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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ftufz:oai:ufz.de:24171 2023-12-31T10:03:21+01:00 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, C. Amiraux, R. Bonin, P. Guasco, S. Babin, M. Joux, F. Marie, D. Vilgrain, L. Heipieper, Hermann-Josef Rontani, J.-F. 2021-01-20 application/pdf https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24171 https://doi.org/10.1016/j.scitotenv.2021.145252 en eng Elsevier Science of the Total Environment 770;; art. 145252 https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24171 https://dx.doi.org/10.1016/j.scitotenv.2021.145252 info:eu-repo/semantics/closedAccess ISSN: 0048-9697 Sea ice algae Bacterial viability Salinity stress Cis-trans isomerase EPS Micro- and macro-zooplankton info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text 2021 ftufz https://doi.org/10.1016/j.scitotenv.2021.145252 2023-12-03T23:27:05Z 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. Article in Journal/Newspaper Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice Zooplankton Copepods UFZ - Publication Index (Helmholtz-Centre for Environmental Research) Science of The Total Environment 770 145252 |
institution |
Open Polar |
collection |
UFZ - Publication Index (Helmholtz-Centre for Environmental Research) |
op_collection_id |
ftufz |
language |
English |
topic |
Sea ice algae Bacterial viability Salinity stress Cis-trans isomerase EPS Micro- and macro-zooplankton |
spellingShingle |
Sea ice algae Bacterial viability Salinity stress Cis-trans isomerase EPS Micro- and macro-zooplankton Burot, C. Amiraux, R. Bonin, P. Guasco, S. Babin, M. Joux, F. Marie, D. Vilgrain, L. Heipieper, Hermann-Josef Rontani, J.-F. 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 |
Sea ice algae Bacterial viability Salinity stress Cis-trans isomerase EPS Micro- and macro-zooplankton |
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 |
Article in Journal/Newspaper |
author |
Burot, C. Amiraux, R. Bonin, P. Guasco, S. Babin, M. Joux, F. Marie, D. Vilgrain, L. Heipieper, Hermann-Josef Rontani, J.-F. |
author_facet |
Burot, C. Amiraux, R. Bonin, P. Guasco, S. Babin, M. Joux, F. Marie, D. Vilgrain, L. Heipieper, Hermann-Josef Rontani, J.-F. |
author_sort |
Burot, C. |
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 |
publishDate |
2021 |
url |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24171 https://doi.org/10.1016/j.scitotenv.2021.145252 |
genre |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice Zooplankton Copepods |
genre_facet |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice Zooplankton Copepods |
op_source |
ISSN: 0048-9697 |
op_relation |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24171 https://dx.doi.org/10.1016/j.scitotenv.2021.145252 |
op_rights |
info:eu-repo/semantics/closedAccess |
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_ |
1786820782332051456 |