ArticleProceedings of the National Academy of Sciences of the United States of America2015
Magnesium stable isotope ecology using mammal tooth enamel.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Serum Mg Isotopic Composition Reveals That Mg Dyshomeostasis Remains in Type 1 Diabetes despite the Resolution of Hypomagnesemia.International journal of molecular sciences · 2023Article
- Reconstructing Hominin Diets with Stable Isotope Analysis of Amino Acids: New Perspectives and Future Directions.Bioscience · 2022Article
- Magnesium stable isotope composition, but not concentration, responds to obesity and early insulin-resistant conditions in minipig.Scientific reports · 2022Article
- Comparative isotope ecology of western Amazonian rainforest mammals.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Isotope metallomics approaches for medical research.Cellular and molecular life sciences : CMLS · 2020Review
- Calcium isotopic ecology of Turkana Basin hominins.Nature communications · 2020Article
- Zinc isotopes in Late Pleistocene fossil teeth from a Southeast Asian cave setting preserve paleodietary information.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Calcium isotopic patterns in enamel reflect different nursing behaviors among South African early hominins.Science advances · 2019Article
- Zinc isotope ratios of bones and teeth as new dietary indicators: results from a modern food web (Koobi Fora, Kenya).Scientific reports · 2016Article
- Zinc Isotope Ratios as Indicators of Diet and Trophic Level in Arctic Marine Mammals.PloS one · 2016Article
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3 authors.
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Abstract
Geochemical inferences on ancient diet using bone and enamel apatite rely mainly on carbon isotope ratios (δ(13)C) and to a lesser extent on strontium/calcium (Sr/Ca) and barium/calcium (Ba/Ca) elemental ratios. Recent developments in nontraditional stable isotopes provide an unprecedented opportunity to use additional paleodietary proxies to disentangle complex diets such as omnivory. Of particular relevance for paleodietary reconstruction are metals present in large quantity in bone and enamel apatite, providing that biologically mediated fractionation processes are constrained. Calcium isotope ratios (δ(44)Ca) meet these criteria but exhibit complex ecological patterning. Stable magnesium isotope ratios (δ(26)Mg) also meet these criteria but a comprehensive understanding of its variability awaits new isotopic data. Here, 11 extant mammal species of known ecology from a single locality in equatorial Africa were sampled for tooth enamel and, together with vegetation and feces, analyzed for δ(26)Mg, δ(13)C, Sr/Ca, and Ba/Ca ratios. The results demonstrate that δ(26)Mg incorporated in tooth enamel becomes heavier from strict herbivores to omnivores/faunivores. Using data from experimentally raised sheep, we suggest that this (26)Mg enrichment up the trophic chain is due to a (26)Mg enrichment in muscle relative to bone. Notably, it is possible to distinguish omnivores from herbivores, using δ(26)Mg coupled to Ba/Ca ratios. The potential effects of metabolic and dietary changes on the enamel δ(26)Mg composition remain to be explored but, in the future, multiproxy approaches would permit a substantial refinement of dietary behaviors or enable accurate trophic reconstruction despite specimen-limited sampling, as is often the case for fossil assemblages.
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