Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment
International audience Calcifying foraminifera are expected to be endangered by ocean acidification; however, the response of a complete community kept in natural sediment and over multiple generations under controlled laboratory conditions has not been constrained to date. During 6 months of incuba...
Published in: | Biogeosciences |
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Online Access: | https://univ-angers.hal.science/hal-03278283 https://univ-angers.hal.science/hal-03278283/document https://univ-angers.hal.science/hal-03278283/file/bg-11-1581-2014.pdf https://doi.org/10.5194/bg-11-1581-2014 |
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ftunivnantes:oai:HAL:hal-03278283v1 2023-06-11T04:15:35+02:00 Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment Haynert, Kristin Schönfeld, Joachim Schiebel, Ralf Wilson, B. Thomsen, J. Laboratoire de Planétologie et Géodynamique - Angers (LPG-ANGERS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2014 https://univ-angers.hal.science/hal-03278283 https://univ-angers.hal.science/hal-03278283/document https://univ-angers.hal.science/hal-03278283/file/bg-11-1581-2014.pdf https://doi.org/10.5194/bg-11-1581-2014 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-1581-2014 hal-03278283 https://univ-angers.hal.science/hal-03278283 https://univ-angers.hal.science/hal-03278283/document https://univ-angers.hal.science/hal-03278283/file/bg-11-1581-2014.pdf doi:10.5194/bg-11-1581-2014 OKINA: ua18676 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://univ-angers.hal.science/hal-03278283 Biogeosciences, 2014, 11 (6), pp.1581-1597. ⟨10.5194/bg-11-1581-2014⟩ https://www.biogeosciences.net/11/1581/2014/ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2014 ftunivnantes https://doi.org/10.5194/bg-11-1581-2014 2023-05-02T22:44:04Z International audience Calcifying foraminifera are expected to be endangered by ocean acidification; however, the response of a complete community kept in natural sediment and over multiple generations under controlled laboratory conditions has not been constrained to date. During 6 months of incubation, foraminiferal assemblages were kept and treated in natural sediment with pCO2-enriched seawater of 430, 907, 1865 and 3247 μatm pCO2. The fauna was dominated by Ammonia aomoriensis and Elphidium species, whereas agglutinated species were rare. After 6 months of incubation, pore water alkalinity was much higher in comparison to the overlying seawater. Consequently, the saturation state of Ωcalc was much higher in the sediment than in the water column in nearly all pCO2 treatments and remained close to saturation. As a result, the life cycle (population density, growth and reproduction) of living assemblages varied markedly during the experimental period, but was largely unaffected by the pCO2 treatments applied. According to the size–frequency distribution, we conclude that foraminifera start reproduction at a diameter of 250 μm. Mortality of living Ammonia aomoriensis was unaffected, whereas size of large and dead tests decreased with elevated pCO2 from 285 μm (pCO2 from 430 to 1865 μatm) to 258 μm (pCO2 3247 μatm). The total organic content of living Ammonia aomoriensis has been determined to be 4.3% of CaCO3 weight. Living individuals had a calcium carbonate production rate of 0.47 g m−2 a−1, whereas dead empty tests accumulated a rate of 0.27 g m−2 a−1. Although Ωcalc was close to 1, approximately 30% of the empty tests of Ammonia aomoriensis showed dissolution features at high pCO2 of 3247 μatm during the last 2 months of incubation. In contrast, tests of the subdominant species, Elphidium incertum, stayed intact. Our results emphasize that the sensitivity to ocean acidification of the endobenthic foraminifera Ammonia aomoriensis in their natural sediment habitat is much lower compared to the experimental ... Article in Journal/Newspaper Ocean acidification Université de Nantes: HAL-UNIV-NANTES Biogeosciences 11 6 1581 1597 |
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Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Haynert, Kristin Schönfeld, Joachim Schiebel, Ralf Wilson, B. Thomsen, J. Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Calcifying foraminifera are expected to be endangered by ocean acidification; however, the response of a complete community kept in natural sediment and over multiple generations under controlled laboratory conditions has not been constrained to date. During 6 months of incubation, foraminiferal assemblages were kept and treated in natural sediment with pCO2-enriched seawater of 430, 907, 1865 and 3247 μatm pCO2. The fauna was dominated by Ammonia aomoriensis and Elphidium species, whereas agglutinated species were rare. After 6 months of incubation, pore water alkalinity was much higher in comparison to the overlying seawater. Consequently, the saturation state of Ωcalc was much higher in the sediment than in the water column in nearly all pCO2 treatments and remained close to saturation. As a result, the life cycle (population density, growth and reproduction) of living assemblages varied markedly during the experimental period, but was largely unaffected by the pCO2 treatments applied. According to the size–frequency distribution, we conclude that foraminifera start reproduction at a diameter of 250 μm. Mortality of living Ammonia aomoriensis was unaffected, whereas size of large and dead tests decreased with elevated pCO2 from 285 μm (pCO2 from 430 to 1865 μatm) to 258 μm (pCO2 3247 μatm). The total organic content of living Ammonia aomoriensis has been determined to be 4.3% of CaCO3 weight. Living individuals had a calcium carbonate production rate of 0.47 g m−2 a−1, whereas dead empty tests accumulated a rate of 0.27 g m−2 a−1. Although Ωcalc was close to 1, approximately 30% of the empty tests of Ammonia aomoriensis showed dissolution features at high pCO2 of 3247 μatm during the last 2 months of incubation. In contrast, tests of the subdominant species, Elphidium incertum, stayed intact. Our results emphasize that the sensitivity to ocean acidification of the endobenthic foraminifera Ammonia aomoriensis in their natural sediment habitat is much lower compared to the experimental ... |
author2 |
Laboratoire de Planétologie et Géodynamique - Angers (LPG-ANGERS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Haynert, Kristin Schönfeld, Joachim Schiebel, Ralf Wilson, B. Thomsen, J. |
author_facet |
Haynert, Kristin Schönfeld, Joachim Schiebel, Ralf Wilson, B. Thomsen, J. |
author_sort |
Haynert, Kristin |
title |
Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment |
title_short |
Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment |
title_full |
Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment |
title_fullStr |
Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment |
title_full_unstemmed |
Response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment |
title_sort |
response of benthic foraminifera to ocean acidification in their natural sediment environment: a long-term culturing experiment |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://univ-angers.hal.science/hal-03278283 https://univ-angers.hal.science/hal-03278283/document https://univ-angers.hal.science/hal-03278283/file/bg-11-1581-2014.pdf https://doi.org/10.5194/bg-11-1581-2014 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://univ-angers.hal.science/hal-03278283 Biogeosciences, 2014, 11 (6), pp.1581-1597. ⟨10.5194/bg-11-1581-2014⟩ https://www.biogeosciences.net/11/1581/2014/ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-1581-2014 hal-03278283 https://univ-angers.hal.science/hal-03278283 https://univ-angers.hal.science/hal-03278283/document https://univ-angers.hal.science/hal-03278283/file/bg-11-1581-2014.pdf doi:10.5194/bg-11-1581-2014 OKINA: ua18676 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-11-1581-2014 |
container_title |
Biogeosciences |
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11 |
container_issue |
6 |
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1581 |
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1597 |
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