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Increases in reef size, habitat and metacommunity complexity associated with Cambrian radiation oxygenation pulses

Author

Listed:
  • Andrey Yu. Zhuravlev

    (Lomonosov Moscow State University Leninskie Gory 1(12))

  • Emily G. Mitchell

    (University of Cambridge, Museum of Zoology)

  • Fred Bowyer

    (University of Edinburgh)

  • Rachel Wood

    (University of Edinburgh)

  • Amelia Penny

    (University of St Andrews)

Abstract

Oxygenation during the Cambrian Radiation progressed via a series of short-lived pulses. However, the metazoan biotic response to this episodic oxygenation has not been quantified, nor have the causal evolutionary processes been constrained. Here we present ecological analyses of Cambrian archaeocyath sponge reef communities on the Siberian Platform (525–514 Ma). During the oxic pulse at ~521–519 Ma, we quantify reef habitat expansion coupled to an increase in reef size and metacommunity complexity, from individual within-community reactions to their local environment, to ecologically complex synchronous community-wide response, accompanied by an increase in rates of origination. Subsequently, reef and archaeocyath body size are reduced in association with increased rates of extinction due to inferred expanded marine anoxia (~519–516.5 Ma). A later oxic pulse at ~515 Ma shows further reef habitat expansion, increased archaeocyath body size and diversity, but weaker community-wide environmental responses. These metrics confirm that oxygenation events created temporary pulses of evolutionary diversification and enhanced ecosystem complexity, potentially via the expansion of habitable space, and increased archaeocyath individual and reef longevity in turn leading to niche differentiation. Most notably, we show that progression towards increasing biodiversity and ecosystem complexity was episodic and discontinuous, rather than linear, during the Cambrian Radiation.

Suggested Citation

  • Andrey Yu. Zhuravlev & Emily G. Mitchell & Fred Bowyer & Rachel Wood & Amelia Penny, 2022. "Increases in reef size, habitat and metacommunity complexity associated with Cambrian radiation oxygenation pulses," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35283-5
    DOI: 10.1038/s41467-022-35283-5
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    References listed on IDEAS

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    1. Benjamin C. Gill & Timothy W. Lyons & Seth A. Young & Lee R. Kump & Andrew H. Knoll & Matthew R. Saltzman, 2011. "Geochemical evidence for widespread euxinia in the Later Cambrian ocean," Nature, Nature, vol. 469(7328), pages 80-83, January.
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