Meeting the Challenge: Invasive Plants in PNW Ecosystems

University of Washington Center for Urban Horticulture, Seattle
September 19th & 20th, 2006

A large portion of the information from this conference has been made available for Internet access. The presentations given in the main room of the conference (NHS Hall) were recorded, and can be watched with the accompanying slides (follow the instructions below). The presentations given in the Douglas Classroom were not recorded, but the slides are available for viewing as PDFs.

Conference Sponsors

Click to go to the University of Washington Botanic Gardens Webpage             Click to go to The Nature Conservancy Webpage

Click to go to the USDA Forest Service PNW Research Station Webpage

Important Viewing Information

These instructions will help guide you through the streaming video viewing interface.
This link provides the minimum system requirements to view the streaming video presentations, and has free downloads for system upgrades.
ActiveX Warning Instructions to follow if ActiveX Security Warnings pop up when trying to view streaming video on this site.


Streaming Video Presentations from September 19th

Control Techniques, Biology and Impacts (Aquatic / Wetland)

Invasive Plants in the Pacific Northwest: Where to From Here
Plenary speaker: Dr. John Randall, The Nature Conservancy (PDF version: 5 MB)

Experimental Comparison of Treatment Methods for Sparsely Distributed Spartina anglica Infestations
N. Kathryn Morgan – The Nature Conservancy (PDF version: 0.6 MB)
Willapa Bay Spartina Control Program: Current Status and Lessons Learned
Wendy L. Brown Washington State Dept. of Natural Resources (PDF version: 1.5 MB)
Fungal Symbiosis: A Potential Mechanism of Plant Invasiveness
Regina Redman, US Geological Survey (PDF version: 0.9 MB)
Eradication of Milfoil from Walsh Lake in Seattle’s Cedar River Municipal Watershed
Josh Wozniak, Herrera Environmental Consultants (PDF version: 0.5 MB)
The IPANE Program: New England’s multifaceted Early Detection Program
Plenary speaker: Dr. Les Mehrhoff, University of Connecticut (PDF version: 7.8 MB)
Control Techniques, Biology and Impacts (Riparian)
Developing a Biological Control Program for Invasive Knotweeds (Fallopia spp.)
Fritzi Grevstad, University of Washington Olympic Natural Resources Center (PDF version: 1 MB)
Landscape-Scale Knotweed Control in the Upper Skagit River Basin
Melisa Holman, The Nature Conservancy (PDF version: 0.7 MB)
Persistence of Polygonum cuspidatum: Lessons Learned From 6 years of Field Trials
Jason Dumont, The Nature Conservancy (PDF version: 1 MB)
Phalaris arundinacea L. Control and Riparian Restoration within Agricultural Watercourses in King County, WA
Lizbeth Seebacher, University of Washington Botanic Gardens (PDF version: 2 MB)
Partnerships / Education / Outreach
Weeds Cross Borders Project: A Canada-US Collaboration
Lisa Scott, South Okanagan-Similkameen Invasive Plant Society (PDF version: 2.5 MB)
If You Can’t Beat Them, Teach Them: Utilizing Education for Invasive Monitoring and Removal
Erin Schneider, Stewardship Coordinator, North Cascades Institute (PDF version: 1.2 MB)
The St. Louis Codes of Conduct: Providing a Framework to Prevent Invasions from Horticulture
Sarah Reichard, University of Washington Botanic Gardens (PDF version: 0.6 MB)

Streaming Video Presentations from September 20th

Control Techniques, Biology and Impacts (Terrestrial and Prairie)

Invasive Plants in Natural Resource Management: The Federal Perspective
Plenary speaker:
Dr. Ann Bartuska, Deputy Chief, FS R&D, USDA Forest Service (PDF version: 5.2 MB)
The Integrated Control Program for Cytisus scoparius at Mima Mounds Natural Area Preserve
Caroline Marschner, The Nature Conservancy (PDF version: 1.7 MB)
Cytisus scoparius (Scotch Broom): Can it be Controlled Using Sewage Biosolids?
Jacqueline Shaben, University of British Columbia (PDF version: 1.4 MB)
Factors Influencing Regeneration of Scotch Broom (Cytisus scoparius)
Timothy Harrington, US Dept. Of Agriculture Forest Service, Forest Sciences Laboratory (PDF version: 0.8 MB)
Control of Potentilla recta in an Undisturbed South Puget Sound Prairie
Cliff Chapman, The Nature Conservancy (PDF version: 1.7 MB)
Biology and Management of Invasive Hawkweeds (Hieracium spp.) in the Pacific Northwest
Linda Wilson, University of Idaho (PDF version: 2.9 MB)
Managing Rangeland Invasive Plants with Aminopyralid (Milestone™ Herbicide)
Vanelle Carrithers, Dow AgroSciences (PDF version: 1.9 MB)
Endophytes of Centaurea stoebe L. ssp. micranthos (Gugler) Hayek
George Newcombe, University of Idaho (PDF version: 0.9 MB)
Impacts of Exotic and Indigenous Invasive Plant Species on Forest Ecosystems
Simon Shamoun, Canadian Forest Service (PDF version: 10 MB)
The Temporal Effects of Ulex europaeus on Soil Properties, Modeling Impact of Invasive Species with Respect to Time, and Possible Consequences of Soil Property Changes
Bronwyn Scott, University of Washington Botanic Gardens (PDF version: 1.1 MB)
The Value of Statewide Invasive Plant Councils: the View From California and Beyond
Plenary speaker: Doug Johnson, Executive Director,California Invasive Plant Council (PDF version: 0.5 MB)


PDF Presentations from September 19th (No Video)

Early Detection and Rapid Response

Early Detection Protocol Development in the National Parks: Integrating all the Pieces
Susan O’Neil, National Park Service

1.7 MB
Developing Early Detection Networks to Abate the Invasive Species Threat
Kyle Strauss, The Nature Conservancy
1.6 MB
The First Line of Defense: Interceptions of Federal Noxious Weed Seeds in Washington
Margaret Smither-Kopperl, US Dept. of Agriculture Animal and Plant Health Inspection Service
0.4 MB
A NEPA Strategy for Early Detection / Rapid Response
Rochelle Desser, US Dept. of Agriculture Forest Service, TEAMS Enterprise (PDF version)
0.4 MB
Management Approaches
Building consensus: Working Together to Manage Invasive Plants in Southwestern British Columbia
Dawn Hanna, Greater Vancouver Invasive Plant Council
0.6 MB
Strategic Management of Public Invasive Species Programs
Steven Burke, King County Noxious Weed Control Program
0.3 MB
Invasive Plant Management Following the 2003 Okanagan Valley Wildfires, British Columbia
Lisa Scott, South Okanagan-Similkameen Invasive Plant Society
3.9 MB
The Incorporation of Noxious Weed Practices into BPA’s Schultz-Wautoma Powerline Construction Project
Bill Erickson, Bonneville Power Administration
1.9 MB
Partnerships / Education / Outreach
Use of Risk Assessment Information to Determine Treatment Buffer Widths
Diana Perez, US Dept of Agriculture, Forest Service (PDF version)
0.3 MB
A Summary of Herbicide Effects to Wildlife
Shawna Bautista, US Dept of Agriculture, Forest Service (PDF version)
0.3 MB
Developing Bid Specifications for Invasive Plant Management Programs
Steven Manning, Invasive Plant Council (PDF version)
7.6 MB

PDF Presentations from September 20th (No Video)

Distribution and Mapping of Invasive Plants

Invasive Plants in the Middle Fork Snoqualmie River Watershed, King County, WA
Mark Boyar, Mountains to Sound Greenway
0.7 MB
Non-Native Plants on the Mount Baker-Snoqualmie National Forest
Tracy Fuentes, US Dept. of Agriculture Forest Service
0.4 MB
The Spread of Invasive Exotic Plants in Alaska
Michael Shephard, US Dept. of Agriculture Forest Service
0.7 MB
Challenges in Predicting the Potential Distribution of Exotics using Habitat Distribution Models
Chad Jones, University of Washington
1 MB
Mapping the Tides for Managing Invasive Spartina alterniflora Control in Willapa Bay
Keven Bennett and Teresa Zena Alcock, Olympic Natural Resources Center
2.4 MB
Rare Plants and Vile Weeds: Urbanizing Flora of Portland, OR 1806-2006
Angela Kimpo, Metro Regional Parks and Greenspaces
1.5 MB
Washington State Integrated Noxious Weed Invasive Species Project (INWISP)
Dan Fagerlie and Jennifer Andreas, Washington State University
6.2 MB
Distribution and Abundance of Invasive Plants in Pacific Northwest Forests
Andrew Gray, US Dept. of Agriculture Forest Service
1.8 MB
Patterns of Native and Exotic Richness and Abundance in Western Grasslands at Multiple Scales Across a 2,000 km Latitudinal Gradient
Amanda Stanley, Institute for Applied Ecology
0.9 MB
Herbarium Collections and Invasive Species Biology: Understanding the Past, Present and Future
David Giblin, University of Washington Herbarium
1.3 MB