UV radiation limited the expansion of cyanobacteria in early marine photic environments

Aleksandra M. Mloszewska (), Devon B. Cole, Noah J. Planavsky, Andreas Kappler, Denise S. Whitford, George W. Owttrim and Kurt. O Konhauser ()
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Aleksandra M. Mloszewska: University of Toronto
Devon B. Cole: Yale University
Noah J. Planavsky: Yale University
Andreas Kappler: University of Tübingen
Denise S. Whitford: University of Alberta
George W. Owttrim: University of Alberta
Kurt. O Konhauser: University of Alberta

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Prior to atmospheric oxygenation, ecosystems were exposed to higher UV radiation fluxes relative to modern surface environments. Iron–silica mineral coatings have been evoked as effective UV radiation shields in early terrestrial settings. Here we test whether similar protection applied to planktonic cyanobacteria within the Archean water column. Based on experiments done under Archean seawater conditions, we report that Fe(III)–Si-rich precipitates absorb up to 70% of incoming UV-C radiation, with a reduction of

Date: 2018
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DOI: 10.1038/s41467-018-05520-x

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