Mid Pleistocene foraminiferal mass extinction coupled with phytoplankton evolution

Kender, Sev, McClymont, Erin L., Elmore, Aurora C., Emanuele, Dario, Leng, Melanie J. and Elderfield, Henry (2016) Mid Pleistocene foraminiferal mass extinction coupled with phytoplankton evolution. Nature Communications, 7 . 11970/1-11970/8. ISSN 2041-1723

Full text not available from this repository.

Abstract

Understanding the interaction between climate and biotic evolution is crucial for deciphering the sensitivity of life. An enigmatic mass extinction occurred in the deep oceans during the Mid Pleistocene, with a loss of over 100 species (20%) of sea floor calcareous foraminifera. An evolutionarily conservative group, benthic foraminifera often comprise 450% of eukaryotebiomass on the deep-ocean floor. Here we test extinction hypotheses (temperature corrosiveness and productivity) in the Tasman Sea, using geochemistry and micropalaeontology and find evidence from several globally distributed sites that the extinction was caused by a change in phytoplankton food source. Coccolithophore evolution may have enhanced the seasonal ‘bloom’ nature of primary productivity and fundamentally shifted it towards a more intra-annually variable state at B0.8 Ma. Our results highlight intra-annual variability as a potential new consideration for Mid Pleistocene global biogeochemical climate models, and imply that deep-sea biota may be sensitive to future changes in productivity.

Item Type: Article
RIS ID: https://nottingham-repository.worktribe.com/output/794622
Keywords: Earth sciences, Climate science, Ecology, Oceanography
Schools/Departments: University of Nottingham, UK > Faculty of Social Sciences > School of Geography
Identification Number: https://doi.org/10.1038/ncomms11970
Depositing User: Eprints, Support
Date Deposited: 07 Jul 2016 10:08
Last Modified: 04 May 2020 17:56
URI: https://eprints.nottingham.ac.uk/id/eprint/34725

Actions (Archive Staff Only)

Edit View Edit View