Dietary reconstruction of Pleistocene Australian herbivore megafauna using δ44/42Ca and 87Sr/86Sr in fossil enamel

Koutamanis, Dafne S.; Dosseto, Anthony; Tacail, Théo; McCurry, Matthew

doi:10.46427/gold2022.10653

Goldschmidt2022 Abstracts 2022

DOI: 10.46427/gold2022.10653

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Dietary reconstruction of Pleistocene Australian herbivore megafauna using δ^44/42Ca and ⁸⁷Sr/⁸⁶Sr in fossil enamel

Dafne S. Koutamanis¹,

Anthony Dosseto²,

Théo Tacail³

et al.

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2023

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“…Data accessibility. All data are provided in the electronic supplementary material [67]. Declaration of AI use.…”

mentioning

confidence: 99%

Reconstructing Pleistocene Australian herbivore megafauna diet using calcium and strontium isotopes

Koutamanis,

McCurry,

Tacail

et al. 2023

R. Soc. open sci.

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Isotopes in fossil tooth enamel provide robust tools for reconstructing food webs, which have been understudied in Australian megafauna. To delineate the isotopic composition of primary consumers and understand dietary behaviour at the base of the food web, we investigate calcium (Ca) and strontium (Sr) isotope compositions of Pleistocene marsupial herbivores from Wellington Caves and Bingara (New South Wales, Australia). Sr isotopes suggest small home ranges across giant and smaller marsupial herbivores. Ca isotopes in Pleistocene marsupial herbivores cover the same range as those in modern wombats and placental herbivores. Early forming teeth are depleted in heavy Ca isotopes compared to late-forming teeth of a given individual, suggesting a weaning signal. Distinct Ca compositions between taxa can be interpreted as dietary niches. Some niches conform to previous dietary reconstructions of taxa, while others provide new insights into niche differentiation across Australian herbivores. Combined with the small roaming ranges suggested by Sr isotopes, the Ca isotope niche diversity suggests rich ecosystems, supporting a diversity of taxa with various diets in a small area.

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“…Data accessibility. All data are provided in the electronic supplementary material [67]. Declaration of AI use.…”

mentioning

confidence: 99%

Reconstructing Pleistocene Australian herbivore megafauna diet using calcium and strontium isotopes

Koutamanis,

McCurry,

Tacail

et al. 2023

R. Soc. open sci.

View full text Add to dashboard Cite

show abstract

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Dietary reconstruction of Pleistocene Australian herbivore megafauna using δ^44/42Ca and ⁸⁷Sr/⁸⁶Sr in fossil enamel

Cited by 1 publication

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Reconstructing Pleistocene Australian herbivore megafauna diet using calcium and strontium isotopes

Reconstructing Pleistocene Australian herbivore megafauna diet using calcium and strontium isotopes

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