Technical Report

 

Final report [year one]: Control of Brachypodium sylvaticum and restoration of rare native upland prairie habitat at Butterfly Meadows, Benton County ODA 1342 GR Public Deposited

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https://ir.library.oregonstate.edu/concern/technical_reports/mp48sk09g

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Abstract
  • Our project goal is to protect and restore rare Willamette Valley upland prairie habitat at Butterfly Meadows (Benton County) from invasion by the noxious weed Brachypodium sylvaticum (false brome). Native prairies, which once dominated the landscape of the Willamette Valley, are considered among the rarest of Oregon’s ecosystems and are in critical need of conservation. One of the largest remaining parcels of native upland prairie, Butterfly Meadows (Benton County), is being invaded by Brachypodium sylvaticum. This site is one of the three most important remaining habitats for the Fender’s blue butterfly and Kincaid’s lupine, listed as Endangered and Threatened respectively. We propose to develop and implement herbicide treatments that control Brachypodium sylvaticum without harming native prairie vegetation. We will also develop and implement measures to reestablish native species from seed after removal of Brachypodium sylvaticum. Conifers and mature shrubs that have encroached on the meadow, both on the edge and in the complex, will be removed by mechanical means or girdling. We propose to construct a buffer zone between the boundary of Butterfly Meadows and the neighboring intact forest and recently clear-cut areas, which are continuing sources of seed of Brachypodium sylvaticum invading Butterfly Meadows. This buffer zone will extend into both Starker Forest owned portions and OSU owned portions. To determine the success of control of Brachypodium sylvaticum and woody species and restoration of native vegetation, we will monitor changes in abundance of Brachypodium sylvaticum, woody species, and native vegetation. We will use monitoring results to adjust future Brachypodium sylvaticum control measures and native vegetation restoration measures as needed.
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  • 25 pages
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  • Prepared for Oregon State Weed Board; Oregon Department of Agriculture Salem, OR
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