The old-growth forest conflict is part of the evolving debate over how to use the federal
public lands. This study documents the origins and development of the old-growth issue through
1989. The controversy began in the early 1970s when scientists initiated studies of old-growth
forests and northern spotted owls, and...
This research examined the biology of barb goatgrass (Aegilops triuncialis L.) a weedy annual grass that is invading the rangelands of California. Germination and root growth characteristics of barb goatgrass were compared to soft chess (Bromis mollis L.), medusahead rye (Taeniatherum caput-medusae (L.) Nevski), slender wild oats (Avena barbata L.),...
Through the trapping of sediment behind dams, the
presence of beaver in a watershed may cause substantial
changes to fluvial and geomorphic processes. In an
effort to investigate sedimentation patterns in beaver
ponds in the Oregon Coast Range, a case study was made of
the annual accumulation of sediment in...
Meyer's Canyon, a tributary of Bridge Creek in the John Day
Basin, is a deeply incised valley fill in northcentral Oregon. The
current channel is incised to the Cretaceous and Tertiary bedrock.
To determine the precedence of the current incision and the variation
and timing of depositional sequences, the sediments...
Summer low-flow behavior in the semi-arid areas of the Pacific Northwest was studied. Long-term data from thirty-eight streams/rivers and thirty-six precipitation stations was exploited. The study area was divided into five zones based on annual average precipitation. Trends and patterns
in summer low-flows and precipitation were identified. Different zones showed...
Sediment production and delivery in Pacific Northwest
coastal streams can have damaging effects on channel
morphology and anadromous fish habitat. The research in
Pistol River was designed to determine if a link exists
between sediment delivery processes and degradation of fish
habitat. Objectives of this basin-wide analysis were to:
1)...
A Study conducted at The Island, Lake Billy Chinook, in Central Oregon, examined
differences in the pattern of soil properties between a sagebrush-grass and a juniper-sagebrush-grass community. Juniper invasion is linked with the desertification
process in which the sagebrush shrubs and perennial grasses decline. Patterns in soil
nutrients and other...
Distance-based algorithms are machine learning algorithms that classify queries
by computing distances between these queries and a number of internally stored
exemplars. Exemplars that are closest to the query have the largest in
uence on
the classi cation assigned to the query. Two speci c distance-based algorithms, the
nearest neighbor...
Forest recreation is one of the many non-commodity functions of forests that have
experienced a rapid growth in demand in the past few decades. Even faster growth in
demand for recreation is expected for several decades. However, such growing demand
for forest recreation is often not well perceived by owners...
Students often have difficulty completing their college
education. Some leave during their freshmen year, others
later in their careers. Many factors contribute to the
decision to withdraw, often relating to the individual
student, or the institution. Literature indicates that the
decision to withdraw is frequently based on student involvement.
This...
There were two purposes for this thesis. First, it sought to define and clarify key
concepts of recreational conflicts based on a literature review on the concept of
conflict in the social sciences in general and in outdoor recreation. Second, it tested
several hypotheses emerging from the preceding literature review...
Heuristics based on Monte-Carlo Integer Programming (MCIP) and Tabu Search
(TS) techniques were developed for generating easily implementable bucking rules that are
applicable to entire stands (as opposed to individual stem classes), and for selecting the
rule-set that provides the best feasible solution (given log prices and market constraints).
A...
The fundamental aim of this study was to determine how Malaysians define both leisure
and recreation. Two ethnic groups, Chinese and Malays, and rural and urban variants of these
groups were included in the sample. The other objective was to determine if there were differences
in the definitions due to...
Stressful events of both major and minor magnitude in
the lives of children and adolescents are significantly
related to emotional and behavioral problems (Compas, 1987a;
Johnson, 1986). It is also apparent, however, that this
relationship is complicated and that individuals vary greatly
in their responses to stress. The purpose of...
Most of the methods currently used to measure root respiration introduce various disturbances which may lead to biased results, and require destruction of roots which does not permit repeated measurements of root growth and respiration. A root box method was developed for measurement of root respiration, as well as root...
Riparian forests in the central Oregon Coast Range vary along a coniferous-deciduous compositional continuum. Variations in structure and composition affect water quality, fish and wildlife, biodiversity, timber, and aesthetics. A retrospective approach was taken in this study in order to understand and compare the structure, pattern, and history of an...
Changes in the concentrations of dissolved ammonia (NH4+1), nitrate (NO3-1), organic nitrogen (DON) were monitored along ground water flow paths to determine the importance of the ground water system to the stream nitrogen budget. The study site was located on a wide floodplain along a fourth-order
stream in the Oregon...
There is renewed interest in agroforestry as a management strategy for marginal agricultural lands in western Oregon. Silvopastoral systems combine tree and
forage production, which involve crops and practices familiar to the area. The objective of this study was to determine how
management influences the physiology and ecological interactions of...
During the Cenozoic, tectonics in the Cuyama basin of the southeastern Salinian block changed from extension to strike-slip faulting to compression and rotation. During the Oligocene-early Miocene, the Cuyama basin was adjacent to the southern Mojave region and part of that extensional tectonic regime. Many present-day reverse faults have an...
Parameters: Trip purpose, sign visibility, listenership, message quality, demographics
Research Area/Region: Transmitter location atop Hoodoo Butte, at Hoodoo Ski Resort.
The Hoodoo Butte is located within the Deschutes National Forest.
Site Location: The transmitter located atop Hoodoo Butte is permanent. The broadcasts
are played in a continuous cycling ioop The...