Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling
The stable boron isotope composition (d11B) of fossil foraminiferalshells is used as a paleo-pH recorder and is therefore one of themost promising paleo-carbonate chemistry proxies ('paleoacidimetry').One crucial question regarding this proxy is whether foraminiferarecord the pHof the bulk...
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ftawi:oai:epic.awi.de:6087 2023-09-05T13:22:40+02:00 Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling Zeebe, Richard Wolf-Gladrow, Dieter Bijma, Jelle Hoenisch, B. 2003 application/pdf https://epic.awi.de/id/eprint/6087/ https://epic.awi.de/id/eprint/6087/1/Zee2003a.pdf https://doi.org/10.1029/2003PA000881 https://hdl.handle.net/10013/epic.16637 https://hdl.handle.net/10013/epic.16637.d001 unknown https://epic.awi.de/id/eprint/6087/1/Zee2003a.pdf https://hdl.handle.net/10013/epic.16637.d001 Zeebe, R. , Wolf-Gladrow, D. orcid:0000-0001-9531-8668 , Bijma, J. orcid:0000-0003-4371-1438 and Hoenisch, B. (2003) Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling , Paleoceanography, 18 (2) . doi:10.1029/2003PA000881 <https://doi.org/10.1029/2003PA000881> , hdl:10013/epic.16637 EPIC3Paleoceanography, 18(2), 1043 p. Article isiRev 2003 ftawi https://doi.org/10.1029/2003PA000881 2023-08-22T19:45:53Z The stable boron isotope composition (d11B) of fossil foraminiferalshells is used as a paleo-pH recorder and is therefore one of themost promising paleo-carbonate chemistry proxies ('paleoacidimetry').One crucial question regarding this proxy is whether foraminiferarecord the pHof the bulk seawater or the pH of the microenvironment (diffusiveboundary layer, ~500mum) which is strongly influenced bylife processes. Here we present a novel, theoretical approach toaddress this question by using a diffusion-reaction model. Model resultsindicate that the d11B in planktonic foraminifera is primarilycontrolled by the pH of the microenvironment. We therefore predictthat the d11B of different species (e.g. symbiont-bearing vs.symbiont-barren) or of foraminifera grown in the dark andin the light should be offset from the d11B of inorganic calcite.This theoretical prediction was experimentally confirmed while thispaper was written (Hoenisch et al., in revision).Most importantly, the model predicts that this offset is constantover a wide pH range. Thus, the use of d11B as a paleo-pHindicator is not compromised through vital effects as modeled here. Article in Journal/Newspaper Planktonic foraminifera Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Paleoceanography 18 2 n/a n/a |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The stable boron isotope composition (d11B) of fossil foraminiferalshells is used as a paleo-pH recorder and is therefore one of themost promising paleo-carbonate chemistry proxies ('paleoacidimetry').One crucial question regarding this proxy is whether foraminiferarecord the pHof the bulk seawater or the pH of the microenvironment (diffusiveboundary layer, ~500mum) which is strongly influenced bylife processes. Here we present a novel, theoretical approach toaddress this question by using a diffusion-reaction model. Model resultsindicate that the d11B in planktonic foraminifera is primarilycontrolled by the pH of the microenvironment. We therefore predictthat the d11B of different species (e.g. symbiont-bearing vs.symbiont-barren) or of foraminifera grown in the dark andin the light should be offset from the d11B of inorganic calcite.This theoretical prediction was experimentally confirmed while thispaper was written (Hoenisch et al., in revision).Most importantly, the model predicts that this offset is constantover a wide pH range. Thus, the use of d11B as a paleo-pHindicator is not compromised through vital effects as modeled here. |
format |
Article in Journal/Newspaper |
author |
Zeebe, Richard Wolf-Gladrow, Dieter Bijma, Jelle Hoenisch, B. |
spellingShingle |
Zeebe, Richard Wolf-Gladrow, Dieter Bijma, Jelle Hoenisch, B. Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling |
author_facet |
Zeebe, Richard Wolf-Gladrow, Dieter Bijma, Jelle Hoenisch, B. |
author_sort |
Zeebe, Richard |
title |
Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling |
title_short |
Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling |
title_full |
Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling |
title_fullStr |
Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling |
title_full_unstemmed |
Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling |
title_sort |
vital effects in foraminifera do not compromise the use of d11b as a paleo-ph indicator: evidence from modeling |
publishDate |
2003 |
url |
https://epic.awi.de/id/eprint/6087/ https://epic.awi.de/id/eprint/6087/1/Zee2003a.pdf https://doi.org/10.1029/2003PA000881 https://hdl.handle.net/10013/epic.16637 https://hdl.handle.net/10013/epic.16637.d001 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
EPIC3Paleoceanography, 18(2), 1043 p. |
op_relation |
https://epic.awi.de/id/eprint/6087/1/Zee2003a.pdf https://hdl.handle.net/10013/epic.16637.d001 Zeebe, R. , Wolf-Gladrow, D. orcid:0000-0001-9531-8668 , Bijma, J. orcid:0000-0003-4371-1438 and Hoenisch, B. (2003) Vital effects in foraminifera do not compromise the use of d11B as a paleo-pH indicator: Evidence from modeling , Paleoceanography, 18 (2) . doi:10.1029/2003PA000881 <https://doi.org/10.1029/2003PA000881> , hdl:10013/epic.16637 |
op_doi |
https://doi.org/10.1029/2003PA000881 |
container_title |
Paleoceanography |
container_volume |
18 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1776203195922513920 |