Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis
The carbon stable isotope (δ13C) composition of the calcitic tests of planktonic foraminifera has an important role as a geochemical tracer of ocean carbon system changes associated with the Cretaceous/Paleogene (K/Pg) mass extinction event and its aftermath. Questions remain, however, about the ext...
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ftzenodo:oai:zenodo.org:4999939 2024-09-15T18:30:49+00:00 Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis Birch, Heather S. Coxall, Helen K. Pearson, Paul N. 2012-02-22 https://doi.org/10.5061/dryad.5p92t38g unknown Zenodo https://doi.org/10.1666/11027.1 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.5p92t38g oai:zenodo.org:4999939 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Planktonic foraminifera Foraminifera Photosymbiosis Early Paleocene Metabolic fractionation Cretaceous/Paleogene boundary info:eu-repo/semantics/other 2012 ftzenodo https://doi.org/10.5061/dryad.5p92t38g10.1666/11027.1 2024-07-25T21:46:19Z The carbon stable isotope (δ13C) composition of the calcitic tests of planktonic foraminifera has an important role as a geochemical tracer of ocean carbon system changes associated with the Cretaceous/Paleogene (K/Pg) mass extinction event and its aftermath. Questions remain, however, about the extent of δ13C isotopic disequilibrium effects and the impact of depth habitat evolution on test calcite δ13C among rapidly evolving Paleocene species, and the influence this has on reconstructed surface-to-deep ocean dissolved inorganic carbon (DIC) gradients. A synthesis of new and existing multispecies data, on the relationship between δ13C and δ18O and test size, sheds light on these issues. Results suggest that early Paleocene species quickly radiated into a range of depths habitats in a thermally stratified water column. Negative δ18O gradients with increasing test size in some species of Praemurica suggest either ontogenetic or ecotypic dependence on calcification temperature that may reflect depth/light controlled variability in symbiont photosynthetic activity. The pattern of positive δ13C test-size correlations allows us to (1) identify metabolic disequilibrium δ13C effects in small foraminifera tests, as occur in the immediate aftermath of the K/Pg event, (2) constrain the timing of evolution of foraminiferal photosymbiosis to 63.5 Ma, ∼0.9 Myr earlier than previously suggested, and (3) identify the apparent loss of symbiosis in a late-ranging morphotype of Praemurica. These findings have implications for interpreting δ13C DIC gradients at a resolution appropriate for incoming highly resolved K/Pg core records. Supplementary Figure 1 Stable isotopic signals of multiple size fractions of 13 early Paleocene planktonic foraminifera species. For each time slice, plot (1) shows δ18O against test size, plot (2) carbon δ13C against test size and plot (3) δ13C verses δ18O, (cross plots are a typical method for interpreting planktonic foraminifera depth habitats and are therefore useful for comparison of our results ... Other/Unknown Material Planktonic foraminifera Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Planktonic foraminifera Foraminifera Photosymbiosis Early Paleocene Metabolic fractionation Cretaceous/Paleogene boundary |
spellingShingle |
Planktonic foraminifera Foraminifera Photosymbiosis Early Paleocene Metabolic fractionation Cretaceous/Paleogene boundary Birch, Heather S. Coxall, Helen K. Pearson, Paul N. Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis |
topic_facet |
Planktonic foraminifera Foraminifera Photosymbiosis Early Paleocene Metabolic fractionation Cretaceous/Paleogene boundary |
description |
The carbon stable isotope (δ13C) composition of the calcitic tests of planktonic foraminifera has an important role as a geochemical tracer of ocean carbon system changes associated with the Cretaceous/Paleogene (K/Pg) mass extinction event and its aftermath. Questions remain, however, about the extent of δ13C isotopic disequilibrium effects and the impact of depth habitat evolution on test calcite δ13C among rapidly evolving Paleocene species, and the influence this has on reconstructed surface-to-deep ocean dissolved inorganic carbon (DIC) gradients. A synthesis of new and existing multispecies data, on the relationship between δ13C and δ18O and test size, sheds light on these issues. Results suggest that early Paleocene species quickly radiated into a range of depths habitats in a thermally stratified water column. Negative δ18O gradients with increasing test size in some species of Praemurica suggest either ontogenetic or ecotypic dependence on calcification temperature that may reflect depth/light controlled variability in symbiont photosynthetic activity. The pattern of positive δ13C test-size correlations allows us to (1) identify metabolic disequilibrium δ13C effects in small foraminifera tests, as occur in the immediate aftermath of the K/Pg event, (2) constrain the timing of evolution of foraminiferal photosymbiosis to 63.5 Ma, ∼0.9 Myr earlier than previously suggested, and (3) identify the apparent loss of symbiosis in a late-ranging morphotype of Praemurica. These findings have implications for interpreting δ13C DIC gradients at a resolution appropriate for incoming highly resolved K/Pg core records. Supplementary Figure 1 Stable isotopic signals of multiple size fractions of 13 early Paleocene planktonic foraminifera species. For each time slice, plot (1) shows δ18O against test size, plot (2) carbon δ13C against test size and plot (3) δ13C verses δ18O, (cross plots are a typical method for interpreting planktonic foraminifera depth habitats and are therefore useful for comparison of our results ... |
format |
Other/Unknown Material |
author |
Birch, Heather S. Coxall, Helen K. Pearson, Paul N. |
author_facet |
Birch, Heather S. Coxall, Helen K. Pearson, Paul N. |
author_sort |
Birch, Heather S. |
title |
Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis |
title_short |
Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis |
title_full |
Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis |
title_fullStr |
Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis |
title_full_unstemmed |
Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis |
title_sort |
data from: evolutionary ecology of early paleocene planktonic foraminifera: size, depth habitat and symbiosis |
publisher |
Zenodo |
publishDate |
2012 |
url |
https://doi.org/10.5061/dryad.5p92t38g |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://doi.org/10.1666/11027.1 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.5p92t38g oai:zenodo.org:4999939 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.5p92t38g10.1666/11027.1 |
_version_ |
1810472335029829632 |