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

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,...

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Published in:PloS one 2016-11, Vol.11 (11), p.e0166678-e0166678
Main Authors: de Winter, Niels J, Snoeck, Christophe, Claeys, Philippe
Format: Article
Language:English
Subjects:
Aging - physiology
Animals
Annual variations
Archaeology
Archives & records
Biology and Life Sciences
Bivalvia
Carbon
Carbon isotopes
Carbonates
Cheek
Comparative analysis
Dental enamel
Dental Enamel - metabolism
Diet
Earth Sciences
Eating - physiology
Enamel
Environmental Exposure
Equus caballus
Fluorescence
Geochemistry
Horses - metabolism
Hydrologic cycle
Hydrology
Isotope ratios
Isotopes
Laboratories
Mammals
Medicine and Health Sciences
Models, Biological
Ovis aries
Oxygen
Oxygen isotopes
Oxygen Isotopes - metabolism
Physical Sciences
Seasonal variations
Seasons
Sheep
Stable isotopes
Studies
Teeth
Trace elements
Trace Elements - metabolism
X ray fluorescence
X-ray spectroscopy
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Snoeck, Christophe
Claeys, Philippe
description 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.
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subjects Aging - physiology
Animals
Annual variations
Archaeology
Archives & records
Biology and Life Sciences
Bivalvia
Carbon
Carbon isotopes
Carbonates
Cheek
Comparative analysis
Dental enamel
Dental Enamel - metabolism
Diet
Earth Sciences
Eating - physiology
Enamel
Environmental Exposure
Equus caballus
Fluorescence
Geochemistry
Horses - metabolism
Hydrologic cycle
Hydrology
Isotope ratios
Isotopes
Laboratories
Mammals
Medicine and Health Sciences
Models, Biological
Ovis aries
Oxygen
Oxygen isotopes
Oxygen Isotopes - metabolism
Physical Sciences
Seasonal variations
Seasons
Sheep
Stable isotopes
Studies
Teeth
Trace elements
Trace Elements - metabolism
X ray fluorescence
X-ray spectroscopy
title Seasonal Cyclicity in Trace Elements and Stable Isotopes of Modern Horse Enamel
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