Abstract
The specific mechanisms causing extinction and faunal turnover after the impact of an asteroid at the Cretaceous–Palaeogene (K–Pg) boundary, and the palaeogeographical variability of the biotic response, are not well understood. In order to evaluate causes of extinction and compare the biotic turnover of deep-sea benthic foraminifera at high southern latitudes with that at globally distributed sites, we analysed benthic foraminiferal assemblages at Southern Ocean ODP Site 690 on Maud Rise, Antarctica. Proxies for export productivity and the species composition of benthic assemblages indicate that the food supply to the seafloor did not change significantly, but diversity and evenness decreased for several hundred thousand years. This transient assemblage change may have been caused by the extinction of pelagic calcifiers, either directly because of the changed nature of the organic flux, or indirectly, because the sharp decline in pelagic carbonate flux to the deep-sea floor caused carbonate oversaturation of deep waters, leading to an increased abundance of large, thick-walled and heavily calcified species.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Alegret, L., Thomas, E., & Lohmann, K. C. (2012). End-Cretaceous marine mass extinction not caused by productivity collapse. Proceedings of the National Academy of Sciences,109(3), 728–732.
Bown, P. (2005). Selective calcareous nannoplankton survivorship at the Cretaceous-Tertiary boundary. Geology,33, 653–656.
Bremer, M. L., & Lohmann, G. P. (1982). Evidence for primary control of the distribution of certain Atlantic Ocean benthonic foraminifera by degree of carbonate saturation. Deep-Sea Research,29, 987–998.
Caldeira, K., & Rampino, M. R. (1993). Aftermath of the end-Cretaceous mass extinction: Possible biogeochemical stabilization of the carbon cycle and climate. Paleoceanography,8, 515–525.
Duarte, C. M., Hendriks, I. E., Moore, T. S., Olsen, Y. S., Steckbauer, A., Ramajo, L., et al. (2013). Is ocean acidification an open-ocean syndrome? understanding anthropogenic impacts on seawater. Estuaries and Coasts,36, 221–236.
Elliot, D. H., Askin, R. A., Kyte, F. T., & Zinsmeister, W. J. (1994). Iridium and dinocysts at the Cretaceous-Tertiary boundary on Seymour Island, Antarctica: Implications for the K-T event. Geology,22, 675–678.
Fütterer, D. K. (1990). Distribution of calcareous dinoflagellates at the Cretaceous–Tertiary boundary of Queen Maud Rise, Eastern Weddell Sea, Antarctica (ODP Leg 113). In P. F. Barker & J. P. Kennett et al., Proceedings of ODP, Science Results (pp. 533–548). 113, College Station: TX (Ocean Drilling Program).
Hildebrand-Habel, T., & Streng, M. (2003). Calcareous dinoflagellate associations and Maastrichtian-Tertiary climatic change in a high latitude core (ODP Hole 689B, Maud Rise, Weddell Sea). Palaeogeography, Palaeoclimatology, Palaeoecology,197, 293–321.
Hull P. M., & Norris R. D. (2011). Diverse patterns of ocean export productivity change across the Cretaceous–Paleogene boundary: new insights from biogenic barium. Paleoceanography, 26(3), PA3205. doi: 10.1029/2010PA002082.
Jiang, S., Bralower, T. J., Patzkowsky, M. E., Kump, L. R., & Schueth, J. D. (2010). Geographic controls on nannoplankton extinction across the Cretaceous/Palaeogene boundary. Nature Geoscience,. doi:10.1038/NGEO775.
Liu, C., & Olsson, R. K. (1992). Evolutionary radiation of microperforate planktonic foraminifera following the K/T mass extinction event. Journal of Foraminiferal Research,4, 328–346.
Ridgwell, A. (2005). A Mid Mesozoic revolution in the regulation of ocean chemistry. Marine Geology,217, 339–357.
Thomas, E. (1990). Late Cretaceous–early Eocene mass extinctions in the deep sea. Geological Society of America Special Publication,247, 481–495.
Zeebe, R. R., & Westbroek, P. (2003). A simple model for the saturation state of the ocean: the “Strangelove”, the “Neritan” and the “Cretan” Ocean. Geochemistry, Geophysics, Geosystems,4(12), 1104. doi:10.1029/2003GC000538.
Acknowledgments
This research was funded by Consolider CGL 2007-63724 and CGL2011-23077 (Spanish Ministry of Science and Innovation-FEDER). ET acknowledges funding by the Leverhulme Trust (UK) and NSF OCE-720049.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Alegret, L., Thomas, E. (2014). Benthic Foraminifera, Food Supply, and Carbonate Saturation Across the Cretaceous–Palaeogene Boundary: Southern Ocean Site 690. In: Rocha, R., Pais, J., Kullberg, J., Finney, S. (eds) STRATI 2013. Springer Geology. Springer, Cham. https://doi.org/10.1007/978-3-319-04364-7_13
Download citation
DOI: https://doi.org/10.1007/978-3-319-04364-7_13
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-04363-0
Online ISBN: 978-3-319-04364-7
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)