Index Catalog // ScholarsArchive@OSU

Start Over

Filtering by: Creator United States. Forest Service. Intermountain Region Advisor Pyke, David A. Committee Member Doescher, Paul

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:

Basin and Range physiographic province of the United States (Hunt 1967). Geology is generally
The effects of defoliation on Bromus tectorum seed production and growth

Creator:

Mayer, Kara Hempy

Abstract:

Cheatgrass (Bromus tectorum L.) is a widespread exotic weed in the Intermountain sagebrush steppe. An annual grass, it is highly prolific and very competitive with native perennial grass seedlings. A clipping experiment carried out at two cheatgrass-dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation...

Resource Type:

Masters Thesis

Full Text:

the United States Geological Survey and the Department of Botany and Plant Pathology, Oregon State
Demography of medusahead on two soil types : potential for invasion into intact native communities

Creator:

Miller, Heather C.

Resource Type:

Masters Thesis

Full Text:

drour'hi medusahead strains from the western United States (lifter in their seed dormancy characteristics