1 / 12

Presented by Drew Ann White

Habitat Selection By Elk Before and After Wolf Reintroduction in Yellowstone National Park Mao, J. S., M. S. Boyce, D. W. Smith, F. J. Singer, D. J. Vales, J. M. Vore and E. H. Merrill. Presented by Drew Ann White. Introduction. History of Yellowstone National Park (YNP) Wolf Elk

mercer
Télécharger la présentation

Presented by Drew Ann White

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Habitat Selection By Elk Before and After Wolf Reintroduction in Yellowstone National ParkMao, J. S., M. S. Boyce, D. W. Smith, F. J. Singer, D. J. Vales, J. M. Vore and E. H. Merrill Presented by Drew Ann White

  2. Introduction • History of Yellowstone National Park (YNP) • Wolf • Elk • Vegetation • Purpose • Anti-predator behavior http://www.bitsofscience.org/wordpress-3.0.1/wordpress/wp-content/uploads//wolf-yellowstone-ecosystem.jpg

  3. Methods • Prior to reintroduction • January 1985 – April 1987 (N = 7) • January 1987 - April 1990 (N =21 cows) and (N = 39 calves) • Post reintroduction • June 2000 – November 2002 (N = 80) • 1,560 summer locations/ 1,590 winter locations http://hikinglady.com/wp-content/uploads/2010/02/Garmin-eTrex-GPS.jpg

  4. Methods Cont. • Temporal Variation • Habitat characteristics • Vegetation type • Habitat openness • Elevation • Slope • Wolf density index • Snow water equivalent (SWE) http://lifesfast.files.wordpress.com/2010/09/lamar-valley.jpg

  5. Analysis • Resource Selection Functions (RSFs) • Akaike’s Information Criterion (AICs) http://www.ianplant.com/blog/2010/12/20/bull-elk-yellowstone-national-park/

  6. Analysis Cont.

  7. Analysis Cont.

  8. Discussion • Habitat selection changed • Interactive effects • Summer changes in habitat selection • Utilization of burn • Higher elevations • Winter changes in habitat selection • Open habitat • Grasslands http://upload.wikimedia.org/wikipedia/commons/6/63/Elk.jpg

  9. Discussion Cont. • Interactions between selection of wolf density and other habitat features • Slope • SWE • Tradeoffs and seasonal strategies of habitat selection • Summer range • Winter range

  10. Conclusion • Wolves are causing spatial and temporal changes in elk movement • Important implications for • Ecological processes • Nutrient cycling • Herbivory • Ungulate health

  11. Questions? http://www.nathab.com/uploaded-files/carousels/TRIPS/Ultimate-Yellowstone/US-National-Parks-Ultimate-Yellowstone-11-wolves.jpg

More Related