The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean)
This study investigates the turnover of polysaccharides by heterotrophic bacterioplankton in the northern Bay of Biscay, a productive marine system on the continental margin of the temperate Atlantic Ocean. Bacterial biomass production (BBP) near the surface ranged from 0.5 to 25.7 nmol C L -1 h -1...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/124493 2023-05-15T17:34:42+02:00 The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean) Piontek, J. Händel, N. De Bodt, Caroline Harlay, Jérôme Chou, Lei Engel, Anja 2011 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/124493 https://dipot.ulb.ac.be/dspace/bitstream/2013/124493/3/doi_105884.pdf en eng uri/info:doi/10.1093/plankt/fbr069 uri/info:scp/80053554613 https://dipot.ulb.ac.be/dspace/bitstream/2013/124493/3/doi_105884.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/124493 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Journal of plankton research Environnement et pollution Océanographie physique et chimique bacterial biomass production extracellular enzymes marine bacterioplankton organic matter degradation polysaccharides info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2011 ftunivbruxelles 2022-06-12T20:50:27Z This study investigates the turnover of polysaccharides by heterotrophic bacterioplankton in the northern Bay of Biscay, a productive marine system on the continental margin of the temperate Atlantic Ocean. Bacterial biomass production (BBP) near the surface ranged from 0.5 to 25.7 nmol C L -1 h -1 during small phytoplankton blooms in May and June that occurred after the main spring bloom. A direct relationship between BBP and total polysaccharides strongly suggests the dependence of bacterial growth on the availability of semi-labile organic matter. Concentrations of combined glucose as well as rate constants of extracellular glucosidase activity and glucose uptake were determined to estimate the actual carbon fluxes from bacterial polysaccharide turnover. Results reveal that the degradation of polysaccharides in the upper 100 m of the water column sustained a glucose flux of 15.232.3 mg C m -2 d -1 that was available for bacterial consumption. The mean turnover time for polysaccharides was 170 and 165 days for α-and β-glycosidic linked polymers, respectively. Incorporation of free glucose supported 0.419.6 of BBP. The availability of nitrate plus nitrite (NO x) was identified as one factor increasing bacterial incorporation of glucose in most samples. Our results demonstrate that the bacterial recycling of polysaccharides generated a significant flux of organic carbon in microbial food-webs and biogeochemical processes. © 2011 The Author. Published by Oxford University Press. SCOPUS: ar.j SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper North Atlantic DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Environnement et pollution Océanographie physique et chimique bacterial biomass production extracellular enzymes marine bacterioplankton organic matter degradation polysaccharides |
spellingShingle |
Environnement et pollution Océanographie physique et chimique bacterial biomass production extracellular enzymes marine bacterioplankton organic matter degradation polysaccharides Piontek, J. Händel, N. De Bodt, Caroline Harlay, Jérôme Chou, Lei Engel, Anja The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean) |
topic_facet |
Environnement et pollution Océanographie physique et chimique bacterial biomass production extracellular enzymes marine bacterioplankton organic matter degradation polysaccharides |
description |
This study investigates the turnover of polysaccharides by heterotrophic bacterioplankton in the northern Bay of Biscay, a productive marine system on the continental margin of the temperate Atlantic Ocean. Bacterial biomass production (BBP) near the surface ranged from 0.5 to 25.7 nmol C L -1 h -1 during small phytoplankton blooms in May and June that occurred after the main spring bloom. A direct relationship between BBP and total polysaccharides strongly suggests the dependence of bacterial growth on the availability of semi-labile organic matter. Concentrations of combined glucose as well as rate constants of extracellular glucosidase activity and glucose uptake were determined to estimate the actual carbon fluxes from bacterial polysaccharide turnover. Results reveal that the degradation of polysaccharides in the upper 100 m of the water column sustained a glucose flux of 15.232.3 mg C m -2 d -1 that was available for bacterial consumption. The mean turnover time for polysaccharides was 170 and 165 days for α-and β-glycosidic linked polymers, respectively. Incorporation of free glucose supported 0.419.6 of BBP. The availability of nitrate plus nitrite (NO x) was identified as one factor increasing bacterial incorporation of glucose in most samples. Our results demonstrate that the bacterial recycling of polysaccharides generated a significant flux of organic carbon in microbial food-webs and biogeochemical processes. © 2011 The Author. Published by Oxford University Press. SCOPUS: ar.j SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Piontek, J. Händel, N. De Bodt, Caroline Harlay, Jérôme Chou, Lei Engel, Anja |
author_facet |
Piontek, J. Händel, N. De Bodt, Caroline Harlay, Jérôme Chou, Lei Engel, Anja |
author_sort |
Piontek, J. |
title |
The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean) |
title_short |
The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean) |
title_full |
The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean) |
title_fullStr |
The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean) |
title_full_unstemmed |
The utilization of polysaccharides by heterotrophic bacterioplankton in the Bay of Biscay (North Atlantic Ocean) |
title_sort |
utilization of polysaccharides by heterotrophic bacterioplankton in the bay of biscay (north atlantic ocean) |
publishDate |
2011 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/124493 https://dipot.ulb.ac.be/dspace/bitstream/2013/124493/3/doi_105884.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of plankton research |
op_relation |
uri/info:doi/10.1093/plankt/fbr069 uri/info:scp/80053554613 https://dipot.ulb.ac.be/dspace/bitstream/2013/124493/3/doi_105884.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/124493 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766133613010616320 |