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Related Experiment Videos

Stable isotopes in elephant hair document migration patterns and diet changes.

Thure E Cerling1, George Wittemyer, Henrik B Rasmussen

  • 1Department of Geology and Geophysics, 135 South 1460 East, University of Utah, Salt Lake City, UT 84112, USA. tcerling@earth.utah.edu

Proceedings of the National Academy of Sciences of the United States of America
|January 13, 2006
PubMed
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Stable isotopes in elephant hair reveal migration and diet shifts. Analysis showed migrant elephants utilized different environments and raided crops, differing from resident elephant behavior.

Area of Science:

  • Ecology
  • Zoology
  • Biogeochemistry

Background:

  • Understanding elephant (Loxodonta africana) migration and diet is crucial for conservation efforts.
  • Seasonal variations in resource availability influence wildlife behavior and habitat use.
  • Stable isotope analysis offers a powerful tool to reconstruct past ecological interactions.

Purpose of the Study:

  • To determine migration patterns and seasonal diet changes in elephants in northern Kenya using stable isotope analysis of hair.
  • To differentiate between browse and grass consumption (C3 vs. C4 pathways) and assess ranging behavior related to aridity.
  • To compare the feeding and ranging behavior of a migrant elephant with a resident population.

Main Methods:

  • Analysis of stable carbon and nitrogen isotopes in elephant hair.

Related Experiment Videos

  • Utilizing C3 and C4 photosynthetic pathways to identify diet components (browse vs. grasses).
  • Corroborating isotopic findings with global positioning system (GPS) radio tracking data.

    • Main Results:

    • Stable isotopes in elephant hair provided insights into diet and range shifts.
    • Isotopic data revealed differences in feeding and ranging behavior between migrant and resident elephants.
    • Migrant elephants showed evidence of excursions into mesic environments and crop raiding.

    Conclusions:

    • Stable isotope chronologies in elephant hair effectively reconstruct migration and diet.
    • Dietary variation, including crop raiding, significantly influences elephant behavior and resource use.
    • This approach provides valuable insights into diet-related wildlife behavior and ecological dynamics.