Society of American Foresters

Northwest Regions

Assisted migration of trees and shrubs - pragmatic or questionable? A friendly conversation grounded in real experiences

This two-hour lecture features presentations and a discussion on assisted migration. 

Hour one will feature four 10-minute presentations on

  • Seed migration: seed sources are moved climatically or geographically within their current ranges. (Example: collecting seed from droughty or flood-prone sites for propagation and out-planting at different site, but within the same seed zone)
  • Range Expansion: seed sources or plant materials are moved to suitable areas just outside of ranges. (Example: planting California black oak north of Lane County, and still within Oregon’s Willamette Valley)
  • Assisted species migration: species are moved far outside current ranges to prevent extinction, or to serve as a surrogate for another species in decline due to climate change (Example: planting incense cedar from central Oregon)
  • Climate change genetics: implicit assumptions in moving seed to mitigate for climate effects

Speakers include Brenda Clifton, Skagit River System Cooperative, Dan Hintz, Mountains to Sound Greenway, Scott Kolpak, Forest Service SW Oregon Geneticist, Dr. Deborah Rogers, Center for Natural Lands Management*Speakers will address different aspects of working definitions adapted from Williams & Dumroese (2014)

Hour two brings together a diverse panel to discuss the ethics and potential skepticism of applying assisted migration methods in restoration. Featuring:

Marc Gauthier - Upper Columbia United Tribes

Dr. Deborah Rogers, Center for Natural Lands Management

Dave Shaw, Professor; Forest Health Specialist, Forestry and Natural Resources OSU

Dr. Clare Palmer - Professor of philosophy at Texas A&M University

To register, visit -

Event date: 
Thursday, July 1, 2021 - 12:30 to 14:30