Sustained productivity and respiration of degrading kelp detritus in the shallow benthos: Detached or broken, but not dead
International audience Temperate kelp forests contribute significantly to marine primary productivity and fuel many benthic and pelagic food chains. A large proportion of biomass is exported from kelp forests as detritus into recipient marine ecosystems, potentially contributing to Blue Carbon seque...
Published in: | Marine Environmental Research |
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2021
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Online Access: | https://hal.archives-ouvertes.fr/hal-03184625 https://hal.archives-ouvertes.fr/hal-03184625/document https://hal.archives-ouvertes.fr/hal-03184625/file/Frontier%20%26%20de%20Bettignies,%202021-MER%20pre-proof.pdf https://doi.org/10.1016/j.marenvres.2021.105277 |
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ftccsdartic:oai:HAL:hal-03184625v1 2023-05-15T17:38:23+02:00 Sustained productivity and respiration of degrading kelp detritus in the shallow benthos: Detached or broken, but not dead Frontier, Nadia de Bettignies, Florian Foggo, Andy Davoult, Dominique Adaptation et diversité en milieu marin (AD2M) Station biologique de Roscoff (SBR) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2021-04 https://hal.archives-ouvertes.fr/hal-03184625 https://hal.archives-ouvertes.fr/hal-03184625/document https://hal.archives-ouvertes.fr/hal-03184625/file/Frontier%20%26%20de%20Bettignies,%202021-MER%20pre-proof.pdf https://doi.org/10.1016/j.marenvres.2021.105277 en eng HAL CCSD Elsevier science info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marenvres.2021.105277 hal-03184625 https://hal.archives-ouvertes.fr/hal-03184625 https://hal.archives-ouvertes.fr/hal-03184625/document https://hal.archives-ouvertes.fr/hal-03184625/file/Frontier%20%26%20de%20Bettignies,%202021-MER%20pre-proof.pdf doi:10.1016/j.marenvres.2021.105277 info:eu-repo/semantics/OpenAccess ISSN: 0141-1136 EISSN: 1879-0291 Marine Environmental Research https://hal.archives-ouvertes.fr/hal-03184625 Marine Environmental Research, Elsevier science, 2021, 166, pp.105277. ⟨10.1016/j.marenvres.2021.105277⟩ Climate change Detritus North East Atlantic Oxygen production PAM fluorescence Respiration Trophic transfer [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1016/j.marenvres.2021.105277 2021-12-19T00:20:41Z International audience Temperate kelp forests contribute significantly to marine primary productivity and fuel many benthic and pelagic food chains. A large proportion of biomass is exported from kelp forests as detritus into recipient marine ecosystems, potentially contributing to Blue Carbon sequestration. The degradation of this organic material is slow and recent research has revealed the preservation of photosynthetic functions over time. However, the physiological correlates of detrital breakdown in Laminaria spp. have not yet been studied. The warming climate threatens to reshuffle the species composition of kelp forests and perturb the dynamics of these highly productive ecosystems. The present study compares the physiological response of degrading detritus from two competing North East Atlantic species; the native Boreal Laminaria hyperborea and the thermally tolerant Boreal-Lusitanian L. ochroleuca. Detrital fragment degradation was measured by a mesocosm experiment across a gradient of spectral attenuation (a proxy for depth) to investigate the changes in physiological performance under different environmental conditions. Degradation of fragments was quantified over 108 days by measuring the biomass, production and respiration (by respirometry) and efficiency of Photosystem II (by PAM fluorometry). Data indicated that whilst degrading, the photosynthetic performance of the species responded differently to simulated depths, but fragments of both species continued to produce oxygen for up to 56 days and sustained positive net primary production. This study reveals the potential for ostensibly detrital kelp to contribute to Blue Carbon fixation through sustained primary production which should be factored into Blue Carbon management. Furthermore, the physiological response of kelp detritus is likely dependent upon the range of habitats to which it is exported. In the context of climate change, shifts in species composition of kelp forests and their detritus are likely to have wide-reaching effects upon ... Article in Journal/Newspaper North East Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Marine Environmental Research 166 105277 |
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 |
Climate change Detritus North East Atlantic Oxygen production PAM fluorescence Respiration Trophic transfer [SDE]Environmental Sciences |
spellingShingle |
Climate change Detritus North East Atlantic Oxygen production PAM fluorescence Respiration Trophic transfer [SDE]Environmental Sciences Frontier, Nadia de Bettignies, Florian Foggo, Andy Davoult, Dominique Sustained productivity and respiration of degrading kelp detritus in the shallow benthos: Detached or broken, but not dead |
topic_facet |
Climate change Detritus North East Atlantic Oxygen production PAM fluorescence Respiration Trophic transfer [SDE]Environmental Sciences |
description |
International audience Temperate kelp forests contribute significantly to marine primary productivity and fuel many benthic and pelagic food chains. A large proportion of biomass is exported from kelp forests as detritus into recipient marine ecosystems, potentially contributing to Blue Carbon sequestration. The degradation of this organic material is slow and recent research has revealed the preservation of photosynthetic functions over time. However, the physiological correlates of detrital breakdown in Laminaria spp. have not yet been studied. The warming climate threatens to reshuffle the species composition of kelp forests and perturb the dynamics of these highly productive ecosystems. The present study compares the physiological response of degrading detritus from two competing North East Atlantic species; the native Boreal Laminaria hyperborea and the thermally tolerant Boreal-Lusitanian L. ochroleuca. Detrital fragment degradation was measured by a mesocosm experiment across a gradient of spectral attenuation (a proxy for depth) to investigate the changes in physiological performance under different environmental conditions. Degradation of fragments was quantified over 108 days by measuring the biomass, production and respiration (by respirometry) and efficiency of Photosystem II (by PAM fluorometry). Data indicated that whilst degrading, the photosynthetic performance of the species responded differently to simulated depths, but fragments of both species continued to produce oxygen for up to 56 days and sustained positive net primary production. This study reveals the potential for ostensibly detrital kelp to contribute to Blue Carbon fixation through sustained primary production which should be factored into Blue Carbon management. Furthermore, the physiological response of kelp detritus is likely dependent upon the range of habitats to which it is exported. In the context of climate change, shifts in species composition of kelp forests and their detritus are likely to have wide-reaching effects upon ... |
author2 |
Adaptation et diversité en milieu marin (AD2M) Station biologique de Roscoff (SBR) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Frontier, Nadia de Bettignies, Florian Foggo, Andy Davoult, Dominique |
author_facet |
Frontier, Nadia de Bettignies, Florian Foggo, Andy Davoult, Dominique |
author_sort |
Frontier, Nadia |
title |
Sustained productivity and respiration of degrading kelp detritus in the shallow benthos: Detached or broken, but not dead |
title_short |
Sustained productivity and respiration of degrading kelp detritus in the shallow benthos: Detached or broken, but not dead |
title_full |
Sustained productivity and respiration of degrading kelp detritus in the shallow benthos: Detached or broken, but not dead |
title_fullStr |
Sustained productivity and respiration of degrading kelp detritus in the shallow benthos: Detached or broken, but not dead |
title_full_unstemmed |
Sustained productivity and respiration of degrading kelp detritus in the shallow benthos: Detached or broken, but not dead |
title_sort |
sustained productivity and respiration of degrading kelp detritus in the shallow benthos: detached or broken, but not dead |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03184625 https://hal.archives-ouvertes.fr/hal-03184625/document https://hal.archives-ouvertes.fr/hal-03184625/file/Frontier%20%26%20de%20Bettignies,%202021-MER%20pre-proof.pdf https://doi.org/10.1016/j.marenvres.2021.105277 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
ISSN: 0141-1136 EISSN: 1879-0291 Marine Environmental Research https://hal.archives-ouvertes.fr/hal-03184625 Marine Environmental Research, Elsevier science, 2021, 166, pp.105277. ⟨10.1016/j.marenvres.2021.105277⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marenvres.2021.105277 hal-03184625 https://hal.archives-ouvertes.fr/hal-03184625 https://hal.archives-ouvertes.fr/hal-03184625/document https://hal.archives-ouvertes.fr/hal-03184625/file/Frontier%20%26%20de%20Bettignies,%202021-MER%20pre-proof.pdf doi:10.1016/j.marenvres.2021.105277 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.marenvres.2021.105277 |
container_title |
Marine Environmental Research |
container_volume |
166 |
container_start_page |
105277 |
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1766138800662118400 |