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Foster, Laura C; Schmidt, Daniela N; Thomas, Ellen; Arndt, Sandra; Ridgwell, Andy (2013): Tomographic measurements of O. umbonatus and N. truempyi during the PETM and ETM-2 at ODP Sites 208-1262 and 208-1263 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.817802, Supplement to: Foster, LC et al. (2013): Surviving rapid climate change in the deep sea during the Paleogene hyperthermals. Proceedings of the National Academy of Sciences of the United States of America, 110(23), 9273-9276, https://doi.org/10.1073/pnas.1300579110

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Published: 2013-08-09 • DOI registered: 2013-09-09

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Abstract:
Predicting the impact of ongoing anthropogenic CO2 emissions on calcifying marine organisms is complex, owing to the synergy between direct changes (acidification) and indirect changes through climate change (e.g., warming, changes in ocean circulation, and deoxygenation). Laboratory experiments, particularly on longer-lived organisms, tend to be too short to reveal the potential of organisms to acclimatize, adapt, or evolve and usually do not incorporate multiple stressors. We studied two examples of rapid carbon release in the geological record, Eocene Thermal Maximum 2 (~53.2 Ma) and the Paleocene Eocene Thermal Maximum (PETM, ~55.5 Ma), the best analogs over the last 65 Ma for future ocean acidification related to high atmospheric CO2 levels. We use benthic foraminifers, which suffered severe extinction during the PETM, as a model group. Using synchrotron radiation X-ray tomographic microscopy, we reconstruct the calcification response of survivor species and find, contrary to expectations, that calcification significantly increased during the PETM. In contrast, there was no significant response to the smaller Eocene Thermal Maximum 2, which was associated with a minor change in diversity only. These observations suggest that there is a response threshold for extinction and calcification response, while highlighting the utility of the geological record in helping constrain the sensitivity of biotic response to environmental change.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -28.196231 * Median Longitude: 2.478945 * South-bound Latitude: -28.533230 * West-bound Longitude: 1.577000 * North-bound Latitude: -27.185833 * East-bound Longitude: 2.779700
Date/Time Start: 2003-03-24T00:00:00 * Date/Time End: 2003-04-05T10:15:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Foster, LC; Schmidt, DN; Thomas, E et al. (2013): (Table S1b) Measured tomographic parameters for Oridorsalis umbonatus during the PETM for ODP Site 208-1262. https://doi.org/10.1594/PANGAEA.817796
  2. Foster, LC; Schmidt, DN; Thomas, E et al. (2013): (Table S3a) Benthic foraminiferal rarefied diversity during the PETM for ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.817800
  3. Foster, LC; Schmidt, DN; Thomas, E et al. (2013): (Table S1c) Measured tomographic parameters for Nuttallides truempyi during the PETM for ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.817798
  4. Foster, LC; Schmidt, DN; Thomas, E et al. (2013): (Table S1d) Measured tomographic parameters for Oridorsalis umbonatus during ETM-2 for ODP Holes 208-1263C and 208-1262A. https://doi.org/10.1594/PANGAEA.817799
  5. Foster, LC; Schmidt, DN; Thomas, E et al. (2013): (Table S3b) Benthic foraminiferal rarefied diversity during the ETM2 for ODP Hole 208-1263C. https://doi.org/10.1594/PANGAEA.817801
  6. Foster, LC; Schmidt, DN; Thomas, E et al. (2013): (Table S1a) Measured tomographic parameters for Oridorsalis umbonatus during the PETM for ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.817795