Despite the importance of plant-pollinator interactions for ecological communities, few long-term observational studies have been conducted of plant-pollinator networks. Using four years of plant-pollinator interaction data from 18 meadows in the Willamette National Forest, Oregon, this thesis examined how meadow size, the amount of nearby meadow habitat, weather, degree days,...
Almond growth has recently been initiated in Mexico in the effort to realize commercial production. This research paper is an evaluation of the physical environment conditions which favor almond production and an attempt to apply them to Mexico. It is shown that areas in the Northwest and Central Plateau are...
The physical characteristics and spatial location of
land are hypothesized to be significant inputs to its
valuation. This research evaluates the influence of
locational, economic, and physical site variables on the
assessed value of real property.
Evaluation of such influences is based on a stratified
systematic sample of land parcels...
The proposed widening of State Street between Lancaster
Avenue and 25th Street in Salem, Oregon was evaluated regarding potential
construction impacts on the biotic resources (vegetation, fish,
wildlife, and wetlands) in the immediate area. The existing setting
was surveyed to establish a base level from which to measure changes,
arid...
The concept of ecosystem services broadens perspectives on nature to include not only intrinsic value but also the utilitarian value it provides to society. Viewing nature through this lens informs our understanding of how particular ecological processes benefit different actors. In this research, I examine how water utilities in the...
This study investigated the private costs to individual households
of large-lot zoning policies. The study asked whether typical
zoning ordinances create shortages of small lots or small structures
and, if so, what the magnitude of the resultant welfare loss is.
The hypotheses were suggested by a theoretical model developed
to...
According to USDA research, Oregon in 2002 had the highest rate of hunger and one of the highest rates of food insecurity in the United States. Although the margin of error involved with these statistics indicates that the state may not actually be at the top of the list, a...
Deforestation and accompanying environmental deterioration is a threat to the economic growth and to the survival of the Himalayan kingdom of Nepal . There is need for a comprehensive forest rehabilitation program tailored to the different conditions of the Terai plain, Middle Hills and the Highland Himalaya regions of the...
An index suitable for measurement of the
diversity of agricultural land use is developed. This
index is based on a principle of measuring the deviation
of a distribution from an even distribution and is similar
to indexes employed to measure diversity in manufacturing
The index is applied to the thirty-six...
An attempt is made to determine whether
or not property value appreciation on land adjacent to an
expanding urban center is related to distance from the
city and to identify the temporal variation in this relationship.
The results of simple linear regression strongly
suggest that property value appreciation and distance...