Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
Home | Intranet | Digital Measures | Help

Jackson Moose Project

Wyoming Moose

Duration

July 2007 - December 2011

Narrative

We are working to understand the influnece of seasonal limitations and limiting factors on ungulate populations. Landscapes are being altered at increasing rates from both anthropogenic and natural causes. Growing human populations and increasing frequency of natural disturbances like wildfires produce fine to large-scale changes on the landscape. Such disturbances can alter habitat use and result in population-level consequences and thus challenges our ability to conserve and manage wildlife populations. In collaboration with the Wyoming Game and Fish Department, Grand Teton National Park, and the US Forest Service, we are exploring the influence of large scale disturbance (i.e., wildfire) on a moose population in northwest Wyoming. Shiras moose (Alces alces shirasi) that inhabit areas within Grand Teton National Park and Bridger-Teton National Forest, have been experiencing a population decline for the last 16-22 years. Recent research has shown that these animals are highly migratory and that most moose wintering in the Buffalo Valley migrate north and summer in southern portions of Yellowstone National Park. By evaluating the condition and demography of captured moose, previous research that we conducted suggested that poor habitat quality is most likely limiting this population. Habitat quality has not been directly measured, however, and it is not known if summer or winter habitat is most limiting. Additionally, much of the summer range in the study area burned during the Yellowstone fires of 1988. Fire typically creates habitats favorable for moose, and is often followed by an increase in moose reproduction and density. However, moose in this study population have continued to decline despite an abundance of fires in the last 20 years. Thus, the influence of fire on Jackson moose population performance remains unclear. The growth of wolf and grizzly bear populations further complicates our understanding of moose population ecology in the region. We are evaluating moose habitat by characterizing browse condition, diet, and the nutritional quality of forage on both winter and summer ranges. The overall objective of this study is to assess the condition and nutritional quality of forage at both times of the year and to connect these measures of seasonal habitat quality with the demographic performance of individual moose. We hope to provide a more mechanistic understanding of the effects of disturbance and seasonal habitat quality on moose demography and population growth and to clarify the role of habitat change in recent population declines.

Research Products and Activities

Thesis

  • Vartanian, Janess M., Habitat Condition and the Nutritional Quality of Seasonal Forage and Diets: Demographic Implication for a Declining Moose Population in Northwest Wyoming, USA, M.S., Department of Zoology and Physiology, December, 2011.Download  | 
 

Current Staff

Federal Staff: 102

Masters Students: 247

Phd Students: 163

Post Docs: 55

University Staff: 266

5 Year Summary

Students graduated: 722

Scientific Publications: 1960

Presentations: 4355

 

Personnel

Funding Agencies

  • Teton Conservation District
  • USDA Forest Service
  • Wildlife Heritage Foundation of Wyoming
  • Wyoming Animal Damage Management Board
  • Wyoming Game and Fish Department

Links

Cooperative Research Units Program Headquarters Cooperators