Coccolithophore calcification response to past ocean acidification and climate change

Sarah A. O'Dea, Samantha J. Gibbs*, Paul R. Bown, Jeremy R. Young, Alex J. Poulton, Cherry Newsam, Paul A. Wilson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)


Anthropogenic carbon dioxide emissions are forcing rapid ocean chemistry changes and causing ocean acidification (OA), which is of particular significance for calcifying organisms, including planktonic coccolithophores. Detailed analysis of coccolithophore skeletons enables comparison of calcite production in modern and fossil cells in order to investigate biomineralization response of ancient coccolithophores to climate change. Here we show that the two dominant coccolithophore taxa across the Paleocene-Eocene Thermal Maximum (PETM) OA global warming event (∼56 million years ago) exhibited morphological response to environmental change and both showed reduced calcification rates. However, only Coccolithus pelagicus exhibits a transient thinning of coccoliths, immediately before the PETM, that may have been OA-induced. Changing coccolith thickness may affect calcite production more significantly in the dominant modern species Emiliania huxleyi, but, overall, these PETM records indicate that the environmental factors that govern taxonomic composition and growth rate will most strongly influence coccolithophore calcification response to anthropogenic change.

Original languageEnglish
Article number5363
JournalNature Communications
Publication statusPublished - 2014

ASJC Scopus subject areas

  • General Biochemistry,Genetics and Molecular Biology
  • General Chemistry
  • General Physics and Astronomy
  • General Medicine


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