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Evidencia isotópica de la variabilidad de la dieta en el homínido temprano Paranthropus robustus robustus
Matt Sponheimer1, Benjamin H Passey, Darryl J de Ruiter
1Department of Anthropology, University of Colorado at Boulder, Boulder, CO 80309, USA.
Science (New York, N.Y.)
|November 11, 2006
Resumen
La dieta de Paranthropus robustus variaba estacionalmente y anualmente, lo que indica que no eran especialistas en dietas. Los alimentos basados en la sabana eran una parte significativa y fluctuante de su dieta hace unos 1,8 millones de años.
Área de la Ciencia:
- La paleoantropología es la paleoantropología.
- Geoquímica de isótopos La geoquímica de isótopos es la química de los isótopos.
Sus antecedentes:
- Los métodos tradicionales de reconstrucción de la dieta carecen de resolución temporal a nivel individual.
- Comprender la flexibilidad dietética de los homínidos es crucial para los estudios evolutivos.
Objetivo del estudio:
- Para investigar la variabilidad de la dieta dentro de la vida útil de los individuos de Paranthropus robustus.
- Determinar el papel de los recursos basados en la sabana en la dieta de Paranthropus robustus.
Principales métodos:
- Análisis de isótopos estables (delta13C) mediante la ablación láser.
- Análisis de tejidos dentales fósiles para rastrear los cambios en la dieta a lo largo del tiempo.
Principales resultados:
- Los valores de delta13C en Paranthropus robustus mostraron importantes fluctuaciones estacionales e interanuales.
- La evidencia sugiere una dieta que incorpora cantidades variables de recursos derivados de la sabana.
Conclusiones:
- El Paranthropus robustus exhibió flexibilidad dietética, no especialización.
- Los ecosistemas de la sabana proporcionaron una fuente de alimento crucial pero variable para Paranthropus robustus hace 1,8 millones de años.
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