Index Catalog // ScholarsArchive@OSU

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:: occurred in the sagebrush steppe ecosystem. Western juniper (Jun iperus occidentalis spp. occidentalis

Creator:: Petersen, Steven Lawrence
Abstract:: Western juniper has rapidly expanded into sagebrush steppe communities in the Intermountain West during the past 120 years. This expansion has occurred across a wide range of soil types and topographic positions. These plant communities, however, are typically treated in current peer-reviewed literature generically. The focus of this research is...
Resource Type:: Dissertation
Full Text:: expanded into sagebrush steppe communities in the Intermountain West during the past 120 years. This

Creator:: Purrington, Teal Mackenzie
Abstract:: Water potential, leaf conductance, growth, nitrogen content, and seedling survival of Wyoming Big Sagebrush (Artemisia tridentata ssp. wyomingensis) following defoliation of the herbaceous understory were assessed during two growing seasons. Precipitation was 107% and 63% of the long-term mean (283 mm) in 1989 and 1990, respectively, which presented an opportunity...
Resource Type:: Masters Thesis
Full Text:: shrub in North America. It is the dominant shrub characterizing the Intermountain Sagebrush Steppe

Creator:: Smergut, Teresa A.
Abstract:: Ranchers and resource managers have become concerned about the role and spread of Cardaria draba (L.) Desv. (whitetop) in the sagebrush steppe of Northeastern Oregon. This area is an important natural resource for livestock production and big game winter range. An area near Keating, Oregon was selected to study the...
Resource Type:: Masters Thesis
Full Text:: ) in the sagebrush steppe of Northeastern Oregon. This area is an important natural resource for

Creator:: Sapsis, David B.
Abstract:: The vegetation response of spring and fall prescribed fires in basin big sagebrush (Artemisia tridentata subsp. tridentata Nutt.)/Idaho fescue (Festuca idahoensis Elmer)--bluebunch wheatgrass (Agropyron spicatum Pursh. (Scribn. & Smith)) communities was measured at the John Day Fossil Beds National Monument in eastern Oregon. Objectives of the study were to quantify...
Resource Type:: Masters Thesis

Creator:: Champlin, Mark R. (Mark Randolph)
Abstract:: Four studies were conducted. First, mountain big sagebrush communities were burned at Lava Beds National Monument, California, and The Crooked River National Grassland, Oregon. In two years at Lava Beds, basal cover of Idaho fescue in one community and Thur- ber's needlegrass in one of three communities did not recover....
Resource Type:: Dissertation
Full Text:: Big sagebrush (Artemisia tridentata) ecology and

ScholarsArchive@OSU