Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and p CO 2 gradients
Boron isotope systematics of planktonic foraminifera from core-top sediments and culture experiments have been studied to investigate the sensitivity ofδ11B of calcite tests to seawater pH. However, our knowledge of the relationship between δ11B and pH remains incomplete for many taxa. Thus, to expa...
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ftosti:oai:osti.gov:1802074 2023-07-30T04:06:24+02:00 Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and p CO 2 gradients Guillermic, Maxence Misra, Sambuddha Eagle, Robert Villa, Alexandra Chang, Fengming Tripati, Aradhna 2021-09-21 application/pdf http://www.osti.gov/servlets/purl/1802074 https://www.osti.gov/biblio/1802074 https://doi.org/10.5194/bg-17-3487-2020 unknown http://www.osti.gov/servlets/purl/1802074 https://www.osti.gov/biblio/1802074 https://doi.org/10.5194/bg-17-3487-2020 doi:10.5194/bg-17-3487-2020 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 2021 ftosti https://doi.org/10.5194/bg-17-3487-2020 2023-07-11T10:04:45Z Boron isotope systematics of planktonic foraminifera from core-top sediments and culture experiments have been studied to investigate the sensitivity ofδ11B of calcite tests to seawater pH. However, our knowledge of the relationship between δ11B and pH remains incomplete for many taxa. Thus, to expand the potential scope of application of this proxy, we report δ11B data for seven different species of planktonic foraminifera from sediment core tops. We utilize a method for the measurement of small samples of foraminifera and calculate the δ11B-calcite sensitivity to pH for Globigerinoides ruber, Trilobus sacculifer (sacc or without sacc), Orbulina universa, Pulleniatina obliquiloculata, Neogloboquadrina dutertrei, Globorotalia menardii, and Globorotalia tumida, including for unstudied core tops and species. These taxa have diverse ecological preferences and are from sites that span a range of oceanographic regimes, including some that are in regions of air–sea equilibrium and others that are out of equilibrium with the atmosphere. The sensitivity of δ11Bcarbonate to δ11Bborate (e.g., Δδ11Bcarbonate/Δδ11Bborate) in core tops is consistent with previous studies for T. sacculifer and G. ruber and close to unity for N. dutertrei, O. universa, and combined deep-dwelling species. Deep-dwelling species closely follow the core-top calibration fo rO. universa, which is attributed to respiration-driven microenvironments likely caused by light limitation and/or symbiont–host interactions. Our data support the premise that utilizing boron isotope measurements of multiple species within a sediment core can be utilized to constrain vertical profiles of pH andpCO2 at sites spanning different oceanic regimes, thereby constraining changes in vertical pH gradients and yielding insights into the past behavior of the oceanic carbon pumps. Other/Unknown Material Planktonic foraminifera SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Biogeosciences 17 13 3487 3510 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES Guillermic, Maxence Misra, Sambuddha Eagle, Robert Villa, Alexandra Chang, Fengming Tripati, Aradhna Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and p CO 2 gradients |
topic_facet |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES |
description |
Boron isotope systematics of planktonic foraminifera from core-top sediments and culture experiments have been studied to investigate the sensitivity ofδ11B of calcite tests to seawater pH. However, our knowledge of the relationship between δ11B and pH remains incomplete for many taxa. Thus, to expand the potential scope of application of this proxy, we report δ11B data for seven different species of planktonic foraminifera from sediment core tops. We utilize a method for the measurement of small samples of foraminifera and calculate the δ11B-calcite sensitivity to pH for Globigerinoides ruber, Trilobus sacculifer (sacc or without sacc), Orbulina universa, Pulleniatina obliquiloculata, Neogloboquadrina dutertrei, Globorotalia menardii, and Globorotalia tumida, including for unstudied core tops and species. These taxa have diverse ecological preferences and are from sites that span a range of oceanographic regimes, including some that are in regions of air–sea equilibrium and others that are out of equilibrium with the atmosphere. The sensitivity of δ11Bcarbonate to δ11Bborate (e.g., Δδ11Bcarbonate/Δδ11Bborate) in core tops is consistent with previous studies for T. sacculifer and G. ruber and close to unity for N. dutertrei, O. universa, and combined deep-dwelling species. Deep-dwelling species closely follow the core-top calibration fo rO. universa, which is attributed to respiration-driven microenvironments likely caused by light limitation and/or symbiont–host interactions. Our data support the premise that utilizing boron isotope measurements of multiple species within a sediment core can be utilized to constrain vertical profiles of pH andpCO2 at sites spanning different oceanic regimes, thereby constraining changes in vertical pH gradients and yielding insights into the past behavior of the oceanic carbon pumps. |
author |
Guillermic, Maxence Misra, Sambuddha Eagle, Robert Villa, Alexandra Chang, Fengming Tripati, Aradhna |
author_facet |
Guillermic, Maxence Misra, Sambuddha Eagle, Robert Villa, Alexandra Chang, Fengming Tripati, Aradhna |
author_sort |
Guillermic, Maxence |
title |
Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and p CO 2 gradients |
title_short |
Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and p CO 2 gradients |
title_full |
Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and p CO 2 gradients |
title_fullStr |
Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and p CO 2 gradients |
title_full_unstemmed |
Seawater pH reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain pH and p CO 2 gradients |
title_sort |
seawater ph reconstruction using boron isotopes in multiple planktonic foraminifera species with different depth habitats and their potential to constrain ph and p co 2 gradients |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1802074 https://www.osti.gov/biblio/1802074 https://doi.org/10.5194/bg-17-3487-2020 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
http://www.osti.gov/servlets/purl/1802074 https://www.osti.gov/biblio/1802074 https://doi.org/10.5194/bg-17-3487-2020 doi:10.5194/bg-17-3487-2020 |
op_doi |
https://doi.org/10.5194/bg-17-3487-2020 |
container_title |
Biogeosciences |
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17 |
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13 |
container_start_page |
3487 |
op_container_end_page |
3510 |
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1772818978908930048 |