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Recruitment predictors of an endangered prairie species : a case study of Erigeron decumbens

Creator:: Gallagher, Katie J.
Abstract:: Preservation of rare plant species often requires establishment of new populations. Survivorship surveys are the most common method of post-introduction monitoring. However, they provide an incomplete picture of establishment success. This study is an attempt to develop a model for determining establishment success by determining the factors affecting recruitment in...
Resource Type:: Masters Thesis
Full Text:: species. Erigeron decumbens is an endangered forb endemic to the Willamette Valley of western Oregon

Notes on some of the weeds of the Willamette Valley

Creator:: Gilbert, Henry C.
Resource Type:: Masters Thesis
Full Text:: : Widely distributed and often abundant in hills of the Willamette Valley. Habitat: Pasture lands in

Synecology of the white-oak (Quercus garryana Douglas) woodlands of the Willamette Valley, Oregon

Creator:: Thilenius, John F., 1931-
Abstract:: Quercus garryana dominated plant communities are found in the interior coastal valleys and on foothills from southeastern Vancouver Island, British Columbia, south to San Francisco, California. They occur as savannas, intermixed with a variety of conifers, and in almost pure stands. The diversity of habitats occupied by the species and...
Resource Type:: Dissertation
Full Text:: ) woodlands of the Willamette valley, Oregon AN ABSTRACT OF THE THESIS OF JOHN FREDRICK THILENIUS for the

Population characteristics of exotic plants in a Willamette Valley native prairie

Creator:: Lantz, Lisa E.
Resource Type:: Masters Thesis
Full Text:: Conservancy (1983) to list Willamette Valley prairies as one of the most endangered habitats in Oregon. My

Functional groups, traits, and the performance of species in restoration

Creator:: Roberts, Rachael E. (Rachael Elaine)
Abstract:: In ecological restoration, species that are sown to increase the native plant diversity range in establishment ability. Some species readily establish, while others rarely do. This study set out to investigate some of the potential processes influencing species establishment, as well as the traits that are associated with the success...
Resource Type:: Masters Thesis
Full Text:: this study, native to upland prairies in the Willamette Valley of Oregon

The Classification of the Common Orders of Plants Found Around Corvallis

Creator:: King, Bertha Anna and Starr, Grace E.
Abstract:: In collecting our representative flowering plants, we have endeavored to secure a specimen of each common genus of annuals and biennials as well as a few shrubs. The notes, drawings, and classification of fifty of these plants constitute the main part of our thesis. Following are the classifications of various...
Resource Type:: Undergraduate Thesis
Full Text:: . These are: 1. The Mary's River and Willamette banks, in cluding Crystal Lake, south and east of

The effects of site preparation on native forb establishment in a wet prairie, Willamette Valley, Oregon

Creator:: Norman, Katherine N.
Abstract:: Wetlands and wet prairies are economically and environmentally valuable ecosystems, but many have been degraded or converted to other uses. As human understanding of wetlands' value has increased, restoration efforts have grown correspondingly. Restoration attempts use a diversity of methods, which often include seeding with native plant species. This thesis...
Resource Type:: Masters Thesis
Full Text:: Establishment in a Wet Prairie, Willamette Valley, Oregon Abstract approved: Patricia S. Muir

Reproductive isolation and interspecific hybridization in the threatened species, Sidalcea nelsoniana

Creator:: Gisler, Steven D.
Abstract:: In addition to its longstanding recognition as an influential evolutionary process, interspecific hybridization is increasingly regarded as a potential threat to the genetic integrity and survival of rare plant species, manifested through gamete wasting, increased pest and disease pressures, outbreeding depression, competitive exclusion, and genetic assimilation. Alternatively, hybridization has also...
Resource Type:: Masters Thesis
Full Text:: the Willamette Valley in western Oregon. These four perennial species share a high risk of

Presence and pathogenicity of Fusarium and Verticillium species in commercial red radish (Raphanus sativus) seed production in the Willamette Valley of Oregon

Creator:: Bomberger, Rachel A.
Abstract:: Commercial radish seed producers in the Willamette Valley of Oregon have observed a late season wilt in their seed fields. Twenty-two fields were surveyed for wilt in the Willamette Valley during June through August 2012 and 2013. Plants exhibiting wilt symptoms were collected from the fields and examined for vascular...
Resource Type:: Masters Thesis
Full Text:: (Raphanus sativus) Seed Production in the Willamette Valley of Oregon. Abstract Approved

Factors affecting establishment and germination of upland prairie species of conservation concern in the Willamette Valley, Oregon

Creator:: Jones, Katherine D.
Abstract:: Identifying mechanisms that determine who lives and dies is the first step in developing successful restoration techniques for rare species and endangered habitats. We studied interactions that affect establishment of native plant forbs of conservation concern at the seedling stage to support the theoretical basis for restoration activities in Pacific...
Resource Type:: Masters Thesis
Full Text:: Conservation Concern in the Willamette Valley, Oregon Abstract approved

ScholarsArchive@OSU

Recruitment predictors of an endangered prairie species : a case study of Erigeron decumbens

Notes on some of the weeds of the Willamette Valley

Synecology of the white-oak (Quercus garryana Douglas) woodlands of the Willamette Valley, Oregon

Population characteristics of exotic plants in a Willamette Valley native prairie

Functional groups, traits, and the performance of species in restoration

The Classification of the Common Orders of Plants Found Around Corvallis

The effects of site preparation on native forb establishment in a wet prairie, Willamette Valley, Oregon

Reproductive isolation and interspecific hybridization in the threatened species, Sidalcea nelsoniana

Presence and pathogenicity of Fusarium and Verticillium species in commercial red radish (Raphanus sativus) seed production in the Willamette Valley of Oregon

Factors affecting establishment and germination of upland prairie species of conservation concern in the Willamette Valley, Oregon

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