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dc.contributor.authorSperling, Erik A.
dc.contributor.authorFrieder, Christina A.
dc.contributor.authorRaman, Akkur V.
dc.contributor.authorGirguis, Peter R.
dc.contributor.authorLevin, Lisa A.
dc.contributor.authorKnoll, Andrew Herbert
dc.date.accessioned2014-06-18T18:12:22Z
dc.date.issued2013
dc.identifier.citationSperling, Erik A., Christina A. Frieder, Akkur V. Raman, Peter R. Girguis, Lisa A. Levin, and Andrew H. Knoll. 2013. Oxygen, Ecology, and the Cambrian Radiation of Animals. Proceedings of the National Academy of Sciences 110, no. 33: 13446–13451.en_US
dc.identifier.issn1091-6490en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:12336338
dc.description.abstractThe Proterozoic-Cambrian transition records the appearance of essentially all animal body plans (phyla), yet to date no single hypothesis adequately explains both the timing of the event and the evident increase in diversity and disparity. Ecological triggers focused on escalatory predator–prey “arms races” can explain the evolutionary pattern but not its timing, whereas environmental triggers, particularly ocean/atmosphere oxygenation, do the reverse. Using modern oxygen minimum zones as an analog for Proterozoic oceans, we explore the effect of low oxygen levels on the feeding ecology of polychaetes, the dominant macrofaunal animals in deep-sea sediments. Here we show that low oxygen is clearly linked to low proportions of carnivores in a community and low diversity of carnivorous taxa, whereas higher oxygen levels support more complex food webs. The recognition of a physiological control on carnivory therefore links environmental triggers and ecological drivers, providing an integrated explanation for both the pattern and timing of Cambrian animal radiation.en_US
dc.description.sponsorshipEarth and Planetary Sciencesen_US
dc.description.sponsorshipOrganismic and Evolutionary Biologyen_US
dc.language.isoen_USen_US
dc.publisherProceedings of the National Academy of Sciencesen_US
dc.relation.isversionofdoi:10.1073/pnas.1312778110en_US
dash.licenseLAA
dc.subjectevolutionen_US
dc.subjecthypoxiaen_US
dc.subjectEdiacaranen_US
dc.subjectMetazoaen_US
dc.titleOxygen, Ecology, and the Cambrian Radiation of Animalsen_US
dc.typeJournal Articleen_US
dc.description.versionAccepted Manuscripten_US
dc.relation.journalProceedings of the National Academy of Sciencesen_US
dash.depositing.authorKnoll, Andrew Herbert
dash.waiver2013-07-09
dc.date.available2014-06-18T18:12:22Z
dc.identifier.doi10.1073/pnas.1312778110*
workflow.legacycommentsFAR 2014en_US
dash.contributor.affiliatedSperling, Erik A.
dash.contributor.affiliatedKnoll, Andrew
dash.contributor.affiliatedGirguis, Peter


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