Cited by 49Paleontology and Stratigraphy of FossilsOrigins and Evolution of LifeEvolution and Paleontology Studies

Mid-Proterozoic redox evolution and the possibility of transient oxygenation events

Diamond, Charles W., Lyons, Timothy W.·2018·Emerging Topics in Life Sciences

Abstract

It is often assumed that rising environmental oxygen concentrations played a significant role in the timing of the first appearance of animals and the trajectory of their early proliferation and diversification. The inherent large size and complexity of animals come with large energy requirements — levels of energy that can best, if not only, be acquired through aerobic respiration. There is also abundant geochemical evidence for an increase in ocean–atmosphere O2 concentrations in temporal proximity with the emergence of the group. To adequately test this hypothesis, however, a thorough understanding of the history of environmental oxygenation in the time between the first appearance of eukaryotes and the eventual appearance of animals is necessary. In this review, we summarize the evidence for the prevailing long-term conditions of the Proterozoic Eon prior to the emergence of Metazoa and go on to highlight multiple independent geochemical proxy records that suggest at least two transient oxygenation events — at ca. 1.4 and ca. 1.1 billion years ago (Ga) — during this time. These emerging datasets open the door to an important possibility: while prevailing conditions during much of this time would likely have presented challenges for early animals, there were intervals when oxygenated conditions were more widespread and could have favored yet undetermined advances in eukaryotic innovation, including critical early steps toward animal evolution.

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Crossref · 10.1042/etls20170146

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  • Tectonic models related to rifting during breakup of the Nuna supercontinent at ∼1.4 Ga could provide a mechanism for periods of enhanced organic burial and related transient oxygenation.

    “Tectonic models during this interval as specifically related to rifting during breakup of the Nuna supercontinent at ∼1.4 Ga could provide a mechanism for periods of enhanced organic burial and related transient oxygenation (Zhang et al., 2012; Canfield et al., 2018; Diamond and Lyons, 2018; Large et al., 2019; Steadman et al., 2020).”

    From Oxygenation, Life, and the Planetary System during Earth's Middle History: An Overview (2021) · cites this paper as Diamond and Lyons, 2018

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Authors
Diamond, C. W., & Lyons, T. W.
Affiliations
University of California, Riverside (US)
Corresponding author
Diamond, Charles W.
Venue
Emerging Topics in Life Sciences
Published
2018-07-13
Volume
2
Issue
2
Pages
235-245
ISSN
  • 2397-8554 (ISSN-L)
  • 2397-8562
OpenAlex
W2883969747
Cited by
49
References
92
Citations by year
2025: 3 · 2024: 7 · 2023: 4 · 2022: 9 · 2021: 10 · 2020: 11 · 2019: 4 · 2018: 1
FWCI
4.79
Type
journal article
Language
en
Open access
closed
Locations
  • Emerging Topics in Life Sciences (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • NASA Astrobiology Institute
  • Science Mission Directorate
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Origins and Evolution of Life
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
Keywords
early animal evolution, Ediacaran, Neoproterozoic, ocean oxygenation, eukaryotic evolution, geochemical proxies, aerobic respiration, origin of animals

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