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Development and morphology of juvenile western juniper (Juniperus occidentalis Hook.)

Creator:: Kramer, Susanne
Abstract:: Whole tree excavation of 41 western juniper (Juniperus occidentalis Hook.), ranging in age from 2 to 34 years old, was used to assess the development and structure of root systems, to determine biomass allocation patterns, and to develop mathematical relationships for estimating biomass and root system dimensions in seedling and...
Resource Type:: Masters Thesis
Full Text:: Development and morphology of juvenile western juniper

Physiological ecology of western juniper (Juniperus occidentalis hook. subsp. occidentalis)

Creator:: Miller, Patricia M.
Abstract:: Patterns and costs of root/shoot allocations, response to reductions of above and below-ground tissue and to fertilization with nitrate and ammonium, and seasonal courses of physiological processes were measured on juvenile, small-adult, and large-adult Juniperus occidentalis growing in the field under ambient environmental conditions in eastern Oregon. Adult foliage had...
Resource Type:: Dissertation

Understory response to tree harvesting in pinyon-juniper woodlands

Creator:: Everett, Richard L.
Abstract:: Understory species associations and their association with tree species were examined on three intensively studied stands. We studied the chronosequence of understory species associated with different aged singleleaf pinyon (Pinus monophylla Torr. and Frem.) trees. Mid- to late pinyon-juniper understory succession was found to be more spatial than floristic in...
Resource Type:: Dissertation
Full Text:: Underatoy Response to Tree Harvesting in Pinyon-Juniper

Effect of western juniper on understory herbage production in Central Oregon

Creator:: Vaitkus, Milda R.
Abstract:: Evidence suggests that western juniper (Juniperus occidentalis) in Central Oregon affects understory production and composition. As trees increase in size and density, understory production is reduced and composition changes. This study was designed to identify the relationship between production and composition of understory vegetation and various tree canopy sizes of...
Resource Type:: Masters Thesis
Full Text:: Effect of western juniper on understory herbage production

Interception and water holding capacity of western juniper

Creator:: Larsen, Royce E.
Resource Type:: Dissertation

Community structure of old-growth Juniperus occidentalis woodlands

Creator:: Waichler, Wendy Sims
Abstract:: Knowledge of old-growth Juniperus occidentalis woodlands, which occur in central and eastern Oregon, is limited. Wise management of these woodlands necessitates a better understanding of the community ecology. The community structure of woodlands at seven sites in three areas of central Oregon was studied. Measurements taken at nine plots per...
Resource Type:: Masters Thesis
Full Text:: included correlation of juniper Redacted for PrivacyRedacted for Privacy cover with elevation, sand

Influence of leachates from western juniper slash on three native grasses

Creator:: Ramsey, Katherine J.
Abstract:: Paired 30-day trials were conducted to evaluate Agropyron spicatum germination when treated with two concentrations of throughfall leachates from western juniper slash in two stages of decomposition. Data from a second pair of 49-day greenhouse trials were analyzed to evaluate emergence and growth of Aqropyron spicatum, Oryzopsis hymenoides, and Poa...
Resource Type:: Masters Thesis

Effect of western juniper removal on ponderosa pine and associated understory vegetation

Creator:: Rose, Jeffrey A.
Abstract:: This research assessed the effect of western juniper (Junlperus occldentalls) removal on understory plant production and cover and ponderosa pine (Pinus ponderosa) growth and plant water status. A complete randomized block design, with four blocks and four treatments was established in the summer of 1984 near Prineville, Oregon. The four...
Resource Type:: Masters Thesis
Full Text:: Effect of western juniper removal on ponderosa pine and

Western juniper encroachment into aspen communities in the Northwest Great Basin

Creator:: Wall, Travis G.
Abstract:: In the Northwest Great Basin, aspen (Populus tremuloides) communities uniquely contribute to the biodiversity of a semi-arid, sagebrush-dominated landscape. In this same region, western juniper (Juniperus occidentalis) is encroaching into aspen stands. This study determined the timing, extent, and some of the effects of this expansion. Aspen stands below 2,133...
Resource Type:: Masters Thesis
Full Text:: : Western Juniper Encroachment into Aspen Communities in the Northwest Great Basin. Abstract approved

Analysis of hydrology and erosion in small, paired watersheds in a juniper-sagebrush area of central Oregon

Creator:: Fisher, Michael, (Michael Patrick), 1966-
Abstract:: Current research indicates that the expansion of western juniper can inhibit soil water retention, storage and prolonged releases from watersheds. This phenomenon is of great importance in eastern Oregon, as western juniper is encroaching into sagebrush/grass communities with a correlated reduction in herbaceous ground cover, resulting in reduced infiltration rates...
Resource Type:: Dissertation
Full Text:: of Hydrology and Erosion in Small, Paired Watersheds in a juniper-sagebrush Area of Central Oregon

ScholarsArchive@OSU

Development and morphology of juvenile western juniper (Juniperus occidentalis Hook.)

Physiological ecology of western juniper (Juniperus occidentalis hook. subsp. occidentalis)

Understory response to tree harvesting in pinyon-juniper woodlands

Effect of western juniper on understory herbage production in Central Oregon

Interception and water holding capacity of western juniper

Community structure of old-growth Juniperus occidentalis woodlands

Influence of leachates from western juniper slash on three native grasses

Effect of western juniper removal on ponderosa pine and associated understory vegetation

Western juniper encroachment into aspen communities in the Northwest Great Basin

Analysis of hydrology and erosion in small, paired watersheds in a juniper-sagebrush area of central Oregon

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