Location

Ames, Iowa

Start Date

29-4-2016 12:00 AM

Description

Stable-isotope analysis of Platygonus compressus remains from Peccary Cave, AR documents previously unknown dietary and seasonal information on flat-headed peccary. P. compressus diet knowledge currently derives from dental wear analyses with no isotopic data. New δ13C data obtained from 14C dated specimens reveals a C3 focused diet, despite dental adaptations allowing for omnivorous and mixed plant-life feeding. Combined with other indicators, δ13C enables improved recreation of peccary habitat adaptations in the late Pleistocene. Serial sampling of a P. compressus tusk for δ13C and δ18O further evidences a C3 diet and documents seasonal shifts in δ18O. Abrupt δ18O shifts between samples enables improved understanding of water sources. Merging δ13C from bone and δ13C and δ18O from tusk adds to understanding P. compressus extinction and the debate over cause; climate change or human predation.

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Apr 29th, 12:00 AM

δ13C and δ18O Isotopic Analysis of a Platygonus compressus Tusk

Ames, Iowa

Stable-isotope analysis of Platygonus compressus remains from Peccary Cave, AR documents previously unknown dietary and seasonal information on flat-headed peccary. P. compressus diet knowledge currently derives from dental wear analyses with no isotopic data. New δ13C data obtained from 14C dated specimens reveals a C3 focused diet, despite dental adaptations allowing for omnivorous and mixed plant-life feeding. Combined with other indicators, δ13C enables improved recreation of peccary habitat adaptations in the late Pleistocene. Serial sampling of a P. compressus tusk for δ13C and δ18O further evidences a C3 diet and documents seasonal shifts in δ18O. Abrupt δ18O shifts between samples enables improved understanding of water sources. Merging δ13C from bone and δ13C and δ18O from tusk adds to understanding P. compressus extinction and the debate over cause; climate change or human predation.