Southern Ocean phytoplankton turnover in response to stepwise Antarctic cooling over the past 15 million years

Based on data of unprecedented resolution, we show that phytoplankton (diatoms) in the Southern Ocean have experienced five major pulses of species extinction and origination over the past 15 My that were linked to large cooling transitions in southern high latitudes. Our findings suggest that phyto...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences
Main Authors: Crampton, James S., Cody, Rosie D., Levy, Richard, Harwood, David, McKay, Robert, Naish, Tim R.
Format: Text
Language:English
Published: National Academy of Sciences 2016
Subjects:
Physical Sciences
Antarctic
Southern Ocean
Antarc*
Antarctica
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4922175/
http://www.ncbi.nlm.nih.gov/pubmed/27274061
https://doi.org/10.1073/pnas.1600318113
Description
Summary:Based on data of unprecedented resolution, we show that phytoplankton (diatoms) in the Southern Ocean have experienced five major pulses of species extinction and origination over the past 15 My that were linked to large cooling transitions in southern high latitudes. Our findings suggest that phytoplankton communities around Antarctica have been robust to “baseline” glacial–interglacial climate variability but were sensitive to large-scale changes in mean climate state driven by a combination of long-period variations in orbital forcing and atmospheric carbon dioxide perturbations.

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