The molecular distribution of combined aldoses in sinking particles in various oceanic conditions
International audience Sinking particles were collected from different marine locations in the Southern Indian Ocean, Mediterranean Sea, and the upwelling (UPW) zone of Agadir Morocco using free-floating sediment traps set from 50 to 300 m. Aldose composition was determined using high-performance an...
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ftunivaixmarseil:oai:HAL:hal-04688929v1 2024-10-06T13:52:58+00:00 The molecular distribution of combined aldoses in sinking particles in various oceanic conditions Panagiotopoulos, Christos Sempéré, Richard Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM) Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS) 2004 https://hal.science/hal-04688929 https://hal.science/hal-04688929/document https://hal.science/hal-04688929/file/Pana%20%26%20Sempere%202005.pdf https://doi.org/10.1016/j.marchem.2004.07.005 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marchem.2004.07.005 hal-04688929 https://hal.science/hal-04688929 https://hal.science/hal-04688929/document https://hal.science/hal-04688929/file/Pana%20%26%20Sempere%202005.pdf doi:10.1016/j.marchem.2004.07.005 info:eu-repo/semantics/OpenAccess ISSN: 0304-4203 Marine Chemistry https://hal.science/hal-04688929 Marine Chemistry, 2004, 95 (1-2), pp.31-49. ⟨10.1016/j.marchem.2004.07.005⟩ Sinking particles Southern Indian Ocean Mediterranean Sea Morocco upwelling Monosaccharides C:N ratios PCHO-C yields [CHIM.OTHE]Chemical Sciences/Other [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2004 ftunivaixmarseil https://doi.org/10.1016/j.marchem.2004.07.005 2024-09-12T00:14:45Z International audience Sinking particles were collected from different marine locations in the Southern Indian Ocean, Mediterranean Sea, and the upwelling (UPW) zone of Agadir Morocco using free-floating sediment traps set from 50 to 300 m. Aldose composition was determined using high-performance anion-exchange chromatography with pulsed amperometric detection following hydrolysis in 0.1 M HCl. Carbohydrate yields (PCHO-C/POC%) and C:N ratios were higher in the Mediterranean Sea samples (PCHO-C/ POC=12.9F8.4%; C:N ratios=8.3F1.6; n=11) than in samples from the Southern Indian Ocean (PCHO-C/POC=3.6F0.94%; C:N ratios=5.7F0.59, n=7), indicating compositional differences in the bulk and sugar content of the collected particles. The molecular composition revealed that glucose was the most abundant monosaccharide in the Mediterranean Sea and upwelling zone samples (22-51 wt.% of the total aldoses), whereas ribose (17-39 wt.%) and galactose (10-27 wt.%) were the predominant aldoses in the Southern Indian Ocean samples. Similarly, deoxysugars (fucose+rhamnose) calculated on glucosefree basis were more abundant in particles from the Mediterranean Sea (18.8F5.6 wt.%, n=12) than those from the Southern Ocean samples (8.4F3.5 wt.%, n=7). These results suggest a non-uniform chemical composition of upper ocean sinking particles among oceanic provinces in terms of carbon, nitrogen, and sugar content. Such differences might be due to various biological species encountered in surface waters and/or to different status of degradation of recently produced sinking particles between Southern Ocean and Mediterranean Sea during the sampling periods. These results suggest that both high PCHO-C yields and high relative abundance of glucose do not necessarily reflect the presence of fresh material as hitherto assumed. A more extensive study at the molecular level is necessary in order to understand the distribution of sugars in different oceanic regimes. Article in Journal/Newspaper Southern Ocean Aix-Marseille Université: HAL Indian Southern Ocean Marine Chemistry 95 1-2 31 49 |
institution |
Open Polar |
collection |
Aix-Marseille Université: HAL |
op_collection_id |
ftunivaixmarseil |
language |
English |
topic |
Sinking particles Southern Indian Ocean Mediterranean Sea Morocco upwelling Monosaccharides C:N ratios PCHO-C yields [CHIM.OTHE]Chemical Sciences/Other [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Sinking particles Southern Indian Ocean Mediterranean Sea Morocco upwelling Monosaccharides C:N ratios PCHO-C yields [CHIM.OTHE]Chemical Sciences/Other [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Panagiotopoulos, Christos Sempéré, Richard The molecular distribution of combined aldoses in sinking particles in various oceanic conditions |
topic_facet |
Sinking particles Southern Indian Ocean Mediterranean Sea Morocco upwelling Monosaccharides C:N ratios PCHO-C yields [CHIM.OTHE]Chemical Sciences/Other [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Sinking particles were collected from different marine locations in the Southern Indian Ocean, Mediterranean Sea, and the upwelling (UPW) zone of Agadir Morocco using free-floating sediment traps set from 50 to 300 m. Aldose composition was determined using high-performance anion-exchange chromatography with pulsed amperometric detection following hydrolysis in 0.1 M HCl. Carbohydrate yields (PCHO-C/POC%) and C:N ratios were higher in the Mediterranean Sea samples (PCHO-C/ POC=12.9F8.4%; C:N ratios=8.3F1.6; n=11) than in samples from the Southern Indian Ocean (PCHO-C/POC=3.6F0.94%; C:N ratios=5.7F0.59, n=7), indicating compositional differences in the bulk and sugar content of the collected particles. The molecular composition revealed that glucose was the most abundant monosaccharide in the Mediterranean Sea and upwelling zone samples (22-51 wt.% of the total aldoses), whereas ribose (17-39 wt.%) and galactose (10-27 wt.%) were the predominant aldoses in the Southern Indian Ocean samples. Similarly, deoxysugars (fucose+rhamnose) calculated on glucosefree basis were more abundant in particles from the Mediterranean Sea (18.8F5.6 wt.%, n=12) than those from the Southern Ocean samples (8.4F3.5 wt.%, n=7). These results suggest a non-uniform chemical composition of upper ocean sinking particles among oceanic provinces in terms of carbon, nitrogen, and sugar content. Such differences might be due to various biological species encountered in surface waters and/or to different status of degradation of recently produced sinking particles between Southern Ocean and Mediterranean Sea during the sampling periods. These results suggest that both high PCHO-C yields and high relative abundance of glucose do not necessarily reflect the presence of fresh material as hitherto assumed. A more extensive study at the molecular level is necessary in order to understand the distribution of sugars in different oceanic regimes. |
author2 |
Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM) Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Panagiotopoulos, Christos Sempéré, Richard |
author_facet |
Panagiotopoulos, Christos Sempéré, Richard |
author_sort |
Panagiotopoulos, Christos |
title |
The molecular distribution of combined aldoses in sinking particles in various oceanic conditions |
title_short |
The molecular distribution of combined aldoses in sinking particles in various oceanic conditions |
title_full |
The molecular distribution of combined aldoses in sinking particles in various oceanic conditions |
title_fullStr |
The molecular distribution of combined aldoses in sinking particles in various oceanic conditions |
title_full_unstemmed |
The molecular distribution of combined aldoses in sinking particles in various oceanic conditions |
title_sort |
molecular distribution of combined aldoses in sinking particles in various oceanic conditions |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-04688929 https://hal.science/hal-04688929/document https://hal.science/hal-04688929/file/Pana%20%26%20Sempere%202005.pdf https://doi.org/10.1016/j.marchem.2004.07.005 |
geographic |
Indian Southern Ocean |
geographic_facet |
Indian Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0304-4203 Marine Chemistry https://hal.science/hal-04688929 Marine Chemistry, 2004, 95 (1-2), pp.31-49. ⟨10.1016/j.marchem.2004.07.005⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marchem.2004.07.005 hal-04688929 https://hal.science/hal-04688929 https://hal.science/hal-04688929/document https://hal.science/hal-04688929/file/Pana%20%26%20Sempere%202005.pdf doi:10.1016/j.marchem.2004.07.005 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.marchem.2004.07.005 |
container_title |
Marine Chemistry |
container_volume |
95 |
container_issue |
1-2 |
container_start_page |
31 |
op_container_end_page |
49 |
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1812181574643351552 |