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False-brome: A threat to forest and prairie ecosystems. Debbie Johnson Institute for Applied Ecology debbie@appliedeco.org. False-brome can: Replace native vegetation through competition for water, nutrients and light Displace associated species

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Presentation Transcript
slide1

False-brome:

A threat to forest and prairie ecosystems

Debbie Johnson

Institute for Applied Ecology

debbie@appliedeco.org

slide2

False-brome can:

  • Replace native vegetation through competition for water, nutrients and light
  • Displace associated species
  • Contribute directly to the decline of threatened and endangered species
  • Alter wildfire behavior
  • Diminish recreational values or alter access

Taylor’s checkerspot butterfly

Photo by Dana Ross

slide4

OSU

McDonald-Dunn Forest

closed canopy forest

meadow

slide8

False-brome Management Plan Components

  • Survey Design
  • Forest-wide on permanent transects (repeat of 1993 survey method)
  • Containment
  • Reduce the amount of seed leaving the forest
  • Reduce the amount of false-brome in seed when logging occurs
  • Reduce the amount of seeds spread by recreationists
  • Reduce the amount of seeds spread by staff
  • Control
  • Treat post-harvest for three years in clearcut units
  • Eliminate isolated populations
  • Eliminate populations in and around special ecological areas
  • Education
  • Expand on Oak Creek kiosk interpretation; add boot-washer
  • Interpret road and trailside treatment project
  • Hold periodic field trips
  • Monitoring
  • Measure plots in control treatment areas
  • Remeasure forest-wide survey every 10 years

See: Invasive Plant Management Plan for full text at

www.cof.orst.edu/cf/forests/mcdonald/plan

slide9

Restoration Principles

  • 1. Eliminate small populations using the most effective control technique known.
  • Focus control on the protection of special ecological areas and satellite populations initially, rather than the advancing front of the source population.
  • Educate staff, students, contractors, and recreationists .
slide10

Soap Creek

~ 80 acres

slide11

Difference in native species richness

Decline in

Brachypodium

(%)

-1

0

1

2

3

4

0

-20

-40

-60

-80

-100

-120

glyphosate/surflan (Oct)

glyphosate/surflan (Oct)

glyphosate (Aug)

glyphosate (Aug)

mow (Aug)/glyphosate (Oct)

mow (Aug)/glyphosate (Oct)

glyphosate (Sept)

glyphosate (Oct)

fusilade med/surflan (Oct)

fusilade med/surflan (Oct)

glyphosate/pend (Oct)

glyphosate/pend (Oct)

treatment

fusilade med/pendulum (Oct)

fusilade med/pendulum (Oct)

fusilade high (Oct)

fusilade high (Oct)

fusilade high (Aug)

fusilade high (Aug)

fusilade high/pendulum (Oct)

fusilade high/pendulum (Oct)

fusilade high/pendulum (Aug)

fusilade high/pendulum (Aug)

fusilade low/pendulum (Oct)

fusilade low/pendulum (Oct)

fusilade med/pendulum (Aug)

fusilade med/pendulum (Aug)

control

control

slide15

Enemy release hypothesis is supported for pathogens, but not for insects as herbivory is higher in the invaded range

    • Seed pathogens control B. sylvaticum population growth rates in native range
    • Rapid evolution has occurred in resistance and water use efficiency
    • B. sylvaticum is a poor competitor in the sun, but in the shade it outcompetes E. glaucus, S. arundinaceus, D. californica.
  • Results from the lab of B. Roy, UO
slide16

Resources

False-brome Working Group Website

www.appliedeco.org/invasive-species-resources/FBWG

Middle Fork Willamette Watershed Council

Invasive Plant Species Working Group

http://www.mfwwc.org/nativeplants.html

training lambs to be weed eaters

Training Lambs to be Weed-eaters

Experiments on the efficiency of Ovis airies for use in the biological control of Brachypodium sylvaticum- a non-native bunchgrass

Ryan Scholz-

Junior; Animal Sciences/ Bioresource Research

Dr. Howard Meyers-

Professor; OSU Dept. Animal Sciences

Dr. Deborah Clark-

Sr. Instructor; OSU Biology Program