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Project ID: 05-2-1-05

Year: 2005

Date Started: 08/04/2005

Date Completed: 11/18/2011

Title: Management Options to Control Exotic Invasive Plant Species in Association with Fuel Reduction Treatments in Wildland Urban Interface

Project Proposal Abstract: Large-scale efforts under the Healthy Forest Restoration Act of 2003 (HFRA) to reduce severe wildfire risk across the west by thinning and prescribed burning are expected to produce long-term benefits. However, restoration treatments may also introduce or spread exotic noxious weed species (hereinafter weeds) into forest ecosystems. The potential for weed problems is greater at the wildland urban interface (WUI), where diverse source propagules are abundant. It is a significant challenge for land managers to apply thinning and prescribed fire treatments in a manner that does not exacerbate existing weed and associated resource problems. Weed species have a significant impact on forest and rangeland health and productivity in eastern Washington. Our proposed study will compare herbicide, hot foam, and native seeding management options for controlling weed establishment and spread within the Liberty WUI Fuel Reduction Project currently being planned under HFRA authority. The Liberty WUI project is located along the eastern slopes of the Cascades on the Cle Elum Ranger District of the Okanogan and Wenatchee National Forests. Planned fuel reduction activities will be conducted in an area that has been already been invaded by noxious weeds such as diffuse and meadow knapweed (Centaurea diffusa, Centaurea pratensis). We will compare the efficacy and cost effectiveness of herbicide, hot foam, and native seeding experimental treatments to suppress and control weeds prior to and after fuel reduction activities and to enhance native plant diversity and community resilience. We will also examine the effect of fuel reduction activities and weed suppression treatments on plant community structure. Our proposal was inspired by the growing awareness among land managers and the public that weeds can be introduced and/or exacerbated by thinning and prescribed fire and the significant challenges managers face mitigating these unintended consequences.

Principal Investigator: Becky K. Kerns

Agency/Organization: Forest Service

Branch or Dept: PNW-Forestry Sciences Lab-Corvallis

Other Project Collaborators




Branch or Dept

Co-Principal Investigator

Viva Worthington

Forest Service

Okanogan & Wenatchee NFs-Cle Elum Ranger District

Federal Cooperator

Becky K. Kerns

Forest Service

PNW-Forestry Sciences Lab-Corvallis

Project Locations

Fire Science Exchange Network









Wenatchee National Forest




Crooked River National Grassland

Project Deliverables

Final Report view or print

("Results presented in JFSP Final Reports may not have been peer-reviewed and should be interpreted as tentative until published in a peer-reviewed source.")

  ID Type Title
    223 MS Thesis Aboveground Vegetation and Viable Seed Bank of a Dry Mixed Conifer Forest at the Wildland-Urban Interface (G. Snider)
  go to website 4831 Conference/Symposia/Workshop Workshop held at the Cle Elum RD and Wenatchee NF SO
    6907 Conference/Symposia/Workshop Community Reassembly Potential Following Proposed Thinning in a Mixed Conifer Forest: Lessons from the Seedbank
    6999 Conference/Symposia/Workshop The effect of fuel reduction and seeding on vegetation in an invaded juniper woodland
view or print   7000 Conference/Symposia/Workshop The Crooked River National Grassland Westside Wildland Urban Interface Fuel Reduction Project: Effect of Juniper Cuttin and Seeding on Vegetation

Supporting Documents

There are no supporting documents available for this project.

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