Life histories and niche dynamics in late Quaternary proboscideans from Midwestern North America: evidence from stable isotope analyses

@article{Widga2020LifeHA,
  title={Life histories and niche dynamics in late Quaternary proboscideans from Midwestern North America: evidence from stable isotope analyses},
  author={Chris Widga and Gregory W L Hodgins and Kayla Kolis and Stacey Lengyel and Jeffrey John Saunders and J. Douglas Walker and Alan D. Wanamaker},
  journal={bioRxiv},
  year={2020}
}
Stable isotopes of mammoths and mastodons have the potential to illuminate ecological changes in late Pleistocene landscapes and megafaunal populations as these species approached extinction. The ecological factors at play in this extinction remain unresolved, but isotopes of bone collagen (δ13C, δ15N) and tooth enamel (δ13C, δ18O, 87Sr/86Sr) from the Midwest, USA are leveraged to examine ecological and behavioral changes that occurred during the last interglacial-glacial cycle. Both species… 

References

SHOWING 1-10 OF 140 REFERENCES

The isotopic ecology of late Pleistocene mammals in North America: Part 1. Florida

Stable isotopes reveal ecological differences amongst now‐extinct proboscideans from the Cincinnati region, USA

It is proposed that these individuals lived during a relatively warm period following the LGM, and the mammoth with the highest δ18O value also has the lowest δ13C value, suggesting that this individual was alive after regional vegetation shifted from open parkland to deciduous forest dominated by C3 species.

Late Pleistocene proboscidean population dynamics in the North American Midcontinent

Large-scale, collections-based, chronological and taphonomic analyses of midwestern Proboscidea suggest divergent population histories in mammoths and mastodons after the Last Glacial Maximum, suggesting this pattern is due to the collapse of trophic controls on proboscidean populations prior to the LGM and a subsequent system-wide shift from top-down to bottom-up regulatory mechanisms in Proboscidesa.

Reframing the mammoth steppe: Insights from analysis of isotopic niches

Isotopic paleoecology of Clovis mammoths from Arizona

Recon reconstructing the seasonal diet and climatic conditions experienced by mammoths in the San Pedro Valley of Arizona, using the carbon (13C/12C) and oxygen (18O/16O) isotope compositions of tooth enamel suggests that Clovis mammoths experienced a warm, dry climate with sufficient summer rainfall to support seasonal C4 plant growth.

Stable Isotope Ecology of a Late Miocene Population of Gomphotherium productus (Mammalia, Proboscidea) from Port of Entry Pit, Oklahoma, USA

Abstract The stable carbon and oxygen isotope compositions of serial samples of enamel from tusks of Gomphotherium productus (Mammalia, Proboscidea) from Port of Entry Pit, Oklahoma (early

Megafaunal isotopes reveal role of increased moisture on rangeland during late Pleistocene extinctions

Moisture-driven environmental changes appear to have played an important part in the late Quaternary megafaunal extinctions through alteration of environments such as rangelands, which supported a large biomass of specialist grazers.
...