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Food mechanical properties and isotopic signatures in forest versus savannah dwelling eastern chimpanzees

van Casteren, A, Oelze, VM, Angedakin, S, Kalan, AK, Kambi, M, Boesch, C, Kuhl, HS, Langergraber, KE, Piel, AK, Stewart, FA and Kupczik, K (2018) Food mechanical properties and isotopic signatures in forest versus savannah dwelling eastern chimpanzees. Communications Biology. ISSN 2399-3642

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Open Access URL: https://dx.doi.org/10.1038/s42003-018-0115-6 (Published version)


Chimpanzees are traditionally described as ripe fruit specialists with large incisors but relatively small postcanine teeth, adhering to a somewhat narrow dietary niche. Field observations and isotopic analyses suggest that environmental conditions greatly affect habitat resource utilization by chimpanzee populations. Here we combine measures of dietary mechanics with stable isotope signatures from eastern chimpanzees living in tropical forest (Ngogo, Uganda) and savannah woodland (Issa Valley, Tanzania). We show that foods at Issa can present a considerable mechanical challenge, most saliently in the external tissues of savannah woodland plants compared to their tropical forest equivalents. This pattern is concurrent with different isotopic signatures between sites. These findings demonstrate that chimpanzee foods in some habitats are mechanically more demanding than previously thought, elucidating the broader evolutionary constraints acting on chimpanzee dental morphology. Similarly, these data can help clarify the dietary mechanical landscape of extinct hominins often overlooked by broad C3/C4 isotopic categories.

Item Type: Article
Subjects: Q Science > QL Zoology
Divisions: Natural Sciences & Psychology (closed 31 Aug 19)
Publisher: Nature Publishing Group
Date Deposited: 31 Jul 2018 10:47
Last Modified: 03 Sep 2021 21:05
URI: https://researchonline.ljmu.ac.uk/id/eprint/9045
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