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Boise and Sawtooth Invasive Plant Species Project

Boise and Sawtooth National Forests

– Project Description

The purpose of this project was to reduce the negative effects of existing and future invasive plants on the structure and function of native plant communities and other natural resource values. Vast areas on both Forests were threatened by the introduction and establishment of  weed species, particularly in areas as high risk because of recent wildfire.

Photo of spotted knapweed

Project Summary

 The project area included all National Forest System lands within the 2,267,000 acres of the Boise National Forest and 2,170,000 acres of the Sawtooth National Forest.

The proposed action prioritized weed species and treatment areas on both Forests; identified and treated existing priority weed infestations using a variety of methods; improved sagebrush obligate habitat by managing invasive weed species through preventions, removal, or containment; limited the spread and effect of nonnative invasive species in sage-steppe ecosystems; and prevented or limited the introduction and establishment of identified weed species, particularly in areas as high risk because of recent wildfire.



Attending and documenting Interdisciplinary Team Meetings


Editing technical reports


Authoring the recreation and visuals technical reports


Authoring the 497-page environmental impact statement and developing and editing the accompanying 11 appendices


Maintaining and indexing the project record


Analyzing comments received during the public comment period, identifying issues, and assisting the team with developing additional alternatives in response to public comment

Climate Change and Invasive Species

Climate change is having an important influence on invasive species. The increase in temperatures, rainfall, humidity, and drought can facilitate their spread and establishment, creating new opportunities for them to become invasive. 

To manage invasive species under a changing and unpredictible climate, invasive species must be contained. Land managers will also need to anticipate which species will spread to new habitats and understand how the characteristics of specific invaders may disrupt invaded ecosystems.