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Rapid megafaunal extinction following human arrival throughout the New World

journal contribution
posted on 2023-05-17, 20:56 authored by Christopher JohnsonChristopher Johnson, Bradshaw, CJA, Cooper, A, Gillespie, R, Brook, BW
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.

History

Publication title

Quaternary International

Volume

308-309

Pagination

273-277

ISSN

1040-6182

Department/School

School of Natural Sciences

Publisher

Pergamon

Place of publication

Oxford, UK

Rights statement

Copyright 2013 Elsevier Ltd and INQUA

Repository Status

  • Restricted

Socio-economic Objectives

Terrestrial biodiversity

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