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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ftdryad:oai:v1.datadryad.org:10255/dryad.37963 2023-05-15T18:00:29+02:00 Data from: Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis Birch, Heather S. Coxall, Helen K. Pearson, Paul N. Early Paleocene 2012-02-22T19:37:34Z http://hdl.handle.net/10255/dryad.37963 https://doi.org/10.5061/dryad.5p92t38g unknown doi:10.5061/dryad.5p92t38g/1 doi:10.5061/dryad.5p92t38g/2 doi:10.1666/11027.1 doi:10.5061/dryad.5p92t38g Birch HS, Coxall HK, Pearson PN (2012) Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis. Paleobiology 38(3): 374-390. http://hdl.handle.net/10255/dryad.37963 Planktonic foraminifera Ecology Photosymbiosis Metabolic fractionation Cretaceous/Paleogene boundary Article 2012 ftdryad https://doi.org/10.5061/dryad.5p92t38g https://doi.org/10.5061/dryad.5p92t38g/1 https://doi.org/10.5061/dryad.5p92t38g/2 https://doi.org/10.1666/11027.1 2020-01-01T14:55:44Z 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. Article in Journal/Newspaper Planktonic foraminifera Dryad Digital Repository (Duke University) |
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Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Planktonic foraminifera Ecology Photosymbiosis Metabolic fractionation Cretaceous/Paleogene boundary |
spellingShingle |
Planktonic foraminifera Ecology Photosymbiosis 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 Ecology Photosymbiosis 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. |
format |
Article in Journal/Newspaper |
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 |
publishDate |
2012 |
url |
http://hdl.handle.net/10255/dryad.37963 https://doi.org/10.5061/dryad.5p92t38g |
op_coverage |
Early Paleocene |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
doi:10.5061/dryad.5p92t38g/1 doi:10.5061/dryad.5p92t38g/2 doi:10.1666/11027.1 doi:10.5061/dryad.5p92t38g Birch HS, Coxall HK, Pearson PN (2012) Evolutionary ecology of Early Paleocene planktonic foraminifera: size, depth habitat and symbiosis. Paleobiology 38(3): 374-390. http://hdl.handle.net/10255/dryad.37963 |
op_doi |
https://doi.org/10.5061/dryad.5p92t38g https://doi.org/10.5061/dryad.5p92t38g/1 https://doi.org/10.5061/dryad.5p92t38g/2 https://doi.org/10.1666/11027.1 |
_version_ |
1766169595644739584 |