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A culture-based calibration of benthic foraminiferal paleotemperature proxies: delta O-18 and Mg/Ca results

Filipsson, Helena LU ; Bernhard, Joan; Lincoln, Sara and McCorkle, Daniel (2010) In Biogeosciences 7(4). p.1335-1347
Abstract
Benthic foraminifera were cultured for five months at four temperatures (4, 7, 14 and 21 degrees C) to establish the temperature dependence of foraminiferal calcite delta O-18 and Mg/Ca. Two Bulimina species (B. aculeata and B. marginata) were most successful in terms of calcification, adding chambers at all four temperatures and reproducing at 7 and 14 degrees C. Foraminiferal delta O-18 values displayed ontogenetic variations, with lower values in younger individuals. The delta O-18 values of adult specimens decreased with increasing temperature in all but the 4 degrees C treatment, exhibiting a relationship consistent with previous delta O-18 paleotemperature calibration studies. Foraminiferal Mg/Ca values, determined by laser ablation... (More)
Benthic foraminifera were cultured for five months at four temperatures (4, 7, 14 and 21 degrees C) to establish the temperature dependence of foraminiferal calcite delta O-18 and Mg/Ca. Two Bulimina species (B. aculeata and B. marginata) were most successful in terms of calcification, adding chambers at all four temperatures and reproducing at 7 and 14 degrees C. Foraminiferal delta O-18 values displayed ontogenetic variations, with lower values in younger individuals. The delta O-18 values of adult specimens decreased with increasing temperature in all but the 4 degrees C treatment, exhibiting a relationship consistent with previous delta O-18 paleotemperature calibration studies. Foraminiferal Mg/Ca values, determined by laser ablation inductively coupled plasma mass spectrometry, were broadly consistent with previous Mg/Ca calibration studies, but extremely high values in the 4 degrees C treatment and higher than predicted values at two of the other three temperatures make it challenging to interpret these results. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biogeosciences
volume
7
issue
4
pages
1335 - 1347
publisher
Copernicus Publications
external identifiers
  • wos:000277185300011
  • scopus:80051484040
ISSN
1726-4189
DOI
10.5194/bg-7-1335-2010
language
English
LU publication?
yes
id
2a84b9cc-6ad3-44c8-9dc5-8611caff552f (old id 1600430)
date added to LUP
2010-06-18 11:14:33
date last changed
2018-07-15 03:06:20
@article{2a84b9cc-6ad3-44c8-9dc5-8611caff552f,
  abstract     = {Benthic foraminifera were cultured for five months at four temperatures (4, 7, 14 and 21 degrees C) to establish the temperature dependence of foraminiferal calcite delta O-18 and Mg/Ca. Two Bulimina species (B. aculeata and B. marginata) were most successful in terms of calcification, adding chambers at all four temperatures and reproducing at 7 and 14 degrees C. Foraminiferal delta O-18 values displayed ontogenetic variations, with lower values in younger individuals. The delta O-18 values of adult specimens decreased with increasing temperature in all but the 4 degrees C treatment, exhibiting a relationship consistent with previous delta O-18 paleotemperature calibration studies. Foraminiferal Mg/Ca values, determined by laser ablation inductively coupled plasma mass spectrometry, were broadly consistent with previous Mg/Ca calibration studies, but extremely high values in the 4 degrees C treatment and higher than predicted values at two of the other three temperatures make it challenging to interpret these results.},
  author       = {Filipsson, Helena and Bernhard, Joan and Lincoln, Sara and McCorkle, Daniel},
  issn         = {1726-4189},
  language     = {eng},
  number       = {4},
  pages        = {1335--1347},
  publisher    = {Copernicus Publications},
  series       = {Biogeosciences},
  title        = {A culture-based calibration of benthic foraminiferal paleotemperature proxies: delta O-18 and Mg/Ca results},
  url          = {http://dx.doi.org/10.5194/bg-7-1335-2010},
  volume       = {7},
  year         = {2010},
}