Chinook salmon returns to the Columbia River basin have declined due to impacts of a growing human population, despite significant mitigation expenditures. Consequently, fisheries managers have become focused on recovery and long-term viability of at-risk populations. A viable population depends, in part, on the connectivity and quality of diverse habitat...
Abstract Valleys of headwater channels in the Oregon Coast Range impound significant amounts of sediment, with the majority of deposits originating as debris flows. Headwater valleys function as transitional sedimentary reservoirs linking hillslope sources in active orogens to sinks in sedimentary basins, yet the residence time of deposits in the...
In the Pacific Northwest snow is an important
natural resource. The inability to accurately measure or
monitor this resource throughout remote areas is a hindrance
to water management. ERTS-1 imagery provides the capability
for extracting a significant amount of scientific information
and data regarding snow conditions in accessible and inaccessible...
In the Pacific Northwest snow is an important
natural resource. The inability to accurately measure or
monitor this resource throughout remote areas is a hindrance
to water management. ERTS-1 imagery provides the capability
for extracting a significant amount of scientific information
and data regarding snow conditions in accessible and inaccessible...
Full Text:
) IMAGERY FOR DELINEATING SNOW EXTENT:
CRATER LAKE NATIONAL PARK, OREGON
PAUL W. ROSE
submitted to
THE
In the Pacific Northwest snow is an important natural resource. The inability to accurately measure or monitor this resource throughout remote areas is a hindrance to water management. ERTS-1 imagery provides the capability for extracting a significant amount of scientific information and data regarding snow conditions in accessible and inaccessible...
Barley and cereal yellow dwarf viruses (B/CYDV) are a suite of aphid-vectored pathogens that affect diverse host communities, including economically important crops. Coinfection of a single host by multiple strains of B/CYDV can result in elevated virulence, incidence, and transmission rates. We develop a model for a single host, two...
Full dynamic control of physically simulated characters is the holy grail of video
games and other interactive applications. Recent advances in the field have
presented controllers that can handle the balance and fall response after a
collision. This thesis addresses the development of a controller that handles the
response before...
In surveys of residents in three urban and three rural locations in the Great Basin we examined the social acceptability of six management practices showing promise for restoring sagebrush-dominated rangelands. Unlike most studies of range management perceptions that have relied on single measurements, we used longitudinal data from a questionnaire...
Sphaerellopsis filum is a mycoparasite of Puccinia graminis subsp. graminicola, a rust fungus that causes widespread crop damage on perennial ryegrass grown for seed. In observations taken over the winter months, S. filum was found naturally colonizing 2% of P. graminis subsp. graminicola uredinia on first-year plantings and 25% of...