Using Microstructures and Composition to Decipher the Alterations of Rodent Teeth in Modern Regurgitation Pellets-A Good News-Bad News Story - Sorbonne Université
Article Dans Une Revue Minerals Année : 2020

Using Microstructures and Composition to Decipher the Alterations of Rodent Teeth in Modern Regurgitation Pellets-A Good News-Bad News Story

Résumé

Rodent accumulations are widely used for palaeoenvironmental reconstructions. But these accumulations are created through the activity of predators (carnivorous mammals, birds of prey), the predation and digestion of which modify the preservation of bones and teeth. The microstructures of dentine and enamel, as well as the mineralogy and composition of non-digested and digested Rodent teeth extracted from modern regurgitation pellets collected at Olduvai (Tanzania) from a bird of prey (Bubo sp.) are compared. Scanning electron microscopy (SEM), Electron Probe Micro Analysis (EPMA) and Raman spectrometry were used. The modifications induced by the digestion process are variable and depend on the tissue (enamel, dentine), tooth (incisor, molar) and the predator. For a given tissue of a tooth, the estimation of the intensity of the alteration varies according to the selected criteria. To classify the digested teeth in categories based on a single parameter to reconstruct environment is still subjective, even for modern accumulations. Moreover, to identify the interplay of diverse parameters to avoid biases in reconstructions is difficult.
Fichier principal
Vignette du fichier
minerals-10-00063-v3.pdf (8.69 Mo) Télécharger le fichier
Origine Publication financée par une institution
Loading...

Dates et versions

hal-02553716 , version 1 (24-04-2020)

Identifiants

Citer

Yannicke Dauphin. Using Microstructures and Composition to Decipher the Alterations of Rodent Teeth in Modern Regurgitation Pellets-A Good News-Bad News Story. Minerals, 2020, 10 (1), pp.63. ⟨10.3390/min10010063⟩. ⟨hal-02553716⟩
24 Consultations
53 Téléchargements

Altmetric

Partager

More