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Spatial and age class analysis of managed western juniper (Juniperus occidentalis) woodlands in central Oregon

Creator:: Zophy, Kelley T.
Abstract:: Juniper is a native species to Oregon and confers ecological benefits to wildlife when it is at savannah and transitional densities. Its range and extent have fluctuated with climatic change, but the current range expansion is unprecedented in its extent. The range expansion has been associated with the degradation of...
Resource Type:: Masters Thesis

Persistence of western juniper resource islands following canopy removal

Creator:: Miwa, Christopher
Abstract:: Western juniper (Juniperus occidentalis) cover has more than doubled within the last century and currently occupies over 9 million acres in the Intermountain West. Encroachment has altered the spatial distribution of soil nutrients and plants in these systems, forming nutrient enriched 'resource islands,' under tree canopies. The purpose of this...
Resource Type:: Masters Thesis
Full Text:: in treated juniper plots has been more rapid in other studies (Vaitkus and Eddleman, 1987; Evans

Time-based nitrogen availability and risk of Taeniatherum caput-medusae (L.) Nevski invasion in central Oregon

Creator:: Stubbs, Michelle M.
Abstract:: During the last century, fire suppression, grazing, and climate change have caused sagebrush grasslands to be altered in both function and form; juniper and sagebrush dominate the landscape at the expense of herbaceous plants. Management efforts to reduce juniper and sagebrush overstory in order to enhance herbaceous components of the...
Resource Type:: Masters Thesis
Full Text:: mechanism for invasion potential. Bassett, R. (1989) Moderator's comments. Areal growth and distribution

Vegetation and soil response to tree removal methods in invasive western juniper woodlands

Creator:: O'Connor, Casey A.
Abstract:: On piñon-juniper encroached sites that lack the understory fuels to carry a prescribed fire, treatment options are limited to mechanical methods. Cutting with chainsaws and leaving the trees on site has been the primary treatment method for such sites, however this method creates a potential fire hazard, particularly in the...
Resource Type:: Masters Thesis
Full Text:: juniper (Vaitkus and Eddleman 1987, Bates et al. 1998, Bates et al. 2000, Eddleman 2002, Bates et al

Folic acid and ascorbic acid status of elderly subjects

Creator:: Lee, Mei-shan
Abstract:: Folic acid and ascorbic acid status have been assessed in twenty non-institutionalized elderly subjects with respect to both hematological and dietary aspects. The hemoglobins, hematocrits, and serum ascorbic acid concentrations were within the normal range. A few subjects had total serum protein concentrations which were less than the acceptable level....
Resource Type:: Masters Thesis
Full Text:: ) 13 .62(M) Elwood et al. (1971) >65 533 304 229 13 .4(F) 14.6(M) 41.8(F) 45.7(M) 6.7(F) r

Potential utilization of western juniper residues

Creator:: Sichamba, Kennedy
Abstract:: Logging and forest thinning operations generate large amounts of residues in the form of small trees, branches and foliage that are usually left on the ground to decay or are burned. These resources are readily available, but it is uneconomical to remove them from the forest. The potential utilization of...
Resource Type:: Masters Thesis
Full Text:: % juniper leaf oil and exposed to R. flavipes in an AWPA standard E1 test. 38 Table 5. Yields of essential

The influence of environmental attributes on temporal and structural dynamics of western juniper woodland development and associated fuel loading characteristics

Creator:: Johnson, Dustin D.
Abstract:: Since European American settlement of the Intermountain Region, dramatic changes in vegetation composition and structure have occurred in the sagebrush steppe ecosystem. Western juniper (Juniperus occidentalis spp. occidentalis Vasek), although indigenous to the Intermountain Region, has increased since the late 1800s. Considerable work has been done documenting juniper woodland expansion...
Resource Type:: Masters Thesis
Full Text:: density increases, herbaceous and shrub biomass declines (Clary and Jameson 1981, Doughty 1987, Vaitkus

Re-establishment of native perennial bunchgrasses in juniper/medusahead rangelands

Creator:: Washington, Joseph P.
Resource Type:: Masters Thesis
Full Text:: after western juniper control in central Oregon (Vaitkus and Eddleman, 1987). Annual grasses were

"The Island" Research Natural Area : a vegetation study with time and location comparisons

Creator:: Fox, M. Anne, 1939-
Abstract:: The purpose of this study was to document vegetation on "The Island", a Research Natural Area at the confluence of the Crooked River and the Deschutes River in central Oregon's Juniperus occidentalis Zone and to compare the results with an earlier study reported in 1964 from 1960-'61 data. Present-day comparisons...
Resource Type:: Masters Thesis
Full Text:: interest in this study, to Richard R. Halse who along with other helpful input has provided his plant

Soil surface effects on soil water, soil temperature, and Douglas-fir seedling injury following radiation frost damage events

Creator:: Melton, Lisa L.
Abstract:: A microclimatology study was conducted on a high elevation clearcut near the summit of Mt. Ashland in southwest Oregon to evaluate the effects of frost on Douglas-fir seedling growth and survival. Frost and low temperatures cause seedling stress through frost damage, frost desiccation, increased root resistance, and decreased rates of...
Resource Type:: Masters Thesis
Full Text:: believing in me, and kept challenging me to go farther than I thought I could. Thank you Stu. Milda, my

ScholarsArchive@OSU

Spatial and age class analysis of managed western juniper (Juniperus occidentalis) woodlands in central Oregon

Persistence of western juniper resource islands following canopy removal

Time-based nitrogen availability and risk of Taeniatherum caput-medusae (L.) Nevski invasion in central Oregon

Vegetation and soil response to tree removal methods in invasive western juniper woodlands

Folic acid and ascorbic acid status of elderly subjects

Potential utilization of western juniper residues

The influence of environmental attributes on temporal and structural dynamics of western juniper woodland development and associated fuel loading characteristics

Re-establishment of native perennial bunchgrasses in juniper/medusahead rangelands

"The Island" Research Natural Area : a vegetation study with time and location comparisons

Soil surface effects on soil water, soil temperature, and Douglas-fir seedling injury following radiation frost damage events

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