Reports and documents by IAE staff.  

Using common garden studies to inform seed transfer zones for Willamette Valley species

Stephanie A. Miller, Matthew L. Carlson, Rob Fiegener, Melanie Gisler, Thomas N. Kaye, Kimiora Ward, Lisa Weiss and Amy Young   2008

The question of what seed is genetically and ecologically appropriate for restoration projects in the Willamette Valley has been hotly debated for the last two decades. The lack of data regarding variability of native Willamette Valley species has hampered seed production and restoration efforts and has caused costly delays – both biological and financial. To […]

Restoration of McGowan Meadow ACEC

Matt Blakeley-Smith   2011

Regional strategies for restoring invaded prairies

Amanda G. Stanley, Thomas N. Kaye and Peter W. Dunwiddie   2010

Background and approach: Invasive plants, especially non-native perennial grasses, are a critical threat to remnant prairies and oak savannas in the Pacific Northwest. We evaluated the effectiveness of restoration treatments designed to 1) reduce target exotic weeds with minimal non-target impacts and 2) increase native species diversity and abundance. In cooperation with numerous partners, the […]

Western meadowlarks and wet prairie habitat in the Willamette Valley: population enhancement through private land habitat restoration

Bob Altman, Matt Blakeley-Smith, Kate Halstead and Ann Kreager   2011

The objective of this project was to determine the occurrence, area requirements, nesting success, and associated habitat characteristics of Western Meadowlarks on private land wet prairie restoration sites and a reference protected wet prairie site with a large population of meadowlarks. Information from the reference site will be used to characterize the coarse-scale habitat features […]

Toward successful reintroductions: The combined importance of species traits, site quality, and restoration technique

Thomas N. Kaye   2011

Reintroduction of endangered plant species may be necessary to protect them from extinction, provide connectivity between populations, and reach recovery goals under the U.S. Endangered Species Act. But what factors affect reintroduction success? And which matter more: traits inherent to the species, qualities of the site, or reintroduction technique? Here I propose that all three […]

Mowing, mulching and seeding to control false-brome on the Eugene District, BLM, Oregon

Matt Blakeley-Smith and Thomas N. Kaye   2008

False-brome (Brachypodium sylvaticum) is an invasive perennial grass which is quickly spreading through the Pacific Northwest. Naturalized populations of False-brome have been observed in the Willamette Valley as early as the 1960’s. Recently, new populations have been observed in Washington and California. It is capable of completely dominating understory and open habitats to the exclusion of […]

Dispersal behavior and habitat variation of Taylor’s checkerspot butterfly

Thomas N. Kaye, et al.   2011

This project is intended to provide information about the Taylor’s checkerspot butterfly (Euphydryas editha taylori) habitat and dispersal behavior to support management of existing populations, habitat connectivity, reserve design, and overall recovery. This project addresses two project objectives, measurements of 1. dispersal behavior and 2. habitat characteristics. To meet objective 1, dispersal behavior, we conducted observations at one population in […]

Effects of cattle grazing, insect interactions, and population ecology of Snake River goldenweed (Haplopappus rediatus)

Thomas N. Kaye   2002

Background Snake River goldenweed (Haplopappus radiatus) is a rare plant of eastern Oregon and adjacent western Idaho. The species is listed as endangered by the State of Oregon Department of Agriculture and the Oregon Natural Heritage Program. It is considered a Sensitive Species by the Bureau of Land Management. The species occurs in arid shrub-steppe […]

Propagation of endangered species: Variable germination of pink sandverbena from Pacific coast beaches

Thomas N. Kaye   1999

Pink sandverbena (Abronia umbellata ssp. breviflora) is an endangered plant of Pacific Coast beaches. Restoration efforts have focused on the development of seed germination and field propagation techniques. Germination in the laboratory was highest when seeds were removed from the fruit and received alternating temperatures (20 C/30 C) and photoperiods. Benefits from cold stratification differed strongly from […]

Seeding and transplanting rare Willamette Valley prairie plants for population restoration

Thomas N. Kaye and Angela Brandt   2005

Prairies and oak savannah habitats once dominated the valleys and foothills in western Oregon and southwestern Washington. Fire suppression, invasive species, and habitat loss have substantially reduced the quantity and quality of this habitat. Several plant species of this ecosystem are considered rare, threatened or endangered. Their survival may depend reintroduction and population augmentation, as […]