Planktic foraminifers as recorders of seawater Ba/Ca

Bärbel Hönisch; Katherine A. Allen; Ann D. Russell; Stephen M. Eggins; Jelle Bijma; Howard J. Spero; David W. Lea; Jimin Yu

doi:10.1016/j.marmicro.2011.01.003

Planktic foraminifers as recorders of seawater Ba/Ca

Bärbel Hönisch^*, Katherine A. Allen, Ann D. Russell, Stephen M. Eggins, Jelle Bijma, Howard J. Spero, David W. Lea, Jimin Yu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

84 Citations (Scopus)

Abstract

Recent studies have used the Ba/Ca ratio of planktic foraminifer shells as a proxy for river run-off at oceanic sites near estuaries. Such studies assume that the Ba/Ca ratio in planktic foraminifer shells is primarily controlled by the Ba/Ca concentration of seawater and that other parameters such as salinity, temperature and pH do not compromise the primary Ba concentration relationship. Here we provide new insights from culture experiments and review published studies to confirm that environmental parameters including pH, temperature, salinity, and symbiont photosynthesis do not affect Ba substitution into planktic foraminiferal calcite. The partition coefficient for Ba in spinose planktic foraminifers is estimated as D_Ba=0.15±0.05 (95% confidence limits). The same factor also seems applicable to the non-spinose genus Neogloboquadrina but not to specimens of the non-spinose genus Globorotalia.

Original language	English
Pages (from-to)	52-57
Number of pages	6
Journal	Marine Micropaleontology
Volume	79
Issue number	1-2
DOIs	https://doi.org/10.1016/j.marmicro.2011.01.003
Publication status	Published - Apr 2011

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title = "Planktic foraminifers as recorders of seawater Ba/Ca",

abstract = "Recent studies have used the Ba/Ca ratio of planktic foraminifer shells as a proxy for river run-off at oceanic sites near estuaries. Such studies assume that the Ba/Ca ratio in planktic foraminifer shells is primarily controlled by the Ba/Ca concentration of seawater and that other parameters such as salinity, temperature and pH do not compromise the primary Ba concentration relationship. Here we provide new insights from culture experiments and review published studies to confirm that environmental parameters including pH, temperature, salinity, and symbiont photosynthesis do not affect Ba substitution into planktic foraminiferal calcite. The partition coefficient for Ba in spinose planktic foraminifers is estimated as DBa=0.15±0.05 (95% confidence limits). The same factor also seems applicable to the non-spinose genus Neogloboquadrina but not to specimens of the non-spinose genus Globorotalia.",

keywords = "Culturing, D, PH, Planktic foraminifers, Salinity, Temperature",

author = "B{\"a}rbel H{\"o}nisch and Allen, {Katherine A.} and Russell, {Ann D.} and Eggins, {Stephen M.} and Jelle Bijma and Spero, {Howard J.} and Lea, {David W.} and Jimin Yu",

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AU - Hönisch, Bärbel

AU - Allen, Katherine A.

AU - Russell, Ann D.

AU - Eggins, Stephen M.

AU - Bijma, Jelle

AU - Spero, Howard J.

AU - Lea, David W.

AU - Yu, Jimin

PY - 2011/4

Y1 - 2011/4

N2 - Recent studies have used the Ba/Ca ratio of planktic foraminifer shells as a proxy for river run-off at oceanic sites near estuaries. Such studies assume that the Ba/Ca ratio in planktic foraminifer shells is primarily controlled by the Ba/Ca concentration of seawater and that other parameters such as salinity, temperature and pH do not compromise the primary Ba concentration relationship. Here we provide new insights from culture experiments and review published studies to confirm that environmental parameters including pH, temperature, salinity, and symbiont photosynthesis do not affect Ba substitution into planktic foraminiferal calcite. The partition coefficient for Ba in spinose planktic foraminifers is estimated as DBa=0.15±0.05 (95% confidence limits). The same factor also seems applicable to the non-spinose genus Neogloboquadrina but not to specimens of the non-spinose genus Globorotalia.

AB - Recent studies have used the Ba/Ca ratio of planktic foraminifer shells as a proxy for river run-off at oceanic sites near estuaries. Such studies assume that the Ba/Ca ratio in planktic foraminifer shells is primarily controlled by the Ba/Ca concentration of seawater and that other parameters such as salinity, temperature and pH do not compromise the primary Ba concentration relationship. Here we provide new insights from culture experiments and review published studies to confirm that environmental parameters including pH, temperature, salinity, and symbiont photosynthesis do not affect Ba substitution into planktic foraminiferal calcite. The partition coefficient for Ba in spinose planktic foraminifers is estimated as DBa=0.15±0.05 (95% confidence limits). The same factor also seems applicable to the non-spinose genus Neogloboquadrina but not to specimens of the non-spinose genus Globorotalia.

KW - Culturing

KW - D

KW - PH

KW - Planktic foraminifers

KW - Salinity

KW - Temperature

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DO - 10.1016/j.marmicro.2011.01.003

M3 - Article

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SP - 52

EP - 57

JO - Marine Micropaleontology

JF - Marine Micropaleontology

IS - 1-2

ER -

Planktic foraminifers as recorders of seawater Ba/Ca

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