Investigating relationships among strontium, barium, and seasonality in wild baboons
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Austin, Christine
Arora, Manish
Avila, Janaina N
Beamish, Esme K
Dirks, Wendy
Green, Daniel R
Leonard, Nicole D
McGraw, W Scott
Swedell, Larissa
Williams, Ian S
Zhao, Jian-xin
Smith, Tanya M
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Abstract
Geochemical profiles of Australopithecus africanus and baboon teeth show fluctuating trace elements, possibly reflecting seasonal diets. Here we use laser ablation–inductively coupled plasma–mass spectrometric measurements of calcium-normalized strontium and barium ratios (Sr/Ca and Ba/Ca) and ion microprobe analyses of oxygen isotopes (δ18O) to contrast elemental changes with seasonal rainfall in wild baboons. We employ 16 teeth from 11 South African, Ethiopian, and Ugandan individuals. Changes in Sr/Ca and Ba/Ca ratios are not consistently linked to wet or dry seasons. Additional studies are needed to identify sources of Sr and Ba, and what such patterns can tell us about seasonal behaviour.
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Archaeometry
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DP210101913
FT200100390
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© 2025 The Author(s). Archaeometry published by John Wiley & Sons Ltd on behalf of University of Oxford. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
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Archaeology
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Bharatiya, M; Austin, C; Arora, M; Avila, JN; Beamish, EK; Dirks, W; Green, DR; Leonard, ND; McGraw, WS; Swedell, L; Williams, IS; Zhao, J-X; Smith, TM, Investigating relationships among strontium, barium, and seasonality in wild baboons, Archaeometry, 2025