Nannoplankton extinction and origination across the Paleocene-Eocene Thermal Maximum

Samantha J. Gibbs, Paul R. Bown, Jocelyn A. Sessa, Timothy Bralower, Paul A. Wilson

Research output: Contribution to journalArticlepeer-review

164 Scopus citations


The Paleocene-Eocene Thermal Maximum (PETM, ∼55 million years ago) was an interval of global warming and ocean acidification attributed to rapid release and oxidation of buried carbon. We show that the onset of the PETM coincided with a prominent increase in the origination and extinction of calcareous phytoplankton. Yet major perturbation of the surface-water saturation state across the PETM was not detrimental to the survival of most calcareous nannoplankton taxa and did not impart a calcification or ecological bias to the pattern of evolutionary turnover. Instead, the rate of environmental change appears to have driven turnover, preferentially affecting rare taxa living close to their viable limits.

Original languageEnglish (US)
Pages (from-to)1770-1773
Number of pages4
Issue number5806
StatePublished - Dec 15 2006

All Science Journal Classification (ASJC) codes

  • General


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