Yellowstone National Park

Contact Information:

David Hallac, Chief of Resources

Tobin W. Roop, Chief, Branch of Cultural Resources

Yellowstone National Park Website

Research Needs


  • Inventory Bryophytes (mosses, liverworts, and hornworts
  • Document Rare vascular plants (species of special concern)
  • Prepare and Publish Annotated Vascular Plant Checklist
  • Describe/Characterize Baseline vegetation:
    • Geothermal
    • Willows
    • Alpine Vegetation
    • Fens
    • Xeric Sagebrush Steppe
    • Whitebark/Limber Pine
  • Complete Exotic Plant Inventory
  • Inventory Exotic Plants Along Power Lines
  • Inventory Fungi
  • Inventory Aquatic Vascular Plants
  • Inventory Herbariums for Yellowstone Specimens


  • Monitor Yellowstone sand verbena (Abronia ammophila)
  • Monitor Advance Of Community-Changing Species
  • Monitor Whitebark/Limber Pine
  • Monitor Post-Exotic Plant Control/Effect On Natural Communities
  • Monitor revegetation success
  • Document and Evaluate Effects of Road Reconstruction on Changes in Hydrology and Therefore Wetlands
  • Resample Fire Monitoring Plots
  • Evaluate/Correlate Historic Non-Forest Vegetation Trend And Condition Data Using Current Sampling Methods


  • Physical/Vegetation Relationships
  • Restoration of the Xeric Sagebrush Steppe vegetation of “Triangle” and Boundary lands area
  • Fire Ecology
  • Sources of Weeds
  • Plant genetics
  • Vegetation/Wildlife Interactions—Implement Recommendations from the National Science foundation: (Portions of these are currently funded)
    • Assess ecosystem stability, resistance, and resilience.
    • Response of plant and animal populations/communities to changes in herbivore density
    • Concurrent studies of riparian and aspen recruitment, weather/snowpack, etc.
    • Have ungulates achieved a dynamic equilibrium with range conditions?
    • Long-term investigations/experiments to evaluate management options.
    • GYE-wide assessment of the conditions and factors that influence aspen stand structure.
    • The relationship of herbivory and groundwater availability on riparian system performance.
    • Ungulate herbivory of willows in relation to animal body condition and plant secondary compound production.
  • Evaluate Whitebark Pine.Lodgepole Pine Interaction
  • Continue/Expand Study of Aspen Biogeochemistry
  • Continue/Expand Study of Secondary Metabolites


  • Expand Ongoing projects:
    • Inventory Resources for Compliance
    • Exotic Plant Control
    • Hazard Trees
  • Reassemble Historic Vegetation Data And Document History Of Vegetation Studies/Management
  • Document Vegetation impacts from social trails
  • Restore Disturbed Lands
  • Prepare Improved Vegetation Map
  • Fire Management
  • Document the Outwardly Creeping Edge of Developed Areas
  • Compile History of Vegetation Manipulation in the Park