Index Catalog // ScholarsArchive@OSU

Role of propagule pressure and priority effects on plant establishment during restoration of invaded shrub-steppe

Creator:: Schantz, Merilynn C.
Abstract:: Biological plant invasions are diminishing the ecological integrity and function of ecosystems worldwide. A primary example of this is in the Great Basin of the United States, where invasive annual grasses, like cheatgrass (Bromus tectorum L.) and medusahead (Taeniatherum caput-medusae L. Nevski), are dominating many sagebrush-steppe ecosystems. In these invaded...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Merilynn C. Schantz

Directing ecological succession : the role of competition in restoring semi-arid grasslands dominated by invasive plants

Creator:: Mangla, Seema
Abstract:: Successful ecosystem restoration requires an understanding of the ecological processes directing succession. One of the challenges in the semi-arid grasslands of western United States is replacement of native species by invasive annual grasses. Solutions to this problem require identifying and manipulating ecological processes that direct succession to favor desired vegetation....
Resource Type:: Dissertation
Full Text:: : _______________________________________________________ Roger L. Sheley Steven R. Radosevich

Characterization of Triticum turgidum ssp. carthlicum (Nevski) Löve et Löve by discriminant analysis

Creator:: Vieira, Luiz Gonzaga E.
Abstract:: Forty-six morphological characters were used in a study of Triticum turgidum ssp. carthlicum (2n = 28) and specimens of carthlicum-like forms of Triticum aestivum ssp. vulgare (2n = 42). The morphological variation patterns within these groups were examined using stepwise discriminant analysis. These results indicate that specimens studied could be...
Resource Type:: Masters Thesis
Full Text:: thank, too, Dr. Roger Petersen, Dr. Willis McCuistion, and Dr. Paul Doescher for accepting the

Climate-growth relationships of western juniper and ponderosa pine at the pine-woodland ecotone in southern Oregon

Creator:: Knutson, Kevin C.
Abstract:: Pinyon-juniper woodlands throughout the western U.S. have expanded rapidly following European settlement during the late 19th century. In central and eastern Oregon, western juniper (Juniperus occidentalis var. occidentalis Hook.) encroachment has been previously documented in the sagebrush steppe and upper elevation aspen communities. While these vegetation changes and dynamics have...
Resource Type:: Masters Thesis
Full Text:: OF Kevin C. Knutson for the degree of Master of Science in Forest Science presented on

Nutritional value of several Opuntia species

Creator:: Ben-Thlija, Abdellaziz
Abstract:: Little is known about cactus nutrients, their proportions in different species and the variability of these proportions with season. In the scant literature available on Opuntia species, no systematic survey has been published to document and compare the nutritional qualities of different species. Also, no studies have been done to...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy Williap/C. Krieger Little is known about cactus nutrients, their proportions in

A characterization of seasonal pools in Central Oregon's high desert

Creator:: Dlugolecki, Laura
Abstract:: Seasonal wetlands in arid and semi-arid lands provide an important source of surface water in otherwise dry lands. Central Oregon's high desert, located in the Northern Great Basin (NGB) is dotted with hundreds of seasonal pools, locally called playas. The playas hold water or snow during parts of winter and...
Resource Type:: Masters Thesis
Full Text:: member Paul Doescher for introducing me to many fascinating concepts about ecological restoration and

Quaking aspen persistence in three Oregon landscapes

Creator:: Seager, S. Trent
Abstract:: Quaking aspen (Populus tremuloides) is an important tree species in the western United States and there has been much concern about its persistence. In this thesis, I report on aspen in a portion of its range that has not been previously evaluated: the eastern and western slopes of the Central...
Resource Type:: Masters Thesis
Full Text:: cascades. I would also like to thank my graduate committee members, Paul Doescher and Marty Vavra

Demography of medusahead on two soil types : potential for invasion into intact native communities

Creator:: Miller, Heather C.
Resource Type:: Masters Thesis
Full Text:: invasion into intact native communities AN ABSTRACT OF 'HIE THESIS OF Heather C. Miller for the degree

An Investigation of soil, vegetation and mycorrhizal characteristics associated with native grass re-esablishment in crested wheatgrass seedings

Creator:: Raven, Karen A.
Abstract:: Since the 1930's, many fields on the Crooked River National grasslands have been seeded to crested wheatgrass (Agropyron desertorum). While some of these fields remain dominated by crested wheatgrass others had a greater presence of deep rooted native perennial grasses such as bluebunch wheatgrass (Pseudoroegneria spicata). Twenty eight fields previously...
Resource Type:: Masters Thesis
Full Text:: Wheatgrass Seedings Abstract approved: John C. Buckhouse Since the 1930's, many fields on the Crooked

Restructuring of land and community in the remote rural west : the case of Wallowa County, Oregon

Creator:: Abrams, Jesse
Abstract:: Since at least the 1970s, rural areas in the western United States, as elsewhere across the country and world, have been subject to social, economic, and political forces that have resulted in novel demographic and land tenure trends when compared to previous decades. Collectively, these processes of restructuring have created...
Resource Type:: Dissertation
Full Text:: : ___________________________________________________________________ John C. Bliss Since at least the 1970s, rural areas in the western United States, as

ScholarsArchive@OSU

Role of propagule pressure and priority effects on plant establishment during restoration of invaded shrub-steppe

Directing ecological succession : the role of competition in restoring semi-arid grasslands dominated by invasive plants

Characterization of Triticum turgidum ssp. carthlicum (Nevski) Löve et Löve by discriminant analysis

Climate-growth relationships of western juniper and ponderosa pine at the pine-woodland ecotone in southern Oregon

Nutritional value of several Opuntia species

A characterization of seasonal pools in Central Oregon's high desert

Quaking aspen persistence in three Oregon landscapes

Demography of medusahead on two soil types : potential for invasion into intact native communities

An Investigation of soil, vegetation and mycorrhizal characteristics associated with native grass re-esablishment in crested wheatgrass seedings

Restructuring of land and community in the remote rural west : the case of Wallowa County, Oregon

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