Index Catalog // ScholarsArchive@OSU

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:: Rangeland Ecology and Management presented on June 19, 2009 Title: Vegetation and Soil Response to Tree

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:: grazing allotment in Eastern Oregon where trees had been cut 1, 8 and 15 years ago. In each age class

Seed bank response to juniper expansion in the semi-arid lands of Oregon, USA

Creator:: Duncan, Corinne M.
Abstract:: Expansion of Juniperus occidentalis into the sagebrush steppe has resulted in significant changes in understory composition. A consequence of increased J. occidentalis dominance may be a depletion of the seed bank. The potential for depletion is problematic because a reduction in the amount of species available from the seed bank...
Resource Type:: Masters Thesis
Full Text:: . 1976. Emergent Seedlings from Coniferous Litter and Soil in Eastern Oregon. Ecology. 57(4):801-807

Quantification of vegetation diversity and variation on intact and degraded rangelands

Creator:: Dysart, Patricia L.
Abstract:: Vegetation diversity in the Wyoming big sagebrush/Thurber needlegrass (Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young/Achnatherum thurberianum (Piper) Barkworth. syn. Stipa thurberiana Piper) plant association was studied across a condition class gradient in southeastern Oregon. All observable vascular plant species were counted during 6 seasons and 2 years and diversity...
Resource Type:: Dissertation
Full Text:: (continued) Fi2ure Pa2e 4.5 Patterned soil in the sagebrush steppe of eastern Oregon(photo

Acidifying soil in landscapes and gardens east of the Cascades

Creator:: Oregon State University. Extension Service, Locke, Kerry A., Horneck, D., Hart, J., and Stevens, R.
Abstract:: The comfortable, sunny climate and numerous recreational activities east of the Cascade Mountain Range in Oregon and Washington attract many new residents each year. Unfortunately, these new residents often fi nd that their previous gardening experience doesn’t translate into success in their new environment. Long-time residents also are frustrated by...
Resource Type:: Technical Report
Full Text:: , Extension faculty, Umatilla and Morrow counties, Oregon State University; John Hart, Extension soil

Groundwater elevations and temperature adjacent to a beaver pond in central Oregon

Creator:: Lowry, Michael M.
Abstract:: This study was designed and implemented to observe the spatial and temporal dynamics of groundwater levels and temperatures adjacent to a beaver pond in semi-arid central Oregon. The study site was located on the eastern boundary of Painted Hills National Monument along Bridge Creek, a tributary to the John Day...
Resource Type:: Masters Thesis

Eastern Oregon liming guide

Creator:: Sullivan, Dan M. (Dan Matthew), 1954-, Horneck, Donald Arthur, Wysocki, Donald John, 1952-, and Oregon State University. Extension Service
Abstract:: Liming is a new practice for the inland Pacific Northwest, necessitated by soil acidification caused by nitrogen fertilization. This publication provides guidance on how to evaluate cropping systems for lime need and how to determine lime application rate.
Resource Type:: Technical Report
Full Text:: Eastern Oregon Liming Guide 1 Why is liming needed now

Community analysis of the Wyoming big sagebrush alliance and functional role of Wyoming big sagebrush

Creator:: Davies, Kirk W.
Abstract:: This study consisted of two research projects in the Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis (Beetle & A. Young) S.L. Welsh) alliance, the most extensive of the big sagebrush complex in the Intermountain West. In the first project, we intensively sampled 107 relatively undisturbed, late seral Wyoming big sagebrush...
Resource Type:: Dissertation
Full Text:: my appreciation to the people who have contributed to this project. Eastern Oregon Agricultural

An evaluation of understory vegetation dynamics, ecosystem resilience and state and transition ecological theory in an eastern Oregon ponderosa pine forest

Creator:: Carr, Craig A.
Abstract:: Relatively recent increases in ponderosa pine abundance have effected unprecedented changes to ecosystem structure and function. Efforts to restore ponderosa pine systems are often focused on the manipulation of tree structure and the re-introduction of a more natural fire regime. Successful restoration should also incorporate understory components but information addressing...
Resource Type:: Dissertation
Full Text:: dynamics. The analyses of vegetation, soil, and environmental attributes measured in a eastern Oregon

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:: experiments that were evaluated on seeded annual grass invaded sagebrush-steppe ecosystems in eastern Oregon

ScholarsArchive@OSU

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

Persistence of western juniper resource islands following canopy removal

Seed bank response to juniper expansion in the semi-arid lands of Oregon, USA

Quantification of vegetation diversity and variation on intact and degraded rangelands

Acidifying soil in landscapes and gardens east of the Cascades

Groundwater elevations and temperature adjacent to a beaver pond in central Oregon

Eastern Oregon liming guide

Community analysis of the Wyoming big sagebrush alliance and functional role of Wyoming big sagebrush

An evaluation of understory vegetation dynamics, ecosystem resilience and state and transition ecological theory in an eastern Oregon ponderosa pine forest

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

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