Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy.
Culture experiments were carried out with the planktonic foraminifera Globigerinoides sacculifer at three different pH values (7.6+0.05, 8.20+0.05, 8.60+0.05) in order to establish the pH-dependence of the boron isotopic fractionation between the calcitic tests of G. sacculifer and seawater. Additio...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2001
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/6088/ https://epic.awi.de/id/eprint/6088/1/San2001a.pdf https://doi.org/10.1029/2000PA000547 https://hdl.handle.net/10013/epic.16638 https://hdl.handle.net/10013/epic.16638.d001 |
id |
ftawi:oai:epic.awi.de:6088 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:6088 2023-09-05T13:22:41+02:00 Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. Sanyal, A. Bijma, Jelle Spero, H. J. Lea, D. W. 2001 application/pdf https://epic.awi.de/id/eprint/6088/ https://epic.awi.de/id/eprint/6088/1/San2001a.pdf https://doi.org/10.1029/2000PA000547 https://hdl.handle.net/10013/epic.16638 https://hdl.handle.net/10013/epic.16638.d001 unknown https://epic.awi.de/id/eprint/6088/1/San2001a.pdf https://hdl.handle.net/10013/epic.16638.d001 Sanyal, A. , Bijma, J. orcid:0000-0003-4371-1438 , Spero, H. J. and Lea, D. W. (2001) Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. , Paleoceanography, 16 (5), pp. 515-519 . doi:10.1029/2000PA000547 <https://doi.org/10.1029/2000PA000547> , hdl:10013/epic.16638 EPIC3Paleoceanography, 16(5), pp. 515-519 Article isiRev 2001 ftawi https://doi.org/10.1029/2000PA000547 2023-08-22T19:45:53Z Culture experiments were carried out with the planktonic foraminifera Globigerinoides sacculifer at three different pH values (7.6+0.05, 8.20+0.05, 8.60+0.05) in order to establish the pH-dependence of the boron isotopic fractionation between the calcitic tests of G. sacculifer and seawater. Additional objectives were to compare the pH dependences of boron isotopic composition of G. sacculifer with that of Orbulina universa, and inorganic calcite in order to evaluate the robustness of the boron isotope paleo pH proxy. The relationship between the boron isotopic composition of G. sacculifer and the culture water pH shows heavier boron isotopic values at higher pH. This empirical relationship is similar but slightly offset (by ~ 3 per mil) from that of O. universa indicating the presence of biogenic influence ("vital effect") on the boron isotopic composition of foraminifera. However, comparison of the boron isotopic composition of O. universa and G. sacculifer with that of inorganic calcite grown over a common pH range shows that inorganic processes are the dominant control on the boron isotopic composition of foraminifera and the "vital effects" play a small but not insignificant role. The results imply that in spite of a small biogenic influence the variation in boron isotopic composition of foraminiferal shells with pH (at least for O. universa and G. sacculifer) is consistent with that for inorganic calcite, demonstrating the potential of this isotopic signature in foraminifera as a reliable paleo pH proxy. Article in Journal/Newspaper Planktonic foraminifera Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Paleoceanography 16 5 515 519 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Culture experiments were carried out with the planktonic foraminifera Globigerinoides sacculifer at three different pH values (7.6+0.05, 8.20+0.05, 8.60+0.05) in order to establish the pH-dependence of the boron isotopic fractionation between the calcitic tests of G. sacculifer and seawater. Additional objectives were to compare the pH dependences of boron isotopic composition of G. sacculifer with that of Orbulina universa, and inorganic calcite in order to evaluate the robustness of the boron isotope paleo pH proxy. The relationship between the boron isotopic composition of G. sacculifer and the culture water pH shows heavier boron isotopic values at higher pH. This empirical relationship is similar but slightly offset (by ~ 3 per mil) from that of O. universa indicating the presence of biogenic influence ("vital effect") on the boron isotopic composition of foraminifera. However, comparison of the boron isotopic composition of O. universa and G. sacculifer with that of inorganic calcite grown over a common pH range shows that inorganic processes are the dominant control on the boron isotopic composition of foraminifera and the "vital effects" play a small but not insignificant role. The results imply that in spite of a small biogenic influence the variation in boron isotopic composition of foraminiferal shells with pH (at least for O. universa and G. sacculifer) is consistent with that for inorganic calcite, demonstrating the potential of this isotopic signature in foraminifera as a reliable paleo pH proxy. |
format |
Article in Journal/Newspaper |
author |
Sanyal, A. Bijma, Jelle Spero, H. J. Lea, D. W. |
spellingShingle |
Sanyal, A. Bijma, Jelle Spero, H. J. Lea, D. W. Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. |
author_facet |
Sanyal, A. Bijma, Jelle Spero, H. J. Lea, D. W. |
author_sort |
Sanyal, A. |
title |
Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. |
title_short |
Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. |
title_full |
Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. |
title_fullStr |
Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. |
title_full_unstemmed |
Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. |
title_sort |
empirical relationship between ph and the boron isotopic composition of globigerinoides sacculifer: implications for the boron isotope paleo-ph proxy. |
publishDate |
2001 |
url |
https://epic.awi.de/id/eprint/6088/ https://epic.awi.de/id/eprint/6088/1/San2001a.pdf https://doi.org/10.1029/2000PA000547 https://hdl.handle.net/10013/epic.16638 https://hdl.handle.net/10013/epic.16638.d001 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
EPIC3Paleoceanography, 16(5), pp. 515-519 |
op_relation |
https://epic.awi.de/id/eprint/6088/1/San2001a.pdf https://hdl.handle.net/10013/epic.16638.d001 Sanyal, A. , Bijma, J. orcid:0000-0003-4371-1438 , Spero, H. J. and Lea, D. W. (2001) Empirical relationship between pH and the boron isotopic composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy. , Paleoceanography, 16 (5), pp. 515-519 . doi:10.1029/2000PA000547 <https://doi.org/10.1029/2000PA000547> , hdl:10013/epic.16638 |
op_doi |
https://doi.org/10.1029/2000PA000547 |
container_title |
Paleoceanography |
container_volume |
16 |
container_issue |
5 |
container_start_page |
515 |
op_container_end_page |
519 |
_version_ |
1776203203502669824 |