Feeding Ecology of Ancient Horses in South America
Author Information
Author(s): José L. Prado, Begoña Sánchez, María T. Alberdi
Primary Institution: INCUAPA, Universidad Nacional del Centro
Hypothesis
Can stable isotope analysis of fossil horses reveal their dietary preferences and ecological adaptations during the Plio-Pleistocene?
Conclusion
The study shows that ancient horses had diverse dietary preferences, with some species primarily consuming C3 plants while others had mixed or C4 diets.
Supporting Evidence
- Stable isotope data show changes in C4 grass consumption and dietary partitioning among horse species.
- Equus (Amerhippus) shows three distinct dietary patterns based on isotopic analysis.
- Hippidion primarily consumed C3 plants, with some individuals showing mixed diets.
Takeaway
Scientists studied old horse fossils to see what they ate, finding that some liked grass while others preferred bushes and trees.
Methodology
Stable carbon and oxygen isotopes were analyzed from 67 fossil tooth and bone samples of seven horse species across 25 localities.
Potential Biases
Potential taphonomic alterations in fossil samples could affect isotopic results.
Limitations
Most samples were collected from old museum collections without sufficient stratigraphic control.
Participant Demographics
Fossil samples from various species of horses, including Hippidion and Equus (Amerhippus), from different geographical regions in South America.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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