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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

Studies to facilitate reintroduction of golden paintbrush (Castilleja levisecta) to the Willamette Valley, Oregon

Creator:: Lawrence, Beth A.
Abstract:: Golden paintbrush (Castilleja levisecta Greenman) historically inhabited the prairies of the Willamette Valley, Oregon. However, this Pacific Northwest endemic is currently restricted to eleven sites in the Puget Trough of Washington and British Columbia. Recovery criteria call for the establishment of new populations throughout the species historic range, including the...
Resource Type:: Masters Thesis
Full Text:: Willamette Valley, Oregon. Abstract approved: Thomas N. Kaye Golden paintbrush (Castilleja levisecta

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

Regeneration biology of Erigeron decumbens var. decumbens, an endangered plant of the Willamette Valley

Creator:: Clark, Deborah Louise, 1950-, Finley, Karen K., and Ingersoll, Cheryl A.
Abstract:: Erigeron decumbens var. decumbens, the Willamette daisy, is known only from the Willamette Valley of Oregon. Herbarium records, from the 1800's until 1934, indicate that the Willamette daisy was once common and widely distributed throughout the Willamette Valley (Clark et al. 1993). However, between 1934 and 1980, this taxon was...
Resource Type:: Technical Report
Full Text:: , Oregon 1 April 1995 INTRODUCTION Background Erigeron decumbens var. decumbens, the Willamette daisy

Ecological and mortality factors affecting the nesting stage of the Chinese pheasant, Phasianus torquatus Gmelin, in the Willamette Valley, Oregon

Creator:: Eklund, Carl Robert
Resource Type:: Masters Thesis
Full Text:: Stage of the Chinese Pheasant, Phasianus torquatus, Gmelin in the Willamette Valley, Oregon AN

Quilts and quilt-making in the Willamette Valley of Oregon

Creator:: Meloy, Betty Thiessen
Abstract:: This thesis is a documentation of a selected number of nineteenth century quilts studied by the investigator in the Willamette Valley. The quilts were located in museums and in individual's homes. A questionnaire, that was developed for this study of quilts, was filled out as each quilt was examined. Slides...
Resource Type:: Masters Thesis

Progress of irrigation research on Willamette Valley soils

Creator:: Oregon State University. Agricultural Experiment Station
Abstract:: The future expansion of agricultural production in the Willamette Valley will depend to a large degree upon the feasibility of introducing irrigated agriculture on the poorly drained soils in the Valley. A r earch program has been initiated to investigate the feasibility of rigation on poorly drained soils with the...
Resource Type:: Technical Report
Full Text:: Progress of Irrigation Research On Willamette Valley Soils Agricultural Experiment Station, Oregon State

The Ore bin ; Vol.24, No.3 (March 1962)

Creator:: Oregon. Dept. of Geology and Mineral Industries and Glenn, Jerry L.
Resource Type:: Journal
Full Text:: Vol. 24, No. 3 March, 1962 GRAVEL DEPOSITS IN THE WILLAMETTE VALLEY BETWEEN SALEM AND OREGON CITY

The possibilities and problems of forest farming in the Willamette Valley with particular reference to the determination of economic size

Creator:: Collard, Charles G.
Resource Type:: Undergraduate Thesis
Full Text:: Willamette Valley with particular reference to the determination of economic size The Possibilities and

Population and occurrence of birds in varying cover types of the Willamette Valley

Creator:: Buchanan, Robert Leland
Resource Type:: Masters Thesis
Full Text:: of the Willamette Valley POPULATION AND OCCURRENCE OF BIRDS IN VARYING COVER TYPES OF rHE

ScholarsArchive@OSU

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

Studies to facilitate reintroduction of golden paintbrush (Castilleja levisecta) to the Willamette Valley, Oregon

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

Regeneration biology of Erigeron decumbens var. decumbens, an endangered plant of the Willamette Valley

Ecological and mortality factors affecting the nesting stage of the Chinese pheasant, Phasianus torquatus Gmelin, in the Willamette Valley, Oregon

Quilts and quilt-making in the Willamette Valley of Oregon

Progress of irrigation research on Willamette Valley soils

The Ore bin ; Vol.24, No.3 (March 1962)

The possibilities and problems of forest farming in the Willamette Valley with particular reference to the determination of economic size

Population and occurrence of birds in varying cover types of the Willamette Valley

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