Site formation processes at Ayia Varvara Asprokremnos, a potentially early Neolithic archaeological site on Cyprus, are examined in order to build a larger predictive model. The study area immediate to the site encompasses 6.33 hectares and includes the site and alluvial terraces on both sides of the Gialias River. Fourteen...
The relationship between carbon burial and sedimentation in reservoirs is unknown, exposing gaps in our fundamental understanding of the transport, processing, and deposition of sediment and organic matter in fluvial and lacustrine systems and contributing to uncertainty in our understanding of the net impact of dams to the global carbon...
The primary objective of this study was to estimate the impact
that an increase in recreational expenditures, resulting from water
quality improvements of Klamath Lake, would have upon the Klamath
County economy. As the sales of the economy expand to serve the
needs of the recreationists, real benefits will be...
Provides information about complexity of watersheds. Outlines ways to form partnerships, to develop strategies for enhancing watershed resources, and to implement enhancement projects.
Concern over the need to provide open space in communities
for recreation and other uses and to estimate the public values
involved is apparent to regional planners. This need, particularly
evident in natural resource planning, indicates that more sophisticated
analytical techniques be developed.
The primary thrust of this study is...
The major purpose of this study was to test the relationship between
students' cerebral lateralization for the Arabic language and
their achievement in science. A secondary purpose was to investigate
handedness as a factor in that relationship. The experiment was conducted
in the City of Jeddah, Saudi Arabia, using dichotic...
This thesis is a work of literary non-fiction. It
is divided into six sections. The first, "A Sense of
Place," and the last, "Pulling a Geographical," are
collage essays which establish and then reiterate major
themes in the work: movement, work, geography,
climate, people, and education--some curricular, some
not. The...
Aflatoxins B₁, Q₁ and aflatoxicol, R [subscript o] F, but not B₂ were activated in the presence of NADPH by the 105,000 x g pellet from rainbow
trout (Salmo gairdneri), Mt. Shasta strain, liver to products lethal to
Bacillus subtilis GSY 1057 (metB4, hisAl, uvr-1). Electron microscopy
confirmed the microsomal...
Linear economic models were utilized to predict effects of various
environmental control policies on individual firms. Four different
linear models were specified and in some instances relatively
minor changes in specification were made which resulted in additional
sub-models. Models varied as to numbers and types of fixed
factors, variable cost...
The variability in morphologic, chemical, and physical soil
properties within the Willakenzie silty clay loam, 2 to 12 percent
slopes, map unit in Yamhill County, Oregon was measured.
The objectives of the study included (1) describing the frequency
distributions of individual soil properties, (2) measuring the
taxonomic composition of the...
The variability of selected physical, chemical, and morphological
soil properties in two landtype mapping units on'the Rogue River National
Forest in southwestern Oregon was studied.
The objectives of the study were (i) to quantify soil variability
in several soil resource inventory mapping units, (ii) to explore methods
of describing soil...
The nature of the bioluminescence of Gonyaulax catenella is
similar to that observed for other dinoflagellates in culture, showing
photoperiod-entrained rhythms of luminescence and stimulability
with relatively constant luminescent capacity during scotophase. G.
catenella is very sensitive to stimulation and photoinbibition. The
nature of the response to stimulation by bubbling...
A well-defined, quantitative model for determining soil contrast
was developed to improve soil survey interpretations concerning the
effects of mixtures of different kinds of soils on agricultural land
use. The model was evaluated by determining the levels and reasons
for soil contrast on mapped soil areas representing 5 different
landscapes,...
Natural populations of phytoplankton from Yaquina Bay, Oregon,
were incubated in large polyethelene bags in- situ, with and without
the natural assemblage of zooplankton. Samples were taken daily for
two weeks in April, 1974. The biomass of phytoplankton in the bag
without grazers reached values two to three times the...
A detailed study of iron concentrations measured by the reducible,
reactive ferrous, and extractable methods was conducted in Auke Bay,
Alaska during June 1973 and in Hood Canal, Washington during October
1973 and April 1974. The concentrations by each method were generally
highest at the bottom and decreased towards the...
This study was undertaken to determine both the amount and the
spatial variability of sand, silt, clay, and six fractions of coarse
fragments in soils representing harsh sites for reforestation. Particle size data were collected because of their direct relationship to
water holding capacity and the plantability and survivability of...
During the six-month period of July through December, 1966,
a study of animals inhabiting laminarian holdfasts in Yaquina Bay,
Oregon, was carried out to determine what animals live in this habitat
and to gain some idea of the factors which influence their presence
and distribution. This study deals with yet...
To provide further information on the occurrence and geographical
variations of bioluminescent capabilities of marine dinoflagellates,
forty species, representing twelve genera, of dinoflagellates
from Yaquina Bay, Oregon, were examined for bioluminescence as
single cell isolates. Seventeen species from the genera Ceratium
(1 sp.), Gonyaulax (3 sp.), and Peridinium (13 sp.)...
The purposes of this investigation were to measure the relative
levels of enzymatic and respiratory metabolism of some vertically
migrating mesopelagic fishes collected from the ocean waters off
Oregon and to modify and adapt an enzyme method for use as a measure
of metabolic activity at sea with a minimum...
Batch cultures of Skeletonema costatum were grown under continual
light saturation, with nitrogen nutrients in limiting concentrations.
Population parameters measured included ¹⁴C uptake,
chlorophyll a, particulate carbon and nitrogen, and ammonia, nitrate,
and nitrite, concentrations.
A method was developed for measuring cellular nutrient reservoirs
in laboratory cultures of marine phytoplankton....
Physical sources of nutrient nitrogen for the Auke Bay, Alaska
estuarine ecosystem were investigated. These sources included
vertical dispersion, advection, and fresh water sources. Hydrographic
circulation patterns for the bay, and a nutrient budget for
the surface mixed layer were developed.
Measurements of temperature, salinity, currents, wind
velocity, rainfall and...
The capacity expansion investment decisions on the provision
of municipal sewerage are the central aspects of this analysis.
The purpose is to present a methodology, utilizing a dynamic demand
and supply model of sewerage, for recommending a set of values for
the investment and pricing decision variables. The outcome of...
A model was developed that allows potential users to identify
the agricultural suitability of parcels of land in western Oregon.
Literature was reviewed regarding five possible benefits to be
derived from public policies designed to preserve productive agricultural
land. They are (1) the provision of sufficient cropland
to supply the...
Wetlands are widely identified as providing important and fundamental processes valuable for maintaining ecosystem health and diversity. Located in the southern Willamette Valley, the Mt. Pisgah Arboretum contains some valuable remaining wetland habitat along the Coast Fork of the Willamette River. One goal of the Mt. Pisgah Arboretum is "to...
Hydric soils are defined through the hydric soil definition, and a means to identify hydric soils has been established through hydric soil criteria and Field Indicators of Hydric Soils in the U.S. However, the field indicators are a recent development that requires more research and testing to increase our knowledge...
Investigation was made into the influence of changing light
intensity on the organic and elemental composition of two species of
marine diatoms, Ditylum brightwellii and Skeletonema costatum.
Analysis was made of the relative changes in soluble and insoluble
carbohydrate; polar, non-polar, and total lipid; amino acids; proteins;
and total carbon,...
The Reclamation Act of 1902, as amended, is the basic
legislation governing the distribution of water from federal
projects for irrigation purposes. In the three-quarters
of a century since the passage of this Act, technological,
economic, and legal developments have forced a reappraisal
of the original intent of the Reclamation...
Public policy structured to treat "market failures" related to
land use (through restructuring property rights) must be evaluated in
terms of its potential impacts not only upon social efficiency, but also
upon the distributions of wealth and income associated with real
estate ownership. Analyses of basic relationships between forms of...
Observations were made of salinity, temperature, nitrate +
nitrite, phosphate, silicate, total available nitrogen, and chlorophyll
a in nine areas of the Alaskan Inside Passage during April of 1971.
In general all properties indicated the water to be well mixed throughout
this area. The conservative properties were particularly uniform.
The...
Two types of temporary poois, known as playas, occur in semiarid southeast Oregon. Vegetated upland playas are found in the High Lava Plain province; barren alkaline-saline playas are found in the Basin and Range province. Both types become ponded in most years, but they often lack redoximorphic features indicative of...
An important segment of outdoor recreational activity in
eastern Oregon is based on the harvest of deer. The deer population
can be altered in two ways. Rangeland, which provides feed and
cover for deer, can be improved through public or private investments
or hunting regulations can be changed. This study...
The effects of aspect, canopy, elevation, and season both singly
and in combination on soil temperatures at 50 cm depths were
evaluated.
The objectives of the study were (i) to develop a standard procedure
for obtaining soil temperature data adequate to classify soils
at the family and great group levels,...
The purpose of the study was to determine the current status
of provisions being made to provide for appropriate utilization of
the increasing quantities of audiovisual equipment and materials
available in the public schools of Oregon. The ultimate objective of
the study was to identify activities and programs essential to...
The effects of burial by tephra (volcanic aerial ejecta) on
forest understory plants were examined northeast of Mount St. Helens,
Washington, in the area where the 18 May 1980 eruption deposited
tephra but did not destroy canopy trees. At six sites along a tephra
depth gradient from 2-15 cm, understory...
Purpose of the Study
The purposes of this study were to (1) identify the educational
and socioeconomic characteristics of Latin American students who
have graduated from the California State College system, (2) to identify
those characteristics which significantly affect academic success,
utilization of training and return home to Latin America...
The purpose of this study was to statistically evaluate one kind
of new elementary science curriculum materials. The materials;
(1) are written at five reading levels to partially meet the reading
ability spread found in the intermediate grades, (2) provide ways to
stimulate class discussion, and (3) provide three levels...
This study was an empirical investigation of two methods of
college classroom teaching--lecture and discussion. The design was
both experimental and descriptive, differing from prior methodological
comparisons in that a more sophisticated test statistic was used in
the analysis of the data. Whereas most similar studies used t tests,
or...
The ectomycorrhizal fungi Cenococcum geophilum, Hebeloma
crustuliniforme and Laccaria laccata produced ethylene in vitro in
modified Melin-Norkrans liquid medium only if amended with 2.5 to
10 mM methionine; Pisolithus tinctorius failed to produce ethylene
unless the cultures were renewed with fresh methionine-amended
medium prior to ethylene assay. An additional 19...
A primary objective of the management practices of the Oregon
State Game Commission is to maximize and sustain the annual harvest
of salmon and steelhead by sportsmen fishing in Oregon. Assessment
of these practices is dependent upon an accurate determination of total
annual sports harvest throughout the state.
Present total...
Plant tissues contain a wide variety of phenolic compounds,
frequently in high concentration. Both non-covalent association of
intact and oxidized phenols and covalent linkage of oxidized phenols
to protein occur. Such interactions can have important biochemical
and nutritional significance.
A model system approach was used to identify and quantitate
amino...
Chromium spills on soils are causing severe groundwater contamination
problems. To increase the performance of cleanup methods, the chemical behavior
of chromium in soils and its transport through soils have to be understood. The
objectives of this research were to investigate the sorption characteristics of
chromium(VI) in soil and to...
Partial reactions of photosynthesis were examined in the wild
type strain and six photosynthetic mutants (8, 11, 26, 40, 50, a') of
Scenedesmus obliquus, strain D₃. A reproducible procedure for the
isolation of active chloroplast fragments from Scenedesmus was
developed. Several chloroplast reactions were examined, as well
as two in...
Understanding how populations within a species interact across various geographic and temporal scales is fundamental to developing appropriate conservation strategies. I examined the geographic variation in genetic and meristic characters of coastal cutthroat trout (Oncorhynchus clarki clarki) based on
approximately 1,400 fish sampled from 54 populations spanning their distributional range...