Analyze Diet
PloS one2016; 11(11); e0166678; doi: 10.1371/journal.pone.0166678

Seasonal Cyclicity in Trace Elements and Stable Isotopes of Modern Horse Enamel.

Abstract: The study of stable isotopes in fossil bioapatite has yielded useful results and has shown that bioapatites are able to faithfully record paleo-environmental and paleo-climatic parameters from archeological to geological timescales. In an effort to establish new proxies for the study of bioapatites, intra-tooth records of enamel carbonate stable isotope ratios from a modern horse are compared with trace element profiles measured using laboratory micro X-Ray Fluorescence scanning. Using known patterns of tooth eruption and the relationship between stable oxygen isotopes and local temperature seasonality, an age model is constructed that links records from six cheek upper right teeth from the second premolar to the third molar. When plotted on this age model, the trace element ratios from horse tooth enamel show a seasonal pattern with a small shift in phase compared to stable oxygen isotope ratios. While stable oxygen and carbon isotopes in tooth enamel are forced respectively by the state of the hydrological cycle and the animal's diet, we argue that the seasonal signal in trace elements reflects seasonal changes in dust intake and diet of the animal. The latter explanation is in agreement with seasonal changes observed in carbon isotopes of the same teeth. This external forcing of trace element composition in mammal tooth enamel implies that trace element ratios may be used as proxies for seasonal changes in paleo-environment and paleo-diet.
Publication Date: 2016-11-22 PubMed ID: 27875538PubMed Central: PMC5119779DOI: 10.1371/journal.pone.0166678Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research paper examines how trace elements and stable isotope ratios in horse tooth enamel can provide insight into an animal’s past diet and environmental conditions. It establishes a new method for studying bioapatites, traditionally used to record ancient environmental and climatic parameters.

Overview of Research Approach

  • The researchers analyzed the intra-tooth records of enamel carbonate stable isotope ratios in a modern horse. This data was compared with trace element profiles obtained using laboratory micro X-Ray Fluorescence scanning.
  • Using identifiable patterns of tooth eruption and the correlation between stable oxygen isotopes and local temperature seasonality, the researchers constructed an age model. Records from six cheek upper right teeth were linked in this model for further comparisons.
  • When plotted on the age model, the trace element ratios exhibited a seasonal pattern. Notably, this pattern experienced a minor phase shift when compared to stable oxygen isotope ratios.

Interpretation of Findings

  • Stable oxygen and carbon isotopes in tooth enamel were interpreted as indicators of the state of the hydrological cycle and the animal’s diet respectively.
  • The researchers inferred that the seasonal signal in trace elements delineated seasonal changes in the animal’s diet and intake of dust.
  • This deduction aligned with observed seasonal patterns in carbon isotopes of the same teeth.

Potential Implications of Research

  • The research suggested that external factors impact the trace element composition in mammal tooth enamel.
  • Thus, the study indicates that trace element ratios might be utilized as proxies to determine seasonal changes in an animal’s former environment and diet.
  • This opens up new possibilities for the study of bioapatites and the understanding of ancient environmental and climatic parameters from archaeological and geological timescales.

Cite This Article

APA
de Winter NJ, Snoeck C, Claeys P. (2016). Seasonal Cyclicity in Trace Elements and Stable Isotopes of Modern Horse Enamel. PLoS One, 11(11), e0166678. https://doi.org/10.1371/journal.pone.0166678

Publication

ISSN: 1932-6203
NlmUniqueID: 101285081
Country: United States
Language: English
Volume: 11
Issue: 11
Pages: e0166678
PII: e0166678

Researcher Affiliations

de Winter, Niels J
  • Department of Analytical-, Environmental-, and Geochemistry, Vrije Universiteit Brussel, Pleinlaan 2, B-1050, Brussels, Belgium.
Snoeck, Christophe
  • Department of Analytical-, Environmental-, and Geochemistry, Vrije Universiteit Brussel, Pleinlaan 2, B-1050, Brussels, Belgium.
Claeys, Philippe
  • Department of Analytical-, Environmental-, and Geochemistry, Vrije Universiteit Brussel, Pleinlaan 2, B-1050, Brussels, Belgium.

MeSH Terms

  • Aging / physiology
  • Animals
  • Dental Enamel / metabolism
  • Eating / physiology
  • Environmental Exposure
  • Horses / metabolism
  • Models, Biological
  • Oxygen Isotopes / metabolism
  • Seasons
  • Trace Elements / metabolism

Conflict of Interest Statement

The authors have declared that no competing interests exist.

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