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Filtering by: Committee Member Svejcar, Tony

Response of Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) to defoliation of understory grasses and drought

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
Nutritional and managerial considerations for wintering beef cattle in the northern Great Basin

Creator:

Brandyberry, Steven D.

Abstract:

A study was conducted to determine effects of year and season on diet quality of beef cattle grazing northern Great Basin rangelands from 1990 to 1993. Forage quality was high early in the growing season, then declined as seasons progressed (P<.05). Plant chemical composition was higher early in the growing...

Resource Type:

Dissertation
Drivers of plant community dynamics in sagebrush steppe ecosystems : cattle grazing, heat and water stress

Creator:

Reisner, Michael D.

Abstract:

Sagebrush steppe ecosystems are one of the most widespread but endangered ecosystems in North America. A diverse array of human-related stressors has gradually compromised these ecosystems' resilience to disturbance and invasion by Bromus tectorum (cheatgrass). The role of the foundational shrub Artemisia as a driver of herbaceous community structure and...

Resource Type:

Dissertation