Rapid megafaunal extinction following human arrival throughout the new world

Johnson Christopher, Corey Bradshaw, Alan Cooper, Richard Gillespie, Barry Brook

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)


    Lima-Ribeiro and Diniz-Filho (2013) present a new compilation and analysis of the chronologies of human arrival and megafaunal extinction throughout the Americas. They find that in many places megafauna were apparently extinct before humans arrived; in many others, megafauna coexisted with humans for thousands of years before going extinct. They conclude that human impact made at most a minor and geographically restricted contribution to megafaunal extinction. We argue that Lima-Ribeiro and Diniz-Filho's (2013) conclusions are unreliable because they have not adequately accounted for uncertainties and biases that affect the estimation of extinction dates from fossil data and human-arrival dates from archeological data. We re-analyze their data taking these problems into account, and reach the opposite conclusion to theirs: extinction consistently followed human arrival with a delay of around one or two thousand years, in agreement with the overkill model of megafaunal extinction.

    Original languageEnglish
    Pages (from-to)273-277
    Number of pages5
    JournalQuaternary International
    Publication statusPublished - 2013


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