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A ‘contagious’ species

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Strategies for Landscape Control and Containment of False-brome Tom Kaye Institute for Applied Ecology Corvallis, Oregon. A ‘contagious’ species. Full geographic spread in North America is broadening Present in Oregon, California, Washington (?), New York, Virginia, Michigan ….

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Strategies for Landscape Control and Containment of False-bromeTom KayeInstitute for Applied EcologyCorvallis, Oregon
a contagious species
A ‘contagious’ species
  • Full geographic spread in North America is broadening
  • Present in Oregon, California, Washington (?), New York, Virginia, Michigan …

New York, Steven Daniel

California, Esa Crumb

Oregon

disperses easily
Disperses easily
  • Equipment
  • Clothing
  • Pets
  • Wildlife (deer)
  • Water?
invasiveness
Invasiveness
  • Enemy Release Hypothesis
    • Roy et al. 2011
  • Evidence of within-species hybridization, multiple introductions to western US
    • Rosenthal et al. 2008
landscape invasion typical process for false brome
Landscape invasion:typical process for false-brome
  • Starts in areas where people and wildlife travel:
    • Roadsides, Parking lots, Trailheads
  • Spreads rapidly along roadsides and forest edges
  • Also spreads quickly into closed-canopy forest
  • Spreads more slowly into prairies and pastures – but facilitated by isolated trees
false brome invasion
False brome invasion

forest

grassland

landscape control strategies
Landscape control strategies
  • Detect and control new and isolated patches
  • Contain large populations
    • Start with reducing seed production or eliminating plants in high traffic areas – Stop the spread!
      • Roads, trailheads, parking areas, hiking trails, game trails
  • After containment, move to eradication if feasible
false brome invasion1
False brome invasion

forest

grassland

false brome invasion2
False brome invasion

forest

grassland

landscape control strategies1
Landscape control strategies
  • Establish partnerships, especially with adjacent landowners
    • Neighbors
    • Agencies
  • Use existing networks, if possible, to coordinate
    • Example: Middle Fork Willamette Watershed Council with funding from OWEB, NFWF
      • Coordinated survey across multiple properties, outreach and education, control opportunities
landscape control strategies2
Landscape control strategies
  • Land management activities
    • Before:
      • Eradicate false brome to avoid spreading to other sites
      • Clean equipment before entering new areas
    • After:
      • Clean equipment before leaving
    • Adopt strict contract language that stipulates these actions, with consequences.
  • Public outreach
    • Stop invasions before the start
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