Subdecadal phytolith and charcoal records from Lake Malawi, East Africa imply minimal effects on human evolution from the ∼74 ka Toba supereruption

Journal of Human Evolution
Chad L YostAndrew S Cohen

Abstract

The temporal proximity of the ∼74 ka Toba supereruption to a putative 100-50 ka human population bottleneck is the basis for the volcanic winter/weak Garden of Eden hypothesis, which states that the eruption caused a 6-year-long global volcanic winter and reduced the effective population of anatomically modern humans (AMH) to fewer than 10,000 individuals. To test this hypothesis, we sampled two cores collected from Lake Malawi with cryptotephra previously fingerprinted to the Toba supereruption. Phytolith and charcoal samples were continuously collected at ∼3-4 mm (∼8-9 yr) intervals above and below the Toba cryptotephra position, with no stratigraphic breaks. For samples synchronous or proximal to the Toba interval, we found no change in low elevation tree cover, or in cool climate C3 and warm season C4 xerophytic and mesophytic grass abundance that is outside of normal variability. A spike in locally derived charcoal and xerophytic C4 grasses immediately after the Toba eruption indicates reduced precipitation and die-off of at least some afromontane vegetation, but does not signal volcanic winter conditions. A review of Toba tuff petrological and melt inclusion studies suggest a Tambora-like 50 to 100 Mt SO2 atmospheric inje...Continue Reading

References

Oct 29, 2003·Journal of Human Evolution·F J Gathorne-Hardy, W E H Harcourt-Smith
Jun 10, 2005·Annals of Botany·M MadellaT Ball
Sep 6, 2007·Proceedings of the National Academy of Sciences of the United States of America·Christopher A ScholzJames Pierson
Jun 15, 1984·Science·R B Stothers
Oct 11, 2007·Proceedings of the National Academy of Sciences of the United States of America·Andrew S CohenSarah J Ivory
Jan 1, 2008·Journal of Human Evolution·Michael A Schillaci
May 12, 2009·Annals of Botany·Julio MercaderDale Walde
Mar 6, 2010·Science·Michael Balter
Mar 26, 2010·Annals of Human Biology·Michael D PetragliaChris Clarkson
Apr 30, 2010·Biology Letters·Paul VerduRenaud Vitalis
Oct 9, 2012·American Journal of Human Genetics·Jeffrey M KiddCarlos D Bustamante
Oct 19, 2012·Proceedings of the National Academy of Sciences of the United States of America·Brenna M HennMarcus W Feldman
Nov 1, 2012·Proceedings of the National Academy of Sciences of the United States of America·Michael StoreyMokhtar Saidin
Mar 26, 2013·Current Biology : CB·Qiaomei FuJohannes Krause
May 1, 2013·Proceedings of the National Academy of Sciences of the United States of America·Christine S LaneThomas C Johnson
Jun 25, 2013·Proceedings of the National Academy of Sciences of the United States of America·Richard G RobertsMichael Haslam
Oct 19, 2013·Proceedings of the National Academy of Sciences of the United States of America·Christine S LaneThomas C Johnson
Mar 15, 2015·Genome Research·Monika KarminToomas Kivisild
Jun 2, 2015·American Journal of Human Genetics·Luca PaganiChris Tyler-Smith
Jul 15, 2015·Journal of Human Evolution·Hugo Reyes-CentenoKaterina Harvati
Aug 13, 2015·Evolutionary Anthropology·Huw S GroucuttAylwyn Scally
Nov 10, 2015·Investigative Genetics·Francesca TassiGuido Barbujani
Dec 1, 2015·Scientific Reports·James U L BaldiniJim N McElwaine
Dec 9, 2015·Proceedings of the National Academy of Sciences of the United States of America·Robert P LyonsMargaret W Blome
Sep 3, 2016·Journal of Human Evolution·Véronique MichelChristopher J Bae
Sep 23, 2016·Nature·Anna-Sapfo MalaspinasEske Willerslev
Sep 23, 2016·Nature·Axel Timmermann, Tobias Friedrich
Oct 30, 2016·Proceedings of the National Academy of Sciences of the United States of America·Sarah J IvoryAndrew S Cohen
Jan 20, 2017·Nature·Rasmus NielsenEske Willerslev
Jul 21, 2017·Nature·Chris ClarksonColin Pardoe
Aug 10, 2017·Nature·K E WestawayB Sulistyanto
Oct 5, 2017·Nature Communications·Myriam KhodriMichael J McPhaden

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Citations

Jul 23, 2018·Annals of Botany·Filipe G C M da CostaClaudia P Bove
Mar 12, 2020·GeoHealth·Jerry R Schubel, Kimberly Thompson
Mar 23, 2019·Science·Paolo Papale, Warner Marzocchi
May 7, 2021·Science Advances·Jessica C ThompsonElizabeth Gomani-Chindebvu
Jul 8, 2021·Proceedings of the National Academy of Sciences of the United States of America·Benjamin A BlackCharles G Bardeen

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