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Calcium isotopic ecology of Turkana Basin hominins

Article scientifique 2020 Anglais

Résumé

Abstract Diet is a major driver of hominin evolution, but most of the geochemical evidence relies on carbon isotopes (δ 13 C). Here, we report enamel stable calcium isotope (δ 44/42 Ca) values against δ 13 C values for several hominins and co-existing primates in the Turkana Basin area, circa 4 to 2 Ma. Australopithecus anamensis clusters with mammal browsers, Kenyanthropus platyops is distinct from A . anamensis in foraging into more open environments and the coexisting Theropithecus brumpti encompasses both the grazer and omnivore/carnivore domains. Early Homo is remarkable for its wide distribution in δ 44/42 Ca values, possibly reflecting omnivorous and opportunistic preferences. Paranthropus boisei is uniquely distributed in the δ 13 C versus δ 44/42 Ca iso-space being distinct from all other hominins from the Turkana Basin area as well as from the co-existing Theropithecus oswaldi . Several hypotheses are explored to discuss the unique δ 44/42 Ca values of Paranthropus boisei including significant differences observed with δ 44/42 Ca values recently reported for P . robustus from South Africa, questioning the monophyly of this genus.

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Martin, J., Tacail, T., Braga, J., Cerling, T., Balter, V. (2020). Calcium isotopic ecology of Turkana Basin hominins. https://doi.org/10.1038/s41467-020-17427-7

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Auteur(s)

Jeremy E. Martin Théo Tacail José Braga Thure E. Cerling Vincent Balter

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