Silicon consumption kinetics by marine sponges: An assessment of their role at the ecosystem level
The silicic acid (DSi) is a dissolved nutrient used by diverse marine organisms to build their skeletons of biogenic silica (BSi). This consumption, mostly due to diatoms, largely determines the availability of DSi in the photic ocean. Yet growing evidence suggests that Si consumers traditionally di...
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ftzenodo:oai:zenodo.org:2645171 2024-09-15T18:24:22+00:00 Silicon consumption kinetics by marine sponges: An assessment of their role at the ecosystem level López-Acosta, Maria Leynaert, Aude Grall, Jacques Maldonado, Manuel 2018-08-17 https://doi.org/10.1002/lno.10956 unknown Zenodo https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.10956 https://zenodo.org/communities/sponges https://zenodo.org/communities/eu https://doi.org/10.1002/lno.10956 oai:zenodo.org:2645171 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Limnology and Oceanography, 63(6), 2508-2522, (2018-08-17) Porifera silicic acid European Union (EU) Horizon 2020 Grant Agreement No 679849 Deep-sea Sponge Grounds Ecosystems of the North Atlantic: an integrated approach towards their preservation and sustainable exploitation SponGES info:eu-repo/semantics/article 2018 ftzenodo https://doi.org/10.1002/lno.10956 2024-07-27T03:46:50Z The silicic acid (DSi) is a dissolved nutrient used by diverse marine organisms to build their skeletons of biogenic silica (BSi). This consumption, mostly due to diatoms, largely determines the availability of DSi in the photic ocean. Yet growing evidence suggests that Si consumers traditionally disregarded, such as the siliceous sponges, may also play a role. This study investigated the kinetics of DSi utilization by two demosponges as a function of both DSi availability and duration of the incubation period (24 h vs. 48 h). Consumption increased with increasing DSi availability following a saturable Michaelis–Menten kinetics. Haliclona simulans saturated at about 70 μ M ( K m = 45.9) and Suberites ficus around 130 μ M ( K m = 108.2). Forty‐eight hour incubations yielded more conservative consumption rates than 24 h incubations, particularly when DSi availability was far below saturation. DSi concentrations in the sponge natural habitats (0.2–15 μ M) were consistently much lower than required for efficient elaboration of the BSi skeleton, suggesting a chronic DSi limitation. The DSi consumption kinetics was combined with quantifications of sponge biomass in the Bay of Brest (France), which was used as case study. In this system, sponges consume daily 0.10 ± 0.19 mmol Si m −2 and about 6.4 × 10 6 mol Si yearly. This activity represents 7.6% of the net annual BSi production in the Bay, a figure overlooked in previous nutrient balances based only on diatoms. Since the world marine Si cycle does not yet incorporate the contribution of sponges, its global BSi production budget may also be underestimated. ACKNOWLEDGEMENTS. The authors thank Valérie Coquillé for help with DSi analysis, and Vincent Le Garrec and Marta García-Puig for help during mapping Fig. 2. Erwan Amice, Thierry Le Bec, Isabelle Bihannic, and Emilie Grossteffan are thanked for assistance during underwater field work. The SOMLIT-Brest long-term data base is acknowledged for accessible their parameters for the Bay of Brest. The authors also thank ... Article in Journal/Newspaper North Atlantic Zenodo Limnology and Oceanography 63 6 2508 2522 |
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Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Porifera silicic acid European Union (EU) Horizon 2020 Grant Agreement No 679849 Deep-sea Sponge Grounds Ecosystems of the North Atlantic: an integrated approach towards their preservation and sustainable exploitation SponGES |
spellingShingle |
Porifera silicic acid European Union (EU) Horizon 2020 Grant Agreement No 679849 Deep-sea Sponge Grounds Ecosystems of the North Atlantic: an integrated approach towards their preservation and sustainable exploitation SponGES López-Acosta, Maria Leynaert, Aude Grall, Jacques Maldonado, Manuel Silicon consumption kinetics by marine sponges: An assessment of their role at the ecosystem level |
topic_facet |
Porifera silicic acid European Union (EU) Horizon 2020 Grant Agreement No 679849 Deep-sea Sponge Grounds Ecosystems of the North Atlantic: an integrated approach towards their preservation and sustainable exploitation SponGES |
description |
The silicic acid (DSi) is a dissolved nutrient used by diverse marine organisms to build their skeletons of biogenic silica (BSi). This consumption, mostly due to diatoms, largely determines the availability of DSi in the photic ocean. Yet growing evidence suggests that Si consumers traditionally disregarded, such as the siliceous sponges, may also play a role. This study investigated the kinetics of DSi utilization by two demosponges as a function of both DSi availability and duration of the incubation period (24 h vs. 48 h). Consumption increased with increasing DSi availability following a saturable Michaelis–Menten kinetics. Haliclona simulans saturated at about 70 μ M ( K m = 45.9) and Suberites ficus around 130 μ M ( K m = 108.2). Forty‐eight hour incubations yielded more conservative consumption rates than 24 h incubations, particularly when DSi availability was far below saturation. DSi concentrations in the sponge natural habitats (0.2–15 μ M) were consistently much lower than required for efficient elaboration of the BSi skeleton, suggesting a chronic DSi limitation. The DSi consumption kinetics was combined with quantifications of sponge biomass in the Bay of Brest (France), which was used as case study. In this system, sponges consume daily 0.10 ± 0.19 mmol Si m −2 and about 6.4 × 10 6 mol Si yearly. This activity represents 7.6% of the net annual BSi production in the Bay, a figure overlooked in previous nutrient balances based only on diatoms. Since the world marine Si cycle does not yet incorporate the contribution of sponges, its global BSi production budget may also be underestimated. ACKNOWLEDGEMENTS. The authors thank Valérie Coquillé for help with DSi analysis, and Vincent Le Garrec and Marta García-Puig for help during mapping Fig. 2. Erwan Amice, Thierry Le Bec, Isabelle Bihannic, and Emilie Grossteffan are thanked for assistance during underwater field work. The SOMLIT-Brest long-term data base is acknowledged for accessible their parameters for the Bay of Brest. The authors also thank ... |
format |
Article in Journal/Newspaper |
author |
López-Acosta, Maria Leynaert, Aude Grall, Jacques Maldonado, Manuel |
author_facet |
López-Acosta, Maria Leynaert, Aude Grall, Jacques Maldonado, Manuel |
author_sort |
López-Acosta, Maria |
title |
Silicon consumption kinetics by marine sponges: An assessment of their role at the ecosystem level |
title_short |
Silicon consumption kinetics by marine sponges: An assessment of their role at the ecosystem level |
title_full |
Silicon consumption kinetics by marine sponges: An assessment of their role at the ecosystem level |
title_fullStr |
Silicon consumption kinetics by marine sponges: An assessment of their role at the ecosystem level |
title_full_unstemmed |
Silicon consumption kinetics by marine sponges: An assessment of their role at the ecosystem level |
title_sort |
silicon consumption kinetics by marine sponges: an assessment of their role at the ecosystem level |
publisher |
Zenodo |
publishDate |
2018 |
url |
https://doi.org/10.1002/lno.10956 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Limnology and Oceanography, 63(6), 2508-2522, (2018-08-17) |
op_relation |
https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.10956 https://zenodo.org/communities/sponges https://zenodo.org/communities/eu https://doi.org/10.1002/lno.10956 oai:zenodo.org:2645171 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.1002/lno.10956 |
container_title |
Limnology and Oceanography |
container_volume |
63 |
container_issue |
6 |
container_start_page |
2508 |
op_container_end_page |
2522 |
_version_ |
1810464701177397248 |