series, each of abo...
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Language: | English |
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1999
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.736927 https://doi.org/10.1594/PANGAEA.736927 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.736927 2024-09-15T18:37:25+00:00 Lipids from free-floating sediment traps Cailliau, Caroline Belviso, Sauveur Goutx, Madeleine Bedo, Alain Park, Young-Hyang Charriaud, Edwige MEDIAN LATITUDE: -57.500000 * MEDIAN LONGITUDE: 66.166667 * SOUTH-BOUND LATITUDE: -63.000000 * WEST-BOUND LONGITUDE: 62.000000 * NORTH-BOUND LATITUDE: -52.000000 * EAST-BOUND LONGITUDE: 70.333333 * DATE/TIME START: 1994-02-10T00:00:00 * DATE/TIME END: 1994-02-22T08:00:00 1999 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.736927 https://doi.org/10.1594/PANGAEA.736927 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.736927 https://doi.org/10.1594/PANGAEA.736927 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Cailliau, Caroline; Belviso, Sauveur; Goutx, Madeleine; Bedo, Alain; Park, Young-Hyang; Charriaud, Edwige (1999): Sedimentation pathway in the Indian sector of the Southern Ocean during a production regime dominated by regeneration. Marine Ecology Progress Series, 190, 53-67, https://doi.org/10.3354/meps190053 ANTARES-II ANTARES-II_A01 ANTARES-II_A04 Biogeochemical Processes in the Oceans and Fluxes JGOFS Joint Global Ocean Flux Study Marion Dufresne (1972) MD78 OCE Oceanography PROOF dataset publication series 1999 ftpangaea https://doi.org/10.1594/PANGAEA.73692710.3354/meps190053 2024-07-24T02:31:20Z During summer 1994, the production regime at 2 sites located in the Indian sector of the Southern Ocean, one in the Permanent Open Ocean Zone (POOZ) at 52° S, and a second in the Seasonal Ice Zone (SIZ) at 63° S, was dominated by regeneration (0.3 < f-ratio < 0.4). Two time series, each of about 4 d, were performed over pre-determined time intervals of 4 h using a free-floating sediment trap set at 200 m at the 2 sites. Hourly variations of C, N, chlorophyll a (chl a) and its degradation products, taxon-specific pigments, lipid classes and dimethylsulfoniopropionate (DMSP) were measured simultaneously. Measurements in the water column were done during the sediment trap drifting. Fucoxanthin, a typical diatom pigment, was the major accessory pigment found in the trap material at the 2 stations, whereas, in the water column, the phytoplankton was dominated by flagellates in the POOZ and diatoms in the SIZ. This suggests selective grazing of diatoms by zooplankton and/or mass sinking of diatoms, at least in the POOZ. However, since the set of compounds exhibited strong diel cycles in the POOZ, the export flux appears to mainly result from the zooplankton. The results are ambiguous as to whether the intensified sedimentation at night resulted from vertical migration of euphausiids, since copepods crossing the pycnocline were rare, and/or the nocturnal increase of feeding activity of copepods and microzooplankton. At the SIZ, diatoms dominated in the mixed layer and at the deep phytoplankton maximum (DPM) located at the depth of the temperature minimum (50 to 100 m). However, pigment signature in the trap material suggested the selective sedimentation of nanoflagellates (essentially pelagophytes). Correspondingly, there was high proportions of sterols up to 40% in the trap material. The diel variations somewhat resembling POOZs, the low chl a-to-phaeopigments ratio and the presence of phaeopigments in their most degraded forms were strong indications of the key role played by zooplankton in the export fluxes in ... Other/Unknown Material Southern Ocean Copepods PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(62.000000,70.333333,-52.000000,-63.000000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANTARES-II ANTARES-II_A01 ANTARES-II_A04 Biogeochemical Processes in the Oceans and Fluxes JGOFS Joint Global Ocean Flux Study Marion Dufresne (1972) MD78 OCE Oceanography PROOF |
spellingShingle |
ANTARES-II ANTARES-II_A01 ANTARES-II_A04 Biogeochemical Processes in the Oceans and Fluxes JGOFS Joint Global Ocean Flux Study Marion Dufresne (1972) MD78 OCE Oceanography PROOF Cailliau, Caroline Belviso, Sauveur Goutx, Madeleine Bedo, Alain Park, Young-Hyang Charriaud, Edwige Lipids from free-floating sediment traps |
topic_facet |
ANTARES-II ANTARES-II_A01 ANTARES-II_A04 Biogeochemical Processes in the Oceans and Fluxes JGOFS Joint Global Ocean Flux Study Marion Dufresne (1972) MD78 OCE Oceanography PROOF |
description |
During summer 1994, the production regime at 2 sites located in the Indian sector of the Southern Ocean, one in the Permanent Open Ocean Zone (POOZ) at 52° S, and a second in the Seasonal Ice Zone (SIZ) at 63° S, was dominated by regeneration (0.3 < f-ratio < 0.4). Two time series, each of about 4 d, were performed over pre-determined time intervals of 4 h using a free-floating sediment trap set at 200 m at the 2 sites. Hourly variations of C, N, chlorophyll a (chl a) and its degradation products, taxon-specific pigments, lipid classes and dimethylsulfoniopropionate (DMSP) were measured simultaneously. Measurements in the water column were done during the sediment trap drifting. Fucoxanthin, a typical diatom pigment, was the major accessory pigment found in the trap material at the 2 stations, whereas, in the water column, the phytoplankton was dominated by flagellates in the POOZ and diatoms in the SIZ. This suggests selective grazing of diatoms by zooplankton and/or mass sinking of diatoms, at least in the POOZ. However, since the set of compounds exhibited strong diel cycles in the POOZ, the export flux appears to mainly result from the zooplankton. The results are ambiguous as to whether the intensified sedimentation at night resulted from vertical migration of euphausiids, since copepods crossing the pycnocline were rare, and/or the nocturnal increase of feeding activity of copepods and microzooplankton. At the SIZ, diatoms dominated in the mixed layer and at the deep phytoplankton maximum (DPM) located at the depth of the temperature minimum (50 to 100 m). However, pigment signature in the trap material suggested the selective sedimentation of nanoflagellates (essentially pelagophytes). Correspondingly, there was high proportions of sterols up to 40% in the trap material. The diel variations somewhat resembling POOZs, the low chl a-to-phaeopigments ratio and the presence of phaeopigments in their most degraded forms were strong indications of the key role played by zooplankton in the export fluxes in ... |
format |
Other/Unknown Material |
author |
Cailliau, Caroline Belviso, Sauveur Goutx, Madeleine Bedo, Alain Park, Young-Hyang Charriaud, Edwige |
author_facet |
Cailliau, Caroline Belviso, Sauveur Goutx, Madeleine Bedo, Alain Park, Young-Hyang Charriaud, Edwige |
author_sort |
Cailliau, Caroline |
title |
Lipids from free-floating sediment traps |
title_short |
Lipids from free-floating sediment traps |
title_full |
Lipids from free-floating sediment traps |
title_fullStr |
Lipids from free-floating sediment traps |
title_full_unstemmed |
Lipids from free-floating sediment traps |
title_sort |
lipids from free-floating sediment traps |
publisher |
PANGAEA |
publishDate |
1999 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.736927 https://doi.org/10.1594/PANGAEA.736927 |
op_coverage |
MEDIAN LATITUDE: -57.500000 * MEDIAN LONGITUDE: 66.166667 * SOUTH-BOUND LATITUDE: -63.000000 * WEST-BOUND LONGITUDE: 62.000000 * NORTH-BOUND LATITUDE: -52.000000 * EAST-BOUND LONGITUDE: 70.333333 * DATE/TIME START: 1994-02-10T00:00:00 * DATE/TIME END: 1994-02-22T08:00:00 |
long_lat |
ENVELOPE(62.000000,70.333333,-52.000000,-63.000000) |
genre |
Southern Ocean Copepods |
genre_facet |
Southern Ocean Copepods |
op_source |
Supplement to: Cailliau, Caroline; Belviso, Sauveur; Goutx, Madeleine; Bedo, Alain; Park, Young-Hyang; Charriaud, Edwige (1999): Sedimentation pathway in the Indian sector of the Southern Ocean during a production regime dominated by regeneration. Marine Ecology Progress Series, 190, 53-67, https://doi.org/10.3354/meps190053 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.736927 https://doi.org/10.1594/PANGAEA.736927 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.73692710.3354/meps190053 |
_version_ |
1810481796145479680 |