Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments
International audience 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 prese...
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Online Access: | https://hal.science/hal-03525505 https://hal.science/hal-03525505/document https://hal.science/hal-03525505/file/manuscript.v8.pdf https://doi.org/10.3390/microorganisms9122626 |
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ftccsdartic:oai:HAL:hal-03525505v1 2023-12-17T10:24:09+01:00 Use of Stress Signals of Their Attached Bacteria to Monitor Sympagic Algae Preservation in Canadian Arctic Sediments Amiraux, Rémi Bonin, Patricia Christopher, Burot Rontani, Jean-Francois Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) 2021-12 https://hal.science/hal-03525505 https://hal.science/hal-03525505/document https://hal.science/hal-03525505/file/manuscript.v8.pdf https://doi.org/10.3390/microorganisms9122626 en eng HAL CCSD MDPI info:eu-repo/semantics/altIdentifier/doi/10.3390/microorganisms9122626 hal-03525505 https://hal.science/hal-03525505 https://hal.science/hal-03525505/document https://hal.science/hal-03525505/file/manuscript.v8.pdf doi:10.3390/microorganisms9122626 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2076-2607 Microorganisms https://hal.science/hal-03525505 Microorganisms, 2021, 9 (12), pp.2626. ⟨10.3390/microorganisms9122626⟩ sympagic algae Arctic bacterial stress lipid tracers sediments preservation [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.3390/microorganisms9122626 2023-11-19T00:17:46Z International audience 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Microorganisms 9 12 2626 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
sympagic algae Arctic bacterial stress lipid tracers sediments preservation [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
sympagic algae Arctic bacterial stress lipid tracers sediments preservation [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Amiraux, Rémi Bonin, Patricia Christopher, Burot Rontani, Jean-Francois 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 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience 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. |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Amiraux, Rémi Bonin, Patricia Christopher, Burot Rontani, Jean-Francois |
author_facet |
Amiraux, Rémi Bonin, Patricia Christopher, Burot Rontani, Jean-Francois |
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 |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03525505 https://hal.science/hal-03525505/document https://hal.science/hal-03525505/file/manuscript.v8.pdf https://doi.org/10.3390/microorganisms9122626 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming Sea ice |
genre_facet |
Arctic Global warming Sea ice |
op_source |
ISSN: 2076-2607 Microorganisms https://hal.science/hal-03525505 Microorganisms, 2021, 9 (12), pp.2626. ⟨10.3390/microorganisms9122626⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/microorganisms9122626 hal-03525505 https://hal.science/hal-03525505 https://hal.science/hal-03525505/document https://hal.science/hal-03525505/file/manuscript.v8.pdf doi:10.3390/microorganisms9122626 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3390/microorganisms9122626 |
container_title |
Microorganisms |
container_volume |
9 |
container_issue |
12 |
container_start_page |
2626 |
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1785563365877219328 |