Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments
Based on the strong aggregation of sympagic (ice-associated) algae and the high mortality or inactivity of bacteria attached to them, it was previously hypothesized that sympagic algae should be significant contributors to the export of carbon to Arctic sediments. In the present work, the lipid cont...
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ftarchimer:oai:archimer.ifremer.fr:85343 2023-05-15T14:35:29+02:00 Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments Amiraux, Rémi Bonin, Patricia Burot, Christopher Rontani, Jean-françois 2021-12 application/pdf https://archimer.ifremer.fr/doc/00741/85343/90382.pdf https://archimer.ifremer.fr/doc/00741/85343/90383.zip https://doi.org/10.3390/microorganisms9122626 https://archimer.ifremer.fr/doc/00741/85343/ eng eng MDPI AG https://archimer.ifremer.fr/doc/00741/85343/90382.pdf https://archimer.ifremer.fr/doc/00741/85343/90383.zip doi:10.3390/microorganisms9122626 https://archimer.ifremer.fr/doc/00741/85343/ info:eu-repo/semantics/openAccess restricted use Microorganisms (2076-2607) (MDPI AG), 2021-12 , Vol. 9 , N. 12 , P. 2626 (15p.) sympagic algae Arctic bacterial stress lipid tracers sediments preservation text Publication info:eu-repo/semantics/article 2021 ftarchimer https://doi.org/10.3390/microorganisms9122626 2022-01-18T23:50:47Z Based on the strong aggregation of sympagic (ice-associated) algae and the high mortality or inactivity of bacteria attached to them, it was previously hypothesized that sympagic algae should be significant contributors to the export of carbon to Arctic sediments. In the present work, the lipid content of 30 sediment samples collected in the Canadian Arctic was investigated to test this hypothesis. The detection of high proportions of trans vaccenic fatty acid (resulting from cis-trans isomerase (CTI) activity of bacteria under hypersaline conditions) and 10S-hydroxyhexadec-8(trans)-enoic acid (resulting from 10S-DOX bacterial detoxification activity in the presence of deleterious free palmitoleic acid) confirmed: (i) the strong contribution of sympagic material to some Arctic sediments, and (ii) the impaired physiological status of its associated bacterial communities. Unlike terrestrial material, sympagic algae that had escaped zooplanktonic grazing appeared relatively preserved from biotic degradation in Arctic sediments. The expected reduction in sea ice cover resulting from global warming should cause a shift in the relative contributions of ice-associated vs. pelagic algae to the seafloor, and thus to a strong modification of the carbon cycle Article in Journal/Newspaper Arctic Global warming Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Microorganisms 9 12 2626 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
sympagic algae Arctic bacterial stress lipid tracers sediments preservation |
spellingShingle |
sympagic algae Arctic bacterial stress lipid tracers sediments preservation Amiraux, Rémi Bonin, Patricia Burot, Christopher Rontani, Jean-françois Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments |
topic_facet |
sympagic algae Arctic bacterial stress lipid tracers sediments preservation |
description |
Based on the strong aggregation of sympagic (ice-associated) algae and the high mortality or inactivity of bacteria attached to them, it was previously hypothesized that sympagic algae should be significant contributors to the export of carbon to Arctic sediments. In the present work, the lipid content of 30 sediment samples collected in the Canadian Arctic was investigated to test this hypothesis. The detection of high proportions of trans vaccenic fatty acid (resulting from cis-trans isomerase (CTI) activity of bacteria under hypersaline conditions) and 10S-hydroxyhexadec-8(trans)-enoic acid (resulting from 10S-DOX bacterial detoxification activity in the presence of deleterious free palmitoleic acid) confirmed: (i) the strong contribution of sympagic material to some Arctic sediments, and (ii) the impaired physiological status of its associated bacterial communities. Unlike terrestrial material, sympagic algae that had escaped zooplanktonic grazing appeared relatively preserved from biotic degradation in Arctic sediments. The expected reduction in sea ice cover resulting from global warming should cause a shift in the relative contributions of ice-associated vs. pelagic algae to the seafloor, and thus to a strong modification of the carbon cycle |
format |
Article in Journal/Newspaper |
author |
Amiraux, Rémi Bonin, Patricia Burot, Christopher Rontani, Jean-françois |
author_facet |
Amiraux, Rémi Bonin, Patricia Burot, Christopher Rontani, Jean-françois |
author_sort |
Amiraux, Rémi |
title |
Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments |
title_short |
Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments |
title_full |
Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments |
title_fullStr |
Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments |
title_full_unstemmed |
Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments |
title_sort |
use of stress signals of their attached bacteria to monitor sympagic algae preservation in canadian arctic sediments |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://archimer.ifremer.fr/doc/00741/85343/90382.pdf https://archimer.ifremer.fr/doc/00741/85343/90383.zip https://doi.org/10.3390/microorganisms9122626 https://archimer.ifremer.fr/doc/00741/85343/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming Sea ice |
genre_facet |
Arctic Global warming Sea ice |
op_source |
Microorganisms (2076-2607) (MDPI AG), 2021-12 , Vol. 9 , N. 12 , P. 2626 (15p.) |
op_relation |
https://archimer.ifremer.fr/doc/00741/85343/90382.pdf https://archimer.ifremer.fr/doc/00741/85343/90383.zip doi:10.3390/microorganisms9122626 https://archimer.ifremer.fr/doc/00741/85343/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3390/microorganisms9122626 |
container_title |
Microorganisms |
container_volume |
9 |
container_issue |
12 |
container_start_page |
2626 |
_version_ |
1766308306474762240 |