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Integrated records of environmental change and evolution challenge the Cambrian Explosion.
Nat Ecol Evol. 2019 04; 3(4):528-538.NE

Abstract

The 'Cambrian Explosion' describes the rapid increase in animal diversity and abundance, as manifest in the fossil record, between ~540 and 520 million years ago (Ma). This event, however, is nested within a far more ancient record of macrofossils extending at least into the late Ediacaran at ~571 Ma. The evolutionary events documented during the Ediacaran-Cambrian interval coincide with geochemical evidence for the modernisation of Earth's biogeochemical cycles. Holistic integration of fossil and geochemical records leads us to challenge the notion that the Ediacaran and Cambrian worlds were markedly distinct, and places biotic and environmental change within a longer-term narrative. We propose that the evolution of metazoans may have been facilitated by a series of dynamic and global changes in redox conditions and nutrient supply, which, potentially together with biotic feedbacks, enabled turnover events that sustained multiple phases of radiation. We argue that early metazoan diversification should be recast as a series of successive, transitional radiations that extended from the late Ediacaran and continued through the early Palaeozoic. We conclude that while the Cambrian Explosion represents a radiation of crown-group bilaterians, it was simply one phase amongst several metazoan radiations, some older and some younger.

Authors+Show Affiliations

School of GeoSciences, University of Edinburgh, James Hutton Road, Edinburgh, UK. Rachel.Wood@ed.ac.uk.Department of Earth Sciences, University of Cambridge, Cambridge, UK.School of GeoSciences, University of Edinburgh, James Hutton Road, Edinburgh, UK.British Geological Survey, Nicker Hill, Keyworth, Nottinghamshire, UK.British Geological Survey, Nicker Hill, Keyworth, Nottinghamshire, UK. School of Earth Sciences, University of Bristol, Bristol, UK.Department of Earth Sciences, University of Cambridge, Cambridge, UK. Department of Earth Sciences, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.Department of Earth Sciences, University of Cambridge, Cambridge, UK. Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan.Department of Earth Sciences, University of Cambridge, Cambridge, UK.Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Review

Language

eng

PubMed ID

30858589

Citation

Wood, Rachel, et al. "Integrated Records of Environmental Change and Evolution Challenge the Cambrian Explosion." Nature Ecology & Evolution, vol. 3, no. 4, 2019, pp. 528-538.
Wood R, Liu AG, Bowyer F, et al. Integrated records of environmental change and evolution challenge the Cambrian Explosion. Nat Ecol Evol. 2019;3(4):528-538.
Wood, R., Liu, A. G., Bowyer, F., Wilby, P. R., Dunn, F. S., Kenchington, C. G., Cuthill, J. F. H., Mitchell, E. G., & Penny, A. (2019). Integrated records of environmental change and evolution challenge the Cambrian Explosion. Nature Ecology & Evolution, 3(4), 528-538. https://doi.org/10.1038/s41559-019-0821-6
Wood R, et al. Integrated Records of Environmental Change and Evolution Challenge the Cambrian Explosion. Nat Ecol Evol. 2019;3(4):528-538. PubMed PMID: 30858589.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Integrated records of environmental change and evolution challenge the Cambrian Explosion. AU - Wood,Rachel, AU - Liu,Alexander G, AU - Bowyer,Frederick, AU - Wilby,Philip R, AU - Dunn,Frances S, AU - Kenchington,Charlotte G, AU - Cuthill,Jennifer F Hoyal, AU - Mitchell,Emily G, AU - Penny,Amelia, Y1 - 2019/03/11/ PY - 2018/03/27/received PY - 2019/01/22/accepted PY - 2019/3/13/pubmed PY - 2019/6/14/medline PY - 2019/3/13/entrez SP - 528 EP - 538 JF - Nature ecology & evolution JO - Nat Ecol Evol VL - 3 IS - 4 N2 - The 'Cambrian Explosion' describes the rapid increase in animal diversity and abundance, as manifest in the fossil record, between ~540 and 520 million years ago (Ma). This event, however, is nested within a far more ancient record of macrofossils extending at least into the late Ediacaran at ~571 Ma. The evolutionary events documented during the Ediacaran-Cambrian interval coincide with geochemical evidence for the modernisation of Earth's biogeochemical cycles. Holistic integration of fossil and geochemical records leads us to challenge the notion that the Ediacaran and Cambrian worlds were markedly distinct, and places biotic and environmental change within a longer-term narrative. We propose that the evolution of metazoans may have been facilitated by a series of dynamic and global changes in redox conditions and nutrient supply, which, potentially together with biotic feedbacks, enabled turnover events that sustained multiple phases of radiation. We argue that early metazoan diversification should be recast as a series of successive, transitional radiations that extended from the late Ediacaran and continued through the early Palaeozoic. We conclude that while the Cambrian Explosion represents a radiation of crown-group bilaterians, it was simply one phase amongst several metazoan radiations, some older and some younger. SN - 2397-334X UR - https://www.unboundmedicine.com/medline/citation/30858589/Integrated_records_of_environmental_change_and_evolution_challenge_the_Cambrian_Explosion_ L2 - https://doi.org/10.1038/s41559-019-0821-6 DB - PRIME DP - Unbound Medicine ER -