This qualitative study examined organizational change including the necessary steps that a large school district took in planning and implementing a reform effort. This project told a story of one school district's experience. The study covered a five year period from 1990 to 1995 in the 30,000 student Salem-Keizer School District of Salem, Oregon. The examination included a description of school board action in 1989 where a staff recommendation to reform middle schools and move sixth graders to middle schools with a seven-eight grade configuration was denied. The study then continued with an examination of the change process during which sixth graders were moved to middle schools, reforms were implemented, three new schools were opened and five schools were remodeled to accommodate the new programs. This reform, however, was not without problems. Those issues were discussed in the study. The retrospective part of the study reflected upon the project through the analysis of district documents and the results of nine field interviews of middle school principals using a set of seven questions designed to reveal the principals' perceptions of the process. The study then triangulated the results of the interviews by examining information from a focus group comprised of Salem-Keizer curriculum directors and staff development specialists who were asked the same seven questions. The study answered the questions: "Did the district do what the community asked it to do in creating middle schools that afford students a more effective educational program?" and "What are the implications for the district in undertaking a major reform effort?" Themes that emerged from the study included the following: organizational change is highly personalized; change should have a literature and research foundation; stakeholders must participate in the change process; communication must be consistent and must be "two way"; one person must be the individual in charge of the change; a change process requires vigilance, constant reevaluation and refinement; staff development is crucial in a change process; and if a district wants new thinking, then new people must help in organization change. / Graduation date: 1997

Graduation date: 1996

Redband trout density was examined in three forested streams in central Oregon at two scales, pool channel unit and microhabitat. Two streams were in roadless areas and one was in a "highly managed" watershed. At the larger spatial scale, trout displayed a seasonal shift in habitat use from early to late summer. There was a positive correlation between trout density and pool structural complexity during summer base flow. The association was intensified throughout the summer as stream flow continued to drop. The structural complexity of each pool was quantified using an index integrating structural variability and depth. Twenty-two pools were divided into microhabitats, or pool subunits with similar characteristics using a qualitative classification scheme describing different structural elements comprising the pool habitat. Microhabitat was partitioned between fry and older trout throughout the summer: Fry generally used stream margins, backwaters, and shallow areas; whereas, trout one year and older used deep areas (depth greater that 0.5 m) and cover associated with substrate and wood. The use of cover by trout one year and older doubled from June to August. This change in use was coupled with the increased association with structural complexity at the channel unit scale. The large substrate and wood that provided cover also increased the structural complexity of the pool. As trout increased their use of cover, their densities increased in more complex pools. Man-made log weir pools in a simplified stream were evaluated for their structural complexity and compared to the shallow natural pools in the same reach. Log weir pools had greater average depth, but were less complex than natural pools, and could maintain a similar density of trout. The structural complexity in natural pools appears to compensate for their shallow depth. Log weir pools enhanced with placement of a rootwad supported higher densities of trout. Addition of a rootwad provided microhabitats associated with cover that were lacking in weir pools without other structures added. When using instream construction to create pool habitat, complex structure that provides microhabitats associated with cover is more effective at holding higher densities of fish under late summer low flow conditions. / Graduation date: 1996

The purpose of this study was to develop and test a data collection instrument that would facilitate description of the clothing of Oregon school boys 1867-1910. In addition, the researcher attempted to describe Oregon school-aged boys' clothing and determine if fashion changes occurred in Oregon boys' clothing. The researcher also determined if there were differences in the clothing of boys from rural and urban areas. The data collection instrument was developed by examining literature on children's clothing, photographs, and magazine and catalogue illustrations. In an attempt to capture dress characteristic of everyday wear, the data source for the study consisted of documented class portrait photographs from the collections of the Oregon and Benton County Historical Associations. The instrument provided for a systematic method of data collection according to the principles of content analysis. The instrument consisted of garment categories and design detail options. A handbook of illustrations and terms accompanied the instrument to ensure consistency and reliability. A total of 503 records were collected over a period of four months. After data collection, the original instrument was revised for future use. Some detail options were added and some deleted. A footwear category was incorporated into the revised instrument after it was determined that it would be possible to gather information about footwear from group photographs. Information gathered on boys' clothing from the school photographs both agreed and deviated from the literature. The basic garments were similar; however, the fancier styles in the literature were not found in the quantities that the researcher anticipated and the literature indicated. Some garments, design details, and silhouettes changed over time. The presence of the actual garments did not vary, but some details such as lapel width, single or double breasted, and jacket style did, as well as how the garments were worn (i.e., buttoned, unbuttoned). Rural and urban differences occurred and were most pronounced in the quantity of garments worn (more urban boys wore suit jackets, waistcoats, ties, and hats than did rural boys) and how the garments were worn. The entire neck tie category was very different between rural and urban records. / Graduation date: 1996

I examined the biomechanical factors that influence the sizes of intertidal macroalgae by studying a population of Fucus gardneri at Fogarty Creek Point, OR. I constructed a mathematical model to predict optimal sizes and probabilities of survival for Fucus under conditions of high and low wave exposure. Predicted optimal sizes of Fucus closely matched the mean observed sizes of plants collected from wave-exposed and protected locations. To test this hypothesis in the field, I reciprocally transplanted Fucus between wave-exposed and wave-protected sites and found that the degree of wave exposure did not affect survival, but did influence size. Large Fucus were tattered by waves at exposed sites, and small Fucus grew at protected sites. These results support the hypothesis that wave forces can set mechanical limits to size in Fucus. I experimentally examined the relative influences of wave-induced disturbance, competition and predation on the sea palm, Postelsia palmaeformis and its understory community at a wave-exposed site at Depoe Bay, OR. Postelsia recruitment was affected by seasonal variations in disturbance and was greatest in areas disturbed in winter. Postelsia were most abundant at mid-zone, wave-exposed sites, and their restriction to wave-exposed sites seems to be due both to; 1) the occurrence of predictable winter disturbances at these sites which remove mussels, thereby stimulating sea palm growth from the underlying rock, and 2) high water motion which enhances sea palm growth by increasing nutrient exchange and photosynthesis and preventing desiccation at low tide. Competition, disturbance and grazing were all important factors in structuring the Postelsia understory community. Postelsia were dominant competitors and their holdfasts overgrew low-lying plants which were torn loose with Postelsia when this kelp was dislodged by winter storm surf. In the absence of this predictable, seasonal disturbance, competitive understory species, such as Corallina dominated primary space. Intermediate levels of disturbance allowed for the highest understory species diversity. Limpets played a keystone role by grazing Postelsia, the competitive dominant during most of the year, and maintained high levels of species diversity in the algal understory. / Graduation date: 1995

Dry land agriculture using summer fallow is a common crop production practice in the Columbia Plateau region of eastern Oregon. Farmed-over level terraces are used to control surface water runoff and soil erosion. More than 70 percent of the average annual precipitation around Pendleton, Oregon (350 - 400 mm) falls as low intensity, long duration rainfall from September to March. Wetter soil zones typically occur above and below the terrace. These areas have a higher potential for crop production as well as for movement of chemicals to ground water and to surface water where seepage occurs. The extra nitrogen or water that could accumulate in these areas needs to be considered in managing these areas. The first objective of this study was to measure the distribution of nitrate nitrogen (NO���-N) and water in relation to farmed-over level terraces, and infer potential solute flow patterns from changes in the measured distributions over time. The second objective was to make recommendations regarding management practices required for specific field locations to maximize crop production and minimize negative impacts on groundwater quality. Results indicate NO������ concentrations following harvest were < 4 mg kg����� of soil. Equivalent to soil solution concentrations between 27 and 20 mg L����� at 15 and 20 percent volumetric water content, respectively. Limited deep percolation of NO������ occurred below the root zone between harvest and planting. The NO������ concentrations below the root zone were < 1 to 15 mg kg����� following the summer fallow period. In August 1993, evidence exists that shows N applied fertilizer moved out of the surface 0.3 m and deeper into the profile. The redistribution of NO������ in the terrace channels of transects 1 and 2 strongly support this. Soil profiles that contain high residual concentrations of NO���-N during the fallow period increase the potential for NO���-N leaching below the root zone. Unusually heavy precipitation during normally dry periods or above normal winter precipitation increases the potential for NO���-N leaching below the root zone. / Graduation date: 1995

The purpose of this study was to investigate the relationship of family size, birth order, socioeconomic status, and parent-child relationships to young children's intellectual development. Seventy-four children, 39 boys and 35 girls, with a mean age of 4 years-8 months, and their parents (mothers and fathers), selected from 9 preschool programs and daycare centers in Corvallis, Oregon, acted as subjects for this study. Ninety-five percent of the families came from upper or upper-middle socioeconomic classes. All the families were intact, consisting of children and their biological parents, representing one-, two, and three-child families. The children in this study were either first-, second- or third-born children. Family socioeconomic status was determined via Hollingshead's Four Factor Index of Social Status. Information on family size and birth order was obtained through a Demographic Questionnaire. Parent-child relationship was assessed via the Parent Attitude Research Instrument-Short Form. Children's intellectual level was measured with the Peabody Picture Vocabulary Test-Revised. Zajonc and Markus' Confluence Theory, Page and Grandon's Admixture Theory, and Falbo and Polies Parent-Child Relationships Theory were utilized as the basis for investigating the relative contributions of family size, birth order, socioeconomic status, mother-child relationship, and father-child relationship to children's intellectual development. The regression procedure was used in data analyses. The .05 probability level was used as the criterion for statistical significance. Findings revealed that the variables of socioeconomic status and quality of father-child relationships contributed significantly to children's intellectual development. The higher the socioeconomic status of the family, and the more supportive the father-child relationships, the higher the children's intellectual development scores. Birth order and family size made no contributions to children's intellectual development. These findings, therefore, provided support for Page and Grandon's Admixture Theory and Falbo and Polies Parent-Child Relationships Theory, but not for Zajonc and Markus' Confluence Theory. / Graduation date: 1995

The seasonal life history of the cereal stem moth (CSM), Ochsenheimeria vacculella Fischer von Roslerstamm, (Lepidoptera : Ochsenheimeriidae) was investigated in a commercial field of annual ryegrass in the Willamette Valley, OR from January 1993 to August 1994. Phenology of life stages, effect of temperature on eclosion, and development of larvae on potential hosts of economic importantce were also studied. First records of parasitization and effects of cultural practices on this potential pest in annual ryegrass were reported. CSM is a recent introduction to North America from a monobasic family of the Palearctic region. Its life cycle is functionally univoltine in commercial ryegrass seed fields. Eggs are characteristically deposited on interior wooden walls, ceilings and straw bales or piles in outbuildings from June through September. Eclosion occurs bimodally with approximately fifty percent of current season eggs hatching in late June and July. The remainder overwinter and hatch in February and March. Larvae ballooned from oviposition sites to potential hosts and were found in annual ryegrass from February to early June. First instar larvae typically mine leaves; later stadia are stem borers. Variance to mean ratios of larvae sampled in annual ryegrass described a clumped population. Pupation occurred from late May to early July. The pupa was enclosed in a flimsy cocoon usually located on the inside of a flag leaf's sheath. Shortly after emergence in early June and July, adults fly to outbuildings preferentially remaining within those where grass straw has been stored. Migration from the field and subsequent flight, copulation and oviposition within buildings occurred only on bright days from approximately noon to 4:30 pm (PDT) through September at which time most adults have died. Two species of larval parasitoids in the Eulophidae and Ichneumonidae were very abundant in the annual ryegrass field under study during June and July 1994. Their combined parasitization rate of CSM larvae exceeded ninety percent. A frequency distribution of head capsule widths indicates CSM larvae probably develop through five instars. However, inter-instar ratios of head capsule widths did not conform to Dyar's hypothesis. Eggs deposited by females collected in the field and allowed to oviposit in the laboratory did not hatch at either room temperature or 6��C. However, cohorts of eggs hatched readily during incubation at either 10�� or 14��C when observed after two and three months exposure. Nine varieties of six commercially important species of grasses and cereals were evaluated for suitability as larval hosts. Annual ryegrass, Lolium multiflorum Lam., consistently supported the greatest population densities in the field and resulted in greatest survival of larvae in laboratory and greenhouse tests. Removal of annual ryegrass foliage in plots during late winter or early spring to simulate the effect of sheep grazing significantly reduced subsequent larval populations relative to plots without vegetation removal. / Graduation date: 1995

The Mark 0. Hatfield Marine Science Center (HMSC) public education opportunities include interpretive programs offered along the Estuary Nature Trail. The purpose of this study was to determine the effectiveness of three informal education programs, interpretive signs, a self-guided trail brochure, and guided naturalist walks, in imparting information on the ecology of estuaries to visitors. A second objective was to determine visitors attitudes towards estuarine and wetland conservation issues. A questionnaire including knowledge and attitude statements and demographics was distributed to 901 participants. Results show that the three programs are effective in teaching visitors about estuarine ecology, with the naturalist walks being the most effective. Knowledge of estuarine ecology and attitudes towards estuarine and wetland conservation issues were associated with visitor characteristics such as level of education, membership in a conservation organization, residence proximity to wetlands, awareness of local wetland controversies, and previous visits to an estuary trail. Observations of visitor behavior along the estuary trail showed that visitor groups spent an average of 16 minutes on the trail. At each interpretive sign between 54 and 77% of the visitors were observed reading the information; those reading times ranged from 16 to 33 seconds per sign. / Graduation date: 1994

Pendent Usnea species were collected in western Oregon and examined. Character states, such as cortex-medulla-axis ratio; fibril length; papilla diameter; branching patterns; and presence or absence of fibrils, papillae, soredia, isidia; plus chemistry, were recorded and analyzed by inspection for differences. Historical names were researched in the literature. A comparison was made between species concepts used in these accounts, with many conflicting concepts encountered. Selected morphological characters were examined by scanning electron microscope, or dissecting microscope, described, and illustrated. The characters reviewed included articulate fissures; isidia and soredia; cortex-medulla-axis ratio; papillae; and foveate pits. Species determinations were made for field collections. Names were found for all specimens inspected without introducing new names at this time. Eight pendent species were found in western Oregon; they are Usnea cavernosa, Usnea ceratina, Usnea fillpendula, Usnea hesperina subsp. liturata, Usnea inflata, Usnea leucosticta, Usnea longissima, and Usnea merrillii. A practical key to taxa with descriptions is provided and geographic distributions are recorded in tables and maps. / Graduation date: 1995