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Lookup NU author(s): Professor Simon Poulton
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Because animals require oxygen, an increase in late-Neoproterozoic oxygen concentrations has been suggested as a stimulus for their evolution. The iron content of deep-sea sediments shows that the deep ocean was anoxic and ferruginous before and during the Gaskiers glaciation 580 million years ago and that it became oxic afterward. The first known members of the Ediacara biota arose shortly after the Gaskiers glaciation, suggesting a causal link between their evolution and this oxygenation event. A prolonged stable oxic environment may have permitted the emergence of bilateral motile animals some 25 million years later.
Author(s): Canfield DE, Poulton SW, Narbonne GM
Publication type: Article
Publication status: Published
Journal: Science
Year: 2007
Volume: 315
Issue: 5808
Pages: 92-95
ISSN (print): 0036-8075
ISSN (electronic): 1095-9203
Publisher: American Association for the Advancement of Science
URL: http://dx.doi.org/10.1126/science.1135013
DOI: 10.1126/science.1135013
PubMed id: 17158290
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