Index Catalog // ScholarsArchive@OSU

Start Over

Filtering by: Creator Mather, Andrea Degree Field Wildlife Science

Serologic survey of infectious disease agents in black bears (Ursus americanus) of California, Oregon, and Washington

Creator:

Mortenson, Jack A.

Abstract:

The causes of natural mortality and disease in free ranging black bears, Ursus americanus, in California, Oregon, and Washington are poorly known. Life history components, such as scavenging and overlapping habitat with many species of carnivores, potentially expose bears to a wide range of infectious disease agents. To date, no...

Resource Type:

Masters Thesis

Full Text:

my family, Angel and Andrea, thank you for allowing me to put my love for learning ahead of family
Direct and indirect effects of livestock grazing intensity on processes regulating grassland bird populations

Creator:

Johnson, Tracey N.

Abstract:

In grasslands, grazing by large ungulates can influence vegetation structure, composition, primary productivity, and ultimately, ecosystem functioning. While grazing represents a complex disturbance, grazing intensity largely determines the effects of grazing on vegetation. Structural and compositional changes in the plant community caused by grazing could have bottom-up effects on species...

Resource Type:

Dissertation

Full Text:

, Joseph Smith, Michel Therrien, and Jessica Torres. I would especially like to acknowledge Andrea