Productivity of mixed kelp communities in an Arctic fjord exhibit tolerance to a future climate
International audience Arctic fjords are considered to be one of the ecosystems changing most rapidly in response to climate change. In the Svalbard archipelago, fjords are experiencing a shift in environmental conditions due to the Atlantification of Arctic waters and the retreat of sea-terminating...
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Online Access: | https://hal.science/hal-04564045 https://hal.science/hal-04564045/document https://hal.science/hal-04564045/file/1-s2.0-S0048969724027177-main.pdf https://doi.org/10.1016/j.scitotenv.2024.172571 |
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ftsorbonneuniv:oai:HAL:hal-04564045v1 2024-05-19T07:34:55+00:00 Productivity of mixed kelp communities in an Arctic fjord exhibit tolerance to a future climate Miller, Cale, A Gazeau, Frédéric Lebrun, Anaïs Gattuso, Jean-Pierre Alliouane, Samir Urrutti, Pierre Schlegel, Robert, W Comeau, Steeve Universiteit Utrecht / Utrecht University Utrecht Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institut du Développement Durable et des Relations Internationales (IDDRI) Institut d'Études Politiques IEP - Paris 2024 https://hal.science/hal-04564045 https://hal.science/hal-04564045/document https://hal.science/hal-04564045/file/1-s2.0-S0048969724027177-main.pdf https://doi.org/10.1016/j.scitotenv.2024.172571 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2024.172571 hal-04564045 https://hal.science/hal-04564045 https://hal.science/hal-04564045/document https://hal.science/hal-04564045/file/1-s2.0-S0048969724027177-main.pdf doi:10.1016/j.scitotenv.2024.172571 info:eu-repo/semantics/OpenAccess ISSN: 0048-9697 EISSN: 1879-1026 Science of the Total Environment https://hal.science/hal-04564045 Science of the Total Environment, 2024, 930, pp.172571. ⟨10.1016/j.scitotenv.2024.172571⟩ Kelp Arctic Multi-stressors Climate change Net community production Compensation irradiance [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2024 ftsorbonneuniv https://doi.org/10.1016/j.scitotenv.2024.172571 2024-05-02T02:02:54Z International audience Arctic fjords are considered to be one of the ecosystems changing most rapidly in response to climate change. In the Svalbard archipelago, fjords are experiencing a shift in environmental conditions due to the Atlantification of Arctic waters and the retreat of sea-terminating glaciers. These environmental changes are predicted to facilitate expansion of large, brown macroalgae, into new ice-free regions. The potential resilience of macroalgal benthic communities in these fjord systems will depend on their response to combined pressures from freshening due to glacial melt, exposure to warmer waters, and increased turbidity from meltwater runoff which reduces light penetration. Current predictions, however, have a limited ability to elucidate the future impacts of multiple-drivers on macroalgal communities with respect to ecosystem function and biogeochemical cycling in Arctic fjords. To assess the impact of these combined future environmental changes on benthic productivity and resilience, we conducted a two-month mesocosm experiment exposing mixed kelp communities to three future conditions comprising increased temperature (+ 3.3 and + 5.3°C), seawater freshening by ∼ 3.0 and ∼ 5.0 units (i.e., salinity of 30 and 28, respectively), and decreased photosynthetically active radiation (PAR, - 25 and - 40 %). Exposure to these combined treatments resulted in non-significant differences in short-term productivity, and a tolerance of the photosynthetic capacity across the treatment conditions. We present the first robust estimates of mixed kelp community production in Kongsfjorden and place a median compensation irradiance of ∼12.5 mmol photons m$^−$$^2$ h$^−$$^1$ as the threshold for positive net community productivity. These results are discussed in the context of ecosystem productivity and biological tolerance of kelp communities in future Arctic fjord systems. Article in Journal/Newspaper Arctic Climate change Kongsfjord* Kongsfjorden Svalbard HAL Sorbonne Université Science of The Total Environment 930 172571 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
Kelp Arctic Multi-stressors Climate change Net community production Compensation irradiance [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Kelp Arctic Multi-stressors Climate change Net community production Compensation irradiance [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Miller, Cale, A Gazeau, Frédéric Lebrun, Anaïs Gattuso, Jean-Pierre Alliouane, Samir Urrutti, Pierre Schlegel, Robert, W Comeau, Steeve Productivity of mixed kelp communities in an Arctic fjord exhibit tolerance to a future climate |
topic_facet |
Kelp Arctic Multi-stressors Climate change Net community production Compensation irradiance [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Arctic fjords are considered to be one of the ecosystems changing most rapidly in response to climate change. In the Svalbard archipelago, fjords are experiencing a shift in environmental conditions due to the Atlantification of Arctic waters and the retreat of sea-terminating glaciers. These environmental changes are predicted to facilitate expansion of large, brown macroalgae, into new ice-free regions. The potential resilience of macroalgal benthic communities in these fjord systems will depend on their response to combined pressures from freshening due to glacial melt, exposure to warmer waters, and increased turbidity from meltwater runoff which reduces light penetration. Current predictions, however, have a limited ability to elucidate the future impacts of multiple-drivers on macroalgal communities with respect to ecosystem function and biogeochemical cycling in Arctic fjords. To assess the impact of these combined future environmental changes on benthic productivity and resilience, we conducted a two-month mesocosm experiment exposing mixed kelp communities to three future conditions comprising increased temperature (+ 3.3 and + 5.3°C), seawater freshening by ∼ 3.0 and ∼ 5.0 units (i.e., salinity of 30 and 28, respectively), and decreased photosynthetically active radiation (PAR, - 25 and - 40 %). Exposure to these combined treatments resulted in non-significant differences in short-term productivity, and a tolerance of the photosynthetic capacity across the treatment conditions. We present the first robust estimates of mixed kelp community production in Kongsfjorden and place a median compensation irradiance of ∼12.5 mmol photons m$^−$$^2$ h$^−$$^1$ as the threshold for positive net community productivity. These results are discussed in the context of ecosystem productivity and biological tolerance of kelp communities in future Arctic fjord systems. |
author2 |
Universiteit Utrecht / Utrecht University Utrecht Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institut du Développement Durable et des Relations Internationales (IDDRI) Institut d'Études Politiques IEP - Paris |
format |
Article in Journal/Newspaper |
author |
Miller, Cale, A Gazeau, Frédéric Lebrun, Anaïs Gattuso, Jean-Pierre Alliouane, Samir Urrutti, Pierre Schlegel, Robert, W Comeau, Steeve |
author_facet |
Miller, Cale, A Gazeau, Frédéric Lebrun, Anaïs Gattuso, Jean-Pierre Alliouane, Samir Urrutti, Pierre Schlegel, Robert, W Comeau, Steeve |
author_sort |
Miller, Cale, A |
title |
Productivity of mixed kelp communities in an Arctic fjord exhibit tolerance to a future climate |
title_short |
Productivity of mixed kelp communities in an Arctic fjord exhibit tolerance to a future climate |
title_full |
Productivity of mixed kelp communities in an Arctic fjord exhibit tolerance to a future climate |
title_fullStr |
Productivity of mixed kelp communities in an Arctic fjord exhibit tolerance to a future climate |
title_full_unstemmed |
Productivity of mixed kelp communities in an Arctic fjord exhibit tolerance to a future climate |
title_sort |
productivity of mixed kelp communities in an arctic fjord exhibit tolerance to a future climate |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04564045 https://hal.science/hal-04564045/document https://hal.science/hal-04564045/file/1-s2.0-S0048969724027177-main.pdf https://doi.org/10.1016/j.scitotenv.2024.172571 |
genre |
Arctic Climate change Kongsfjord* Kongsfjorden Svalbard |
genre_facet |
Arctic Climate change Kongsfjord* Kongsfjorden Svalbard |
op_source |
ISSN: 0048-9697 EISSN: 1879-1026 Science of the Total Environment https://hal.science/hal-04564045 Science of the Total Environment, 2024, 930, pp.172571. ⟨10.1016/j.scitotenv.2024.172571⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2024.172571 hal-04564045 https://hal.science/hal-04564045 https://hal.science/hal-04564045/document https://hal.science/hal-04564045/file/1-s2.0-S0048969724027177-main.pdf doi:10.1016/j.scitotenv.2024.172571 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.scitotenv.2024.172571 |
container_title |
Science of The Total Environment |
container_volume |
930 |
container_start_page |
172571 |
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1799473133901578240 |