Wildlife and Terrestrial Ecosystems
Contact Information
  • Wildlife and Terrestrial Ecosystems
  • Southwest Forest Science Complex
  • 2500 South Pine Knoll
  • Flagstaff, AZ 86001-6381
  • (928) 556-2001
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Yvette K. Ortega

800 Block East Beckwith
Missoula, MT 59801
Phone: 406-542-3246

Current Research

* Examine interactive impacts of herbivory by biological control agents and drought on the competitive dominance of a notorious weed.* Asses a new technique for assessing habitat quality for songbirds based on local song structure. * Measure effects of herbicide treatments aimed at weed control on plants and animals and evaluate degree to which such methods mitigate target invader impacts.

Research Interests

My primary interest lies in building understandings of ecological patterns and processes in order to improve the management of natural systems. Current applications include evaluating impacts of exotic weed invasion on native plants, cascading effects on consumers, and efficacy of weed control tools in mitigating these impacts. Studies consider population and community level attributes and organisms from plants and invertebrate to birds and their predators.

Past Research

My research applies ecological principles and insights to real-world problems such as exotic plant invasion and climate change.

Why This Research is Important

* Cascading effects on weed invasion on native plants, insects, and birds.* Changes in small mammal populations associated with biocontrol food subsidies.* Impacts of forest fragmentation on songbirds.* Human disturbance effects on harbor seals.


  • University of California, Berkeley, BA Environmental Science, 1992
  • University of Vermont, MS Wildlife and Fisheries Biology, 1998

Featured Publications & Products

Publications & Products

Research Highlights


An herbicide solution to knapweed

Station researchers evaluated the effects of a common herbicide treatment on grassland plants in western Montana to determine if and when suppre ...


Last updated on : 10/13/2014