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College of Forestry and Conservation

Yellowstone National Park

Contact Information:

David Hallac, Chief of Resources

Tobin W. Roop, Chief, Branch of Cultural Resources


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:



Alpine Vegetation


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