Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay
Carbohydrates comprise a large fraction (~30 %) of organic matter in the ocean (Pakulski and Benner, 1994). The production of polysaccarides (CCHO) in seawater is mainly linked to autotrophic processes. CCHO serve as structural and storage compounds, or are released by exudation, cell lysis or leaka...
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ftoceanrep:oai:oceanrep.geomar.de:12340 2023-05-15T17:50:17+02:00 Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay Händel, N. Piontek, J. Harlay, J. De Bodt, C. Chou, L. Engel, Anja 2009 https://oceanrep.geomar.de/id/eprint/12340/ unknown Händel, N., Piontek, J., Harlay, J., De Bodt, C., Chou, L. and Engel, A. (2009) Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay. [Poster] In: ASLO Aquatic Sciences Meeting 2009. , 25.-30.01.2009, Nice, France . info:eu-repo/semantics/closedAccess Conference or Workshop Item NonPeerReviewed 2009 ftoceanrep 2023-04-07T15:00:40Z Carbohydrates comprise a large fraction (~30 %) of organic matter in the ocean (Pakulski and Benner, 1994). The production of polysaccarides (CCHO) in seawater is mainly linked to autotrophic processes. CCHO serve as structural and storage compounds, or are released by exudation, cell lysis or leakage to the dissolved organic matter pool. Concentrations of total hydrolyzable neutral sugars range from 200-800nM and 20-170nM in surface and deep waters, respectively (Benner, 2002). It has been shown that CCHO, in particular acidic polysaccharides, are involved in aggregation processes, e.g. the formation of transparent exopolymer particles (TEP). Recently, it has been suggested that ocean acidification increases TEP production, and therefore potentially enhances particle aggregation (Engel 2002, Mari 2008). Here, we present data on the abundance and composition of neutral and acidic CCHO and on TEP, obtained from field investigations and from CO2-controlled chemostat experiments that were conducted during a coccolithophore bloom in the Bay of Biscay 2006. Based on our findings, we discuss the partitioning of CCHO into gel particles, potential effects of ocean acidification and related consequences for organic matter export. Conference Object Ocean acidification OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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Carbohydrates comprise a large fraction (~30 %) of organic matter in the ocean (Pakulski and Benner, 1994). The production of polysaccarides (CCHO) in seawater is mainly linked to autotrophic processes. CCHO serve as structural and storage compounds, or are released by exudation, cell lysis or leakage to the dissolved organic matter pool. Concentrations of total hydrolyzable neutral sugars range from 200-800nM and 20-170nM in surface and deep waters, respectively (Benner, 2002). It has been shown that CCHO, in particular acidic polysaccharides, are involved in aggregation processes, e.g. the formation of transparent exopolymer particles (TEP). Recently, it has been suggested that ocean acidification increases TEP production, and therefore potentially enhances particle aggregation (Engel 2002, Mari 2008). Here, we present data on the abundance and composition of neutral and acidic CCHO and on TEP, obtained from field investigations and from CO2-controlled chemostat experiments that were conducted during a coccolithophore bloom in the Bay of Biscay 2006. Based on our findings, we discuss the partitioning of CCHO into gel particles, potential effects of ocean acidification and related consequences for organic matter export. |
format |
Conference Object |
author |
Händel, N. Piontek, J. Harlay, J. De Bodt, C. Chou, L. Engel, Anja |
spellingShingle |
Händel, N. Piontek, J. Harlay, J. De Bodt, C. Chou, L. Engel, Anja Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay |
author_facet |
Händel, N. Piontek, J. Harlay, J. De Bodt, C. Chou, L. Engel, Anja |
author_sort |
Händel, N. |
title |
Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay |
title_short |
Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay |
title_full |
Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay |
title_fullStr |
Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay |
title_full_unstemmed |
Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay |
title_sort |
dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the bay of biscay |
publishDate |
2009 |
url |
https://oceanrep.geomar.de/id/eprint/12340/ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Händel, N., Piontek, J., Harlay, J., De Bodt, C., Chou, L. and Engel, A. (2009) Dynamics of polysaccharides and transparent exopolymer particles during a coccolithophore bloom in the Bay of Biscay. [Poster] In: ASLO Aquatic Sciences Meeting 2009. , 25.-30.01.2009, Nice, France . |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1766156991025119232 |