Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean)
In the framework of the GreenEdge Project (whose the general objective is to understand the dynamic of the phytoplankton spring bloom in Arctic Ocean), lipid composition and viability and stress state of bacteria were monitored in sea ice and suspended particulate matter (SPM) samples collected in 2...
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Online Access: | https://doi.org/10.1016/j.scitotenv.2021.145252 https://archimer.ifremer.fr/doc/00676/78766/80941.pdf https://archimer.ifremer.fr/doc/00676/78766/ |
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fttriple:oai:gotriple.eu:10670/1.qii5zn 2023-05-15T14:54:29+02:00 Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean) Burot, Christopher Amiraux, Rémi Bonin, Patricia Guasco, Sophie Babin, Marcel Joux, Fabien Marie, Dominique Vilgrain, Laure Heipieper, Hermann Rontani, Jean-françois https://doi.org/10.1016/j.scitotenv.2021.145252 https://archimer.ifremer.fr/doc/00676/78766/80941.pdf https://archimer.ifremer.fr/doc/00676/78766/ en eng Elsevier BV doi:10.1016/j.scitotenv.2021.145252 10670/1.qii5zn https://archimer.ifremer.fr/doc/00676/78766/80941.pdf https://archimer.ifremer.fr/doc/00676/78766/ other Archimer, archive institutionnelle de l'Ifremer Science Of The Total Environment (0048-9697) (Elsevier BV), 2021-05 , Vol. 770 , P. 145252 (13p.) envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1016/j.scitotenv.2021.145252 2023-01-22T16:44:53Z In the framework of the GreenEdge Project (whose the general objective is to understand the dynamic of the phytoplankton spring bloom in Arctic Ocean), lipid composition and viability and stress state of bacteria were monitored in sea ice and suspended particulate matter (SPM) samples collected in 2016 along a transect from sea ice to open water in Baffin Bay (Arctic Ocean). Lipid analyses confirmed the dominance of diatoms in the bottommost layer of ice and suggested (i) the presence of a strong proportion of micro-zooplankton in SPM samples collected at the western ice covered St 403 and St 409 and (ii) a high proportion of macro-zooplankton (copepods) in SPM samples collected at the eastern ice covered St 413 and open water St 418. The use of the propidium monoazide (PMA) method allowed to show a high bacterial mortality in sea ice and in SPM material collected in shallower waters at St 409 and St 418. This mortality was attributed to the release of bactericidal free fatty acids by sympagic diatoms under the effect of light stress. A strong cis-trans isomerization of bacterial MUFAs was observed in the deeper SPM samples collected at the St 403 and St 409. It was attributed to the ingestion of bacteria stressed by salinity in brine channels of ice by sympagic bacterivorous microzooplankton (ciliates) incorporating trans fatty acids of their preys before to be released in the water column during melting. The high trans/cis ratios also observed in SPM samples collected in the shallower waters at St 413 and St 418 suggest the presence of positively or neutrally buoyant extracellular polymeric substances (EPS)-rich particles retained in sea ice and discharged (with bacteria stressed by salinity) in seawater after the initial release of algal biomass. Such EPS particles, which are generally considered as ideal vectors for bacterial horizontal distribution in the Arctic, appeared to contain a high proportion of dead and non-growing bacteria. Text Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Phytoplankton Sea ice Zooplankton Copepods Unknown Arctic Arctic Ocean Baffin Bay Science of The Total Environment 770 145252 |
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English |
topic |
envir geo |
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envir geo Burot, Christopher Amiraux, Rémi Bonin, Patricia Guasco, Sophie Babin, Marcel Joux, Fabien Marie, Dominique Vilgrain, Laure Heipieper, Hermann Rontani, Jean-françois Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean) |
topic_facet |
envir geo |
description |
In the framework of the GreenEdge Project (whose the general objective is to understand the dynamic of the phytoplankton spring bloom in Arctic Ocean), lipid composition and viability and stress state of bacteria were monitored in sea ice and suspended particulate matter (SPM) samples collected in 2016 along a transect from sea ice to open water in Baffin Bay (Arctic Ocean). Lipid analyses confirmed the dominance of diatoms in the bottommost layer of ice and suggested (i) the presence of a strong proportion of micro-zooplankton in SPM samples collected at the western ice covered St 403 and St 409 and (ii) a high proportion of macro-zooplankton (copepods) in SPM samples collected at the eastern ice covered St 413 and open water St 418. The use of the propidium monoazide (PMA) method allowed to show a high bacterial mortality in sea ice and in SPM material collected in shallower waters at St 409 and St 418. This mortality was attributed to the release of bactericidal free fatty acids by sympagic diatoms under the effect of light stress. A strong cis-trans isomerization of bacterial MUFAs was observed in the deeper SPM samples collected at the St 403 and St 409. It was attributed to the ingestion of bacteria stressed by salinity in brine channels of ice by sympagic bacterivorous microzooplankton (ciliates) incorporating trans fatty acids of their preys before to be released in the water column during melting. The high trans/cis ratios also observed in SPM samples collected in the shallower waters at St 413 and St 418 suggest the presence of positively or neutrally buoyant extracellular polymeric substances (EPS)-rich particles retained in sea ice and discharged (with bacteria stressed by salinity) in seawater after the initial release of algal biomass. Such EPS particles, which are generally considered as ideal vectors for bacterial horizontal distribution in the Arctic, appeared to contain a high proportion of dead and non-growing bacteria. |
format |
Text |
author |
Burot, Christopher Amiraux, Rémi Bonin, Patricia Guasco, Sophie Babin, Marcel Joux, Fabien Marie, Dominique Vilgrain, Laure Heipieper, Hermann Rontani, Jean-françois |
author_facet |
Burot, Christopher Amiraux, Rémi Bonin, Patricia Guasco, Sophie Babin, Marcel Joux, Fabien Marie, Dominique Vilgrain, Laure Heipieper, Hermann Rontani, Jean-françois |
author_sort |
Burot, Christopher |
title |
Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean) |
title_short |
Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean) |
title_full |
Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean) |
title_fullStr |
Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean) |
title_full_unstemmed |
Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean) |
title_sort |
viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in baffin bay (arctic ocean) |
publisher |
Elsevier BV |
url |
https://doi.org/10.1016/j.scitotenv.2021.145252 https://archimer.ifremer.fr/doc/00676/78766/80941.pdf https://archimer.ifremer.fr/doc/00676/78766/ |
geographic |
Arctic Arctic Ocean Baffin Bay |
geographic_facet |
Arctic Arctic Ocean Baffin Bay |
genre |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Phytoplankton Sea ice Zooplankton Copepods |
genre_facet |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Phytoplankton Sea ice Zooplankton Copepods |
op_source |
Archimer, archive institutionnelle de l'Ifremer Science Of The Total Environment (0048-9697) (Elsevier BV), 2021-05 , Vol. 770 , P. 145252 (13p.) |
op_relation |
doi:10.1016/j.scitotenv.2021.145252 10670/1.qii5zn https://archimer.ifremer.fr/doc/00676/78766/80941.pdf https://archimer.ifremer.fr/doc/00676/78766/ |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.scitotenv.2021.145252 |
container_title |
Science of The Total Environment |
container_volume |
770 |
container_start_page |
145252 |
_version_ |
1766326208821198848 |