Landscape heterogeneity is thought to differ among farm management types (i.e. organic and conventional), and this difference is hypothesized to result in variations in pest control by natural enemies. However, it is unclear if these variations in pest control are driven by landscape structure or by farm management practices themselves. Remotely sensed datasets were used to describe the landscape structure surrounding a group of organic and conventional caneberry farms in Oregon and Washington that have different leafroller parasitism rates attributed to farm management type. A finer scale survey was done at one of the farms using the remotely sensed data as well as field surveys. Landscape metrics of diversity, richness and percent non-crop were used to describe the landscapes surrounding the farm fields at scales ranging from 0.05 km to 5.00 km for the large scale study, and 0.05 km to 0.20 km for the fine scale study. In the fine scale study, data on parasitoid species assemblages, diversity, and parasitism rate were collected and analyzed against the calculated landscape metrics spatially and seasonally. The purpose of this study was to quantify effects of farm management type on habitat structure, effect of habitat structure on leafroller parasitism rate, and to access correlations between landscape metrics calculated at the landscape and field scale. Overall, the farms were embedded in a landscape that was broadly similar, with very few differences in landscape structure occurring between organic and conventional farms. Organic farms had higher vegetation height class diversity at the largest scale compared to conventional farms, while conventional farms had significantly higher percent non-crop area compared to organic farms. There was no significant effect of any of the calculated landscape metrics on parasitism rates. In the field scale study, no correlations were found between habitat metrics and parasitism rates, or between field based metrics and those calculated at the landscape scale. The results of this study suggest that conventional and organic caneberry farms in the Willamette Valley are broadly similar in the habitat conditions they provide parasitoids. This suggests that management changes to pesticide use alone could increase levels of leafroller biological control on conventional farms to levels that are comparable to those seen on organic farms. Our comparisons of the landscape scale and field scale landscape metrics showed no connection, this suggests that direct comparisons cannot be made with these particular metrics at these very different scales. Rather than comparing these types of data, it may be more useful to combine them in order to increase the resolution and predictive power of remotely sensed data for describing landscapes at broad scales. / Graduation date: 2013

On March 10, 1957, the United States Army Corps of Engineers completed The Dalles Dam and inundated Celilo Falls, the oldest continuously inhabited site in North America and a cultural and economic hub for Indigenous people. In the negotiation of treaties between the United States, nearly one hundred years earlier, Indigenous leaders reserved access to Columbia River fishing sites as they ceded territory and retained smaller reservations. In the years before the dam's completion, leaders, many of who were the descendants of earlier treaty signatories, attempted to stop the dam and protect both fishing sites from the encroachment of state and federal regulations and archaeological sites from destruction. This study traces the work of Wilson Charley, a Native fisherman, a member of the Yakama Nation's Tribal Council, and great-grandson of one of the 1855 treaty signatories. More broadly, this study places Indigenous actors on a twentieth-century Columbia River while demonstrating that they played active roles in the protest and management of areas affected by The Dalles Dam. Using previously untapped archival sources--a substantial cache of letters--my analysis illustrates that Charley articulated multiple strategies to fight The Dalles Dam and regulations to curtail Native's treaty fishing rights. Aiming to protect the 1855 treaty and stop The Dalles Dam, Charley created Native-centered regulatory agencies. He worked directly with politicians and supported political candidates, like Richard Neuberger, that favored Native concerns. He attempted to build partnerships with archaeologists and landscape preservationists concerned about losing the area's rich cultural sites. Even after the dam's completion, he conceptualized multiple tribal economic development plans that would allow for Natives' cultural and economic survival. Given the national rise of technological optimism and the willingness for the federal government to terminate its relationship with federally recognized tribes, Charley realized that taking the 1855 treaty to court was too risky for the political climate of the 1950s. Instead, he framed his strategies in the language of twentieth-century conservation, specifically to garner support from a national audience of non-natives interested in protecting landscapes from industrial development. While many of these non-native partners ultimately failed him, his strategies are noteworthy for three reasons. First, he cast the fight to uphold Native treaty rights in terms that were relevant to non-natives, demonstrating his complex understanding of the times in which he lived. Second, his strategies continued an ongoing struggle for Natives to fish at their treaty-protected sites, thereby documenting an overlooked period between the fishing rights cases of the turn of the twentieth century and the 1960s and 1970s. Charley left a lasting legacy that scholars have not recognized because many of his visionary ideas came to fruition decades later. Finally, my analysis of Charley's letters also documents personal details that afford readers the unique perspective of one Indigenous person navigated through a tumultuous period in the Pacific Northwest and Native American history.

Comprehension of eruptive histories is critical in understanding the evolution of magmatic systems at arc volcanoes and may supply evidence to the petrogenesis of intermediate and evolved magmas. Within the 300 ka eruptive history of Mount St. Helens, Washington, the Kalama Eruptive Period, 1479- ~1750 CE was bracketed by interludes of quiescence (Hoblitt et al., 1980) and thus likely represents an entire eruptive cycle within a span of 300 years. Study of the magmatic evolution during this short time period provides key information regarding inputs and the plumbing system of Mount St. Helens. This research aims to enhance comprehension of processes leading to the petrogenesis of intermediate magmas by providing whole rock and phase geochemical data of an eruptive cycle, thereby providing constraints on the magmatic evolution of the Kalama Eruptive Period. The eruptive sequence is divided into early, middle and late subperiods. The early Kalama began with two dacitic plinian eruptions and continued with smaller eruptions of dacite domes (64.4-66.5 wt% SiO₂) that included quenched mafic inclusions (53.7-57.7 wt% SiO₂). The middle Kalama signified the onset of basaltic andesite and andesite eruptions ranging between 55.5-58.5 wt % SiO₂. Subsequently, summit domes that began as felsic andesite (61-62.5 wt% SiO₂) and transitioned to dacite (62.5-64.6 wt% SiO₂) dominated the late Kalama. Previous work on Kalama-aged rocks suggests magma mixing is an integral process in their production. Compositions and textures of crystal phases, in addition to the presence of xenocrysts in middle and late Kalama rocks, confirm mechanical mixing of magmas likely produced many of the sampled compositions. New petrographic observations were integrated with new whole rock and phase EMP and LA-ICP-MS data and the known stratigraphy in order to constrain the magmatic and crustal components active during the Kalama Eruptive Period. New findings include: 1. Two populations of quenched mafic inclusions, one olivine-rich and one olivine-poor, are identified from the early Kalama based on mineralogy, textures, and major and trace element chemistry. Major element modeling shows crustal anatexis of plutonic inclusions found in early Kalama dacites could produce the felsic magma source of the olivine-poor population. The olivine-rich population incorporated cumulate material. 2. Four distinct lava populations erupted during the early part of the middle Kalama (X lavas), including two found exclusively in lahar deposits: M-type lahars are the most mafic, B-type lahars are more mixed, the Two Finger Flow was previously grouped with other middle Kalama-age lavas, and the X lava (in situ) has unique geochemical and textural character. X tephras likely correlate with the lavas. 3. There were at least three mafic source contributions at Mount St. Helens during the eruptive period: the parent to the X deposits, the cumulate material in the olivine-rich QMIs, and the calc-alkaline parent to the MKLV and SDO. The magma reservoir at Mount St. Helens has been modeled as a single, elongate chamber (Pallister et al., 1992). Multiple coeval basaltic or basaltic andesite parents fluxing into the magmatic system beneath the volcano could indicate a more complex magma chamber structure. / Graduation date: 2011

Understanding sandbar dynamics and variability is integral to developing a predictive capacity for nearshore flows, sediment transport, morphological change, and ultimately for determining coastline exposure to damaging storm waves. Along the high-energy U.S. Pacific Northwest (PNW) coast, sandbars typically dominate the bathymetry of the active zone. Here we report on a nearshore bathymetric data set that covers an exceptionally long stretch of coast and crosses several littoral cell boundaries. Our study area stretches from Point Grenville, Washington to Cascade Head, Oregon, including 8 littoral cells and approximately 250 km in the alongshore. We describe and quantify the morphological variability of sandbars in the PNW over large spatial scales as well as attempt to explain the inter-littoral cell variability via trends and variability in environmental parameters. From 560 bathymetric profiles (~1000 km of measurements) we have extracted over 500 distinct subtidal sandbars. The bar zone extends to over 1km from the shoreline in the northern part of the study area, but only to about 600m in the southern part. Maximum bar crest depths are typically 7m below MLLW. Bar heights range from a step in the cross-shore profile to over 3m from crest to trough. The northernmost littoral cells typically have two or more bars per cross-shore profile whereas the littoral cells in the southern part of our study area have only one bar. The mean depths of the bars, however, are much more consistent across littoral cells. The mean depths remain consistent even while the upper shoreface slope significantly increases from north to south, requiring that the maximum bar distance from the shoreline decreases from north to south. This regional gradient in upper shoreface slope is likely a response, at least in part, to a general coarsening trend in the sediment from north to south and hence linked to variations in regional geology. / Graduation date: 2013

This thesis examines broadcast policies and policy documents in Canada and the United States to determine whether and to what degree they make provision for the public's access to television. Government policies and policy documents are examined at the federal and local level, and a case study of two cable systems, one in Vancouver, B.C. the other in Seattle, Washington, supplies empirical data to corroborate how policy provisions for public access to television are interpreted and implemented. A neo-Gramscian concept of ideological hegemony broadly frames this study of the impact of public policy, specifically broadcast policy, on social structure and behaviour. Because a very small portion of the general population have access to television production and programming, they dominate the television discourse. Research that documents television’s pervasive stereotypic and derogatory treatment of women and “racial"/ethnic "minorities" as well as its perceived effect of contributing to the social and economic subordination of these populations in North American society is used as a basis for this study. This thesis argues that broadening the body of people who have access to the television production and programming process might encourage more accurate, positive and/or relevant television images and relations with positive social consequences. On one level, this is a matter of having broadcast policies which ensure such broadened access. Canada and the United States each have policy provisions for the general public's access to television which are based on notions of civic democratic participation in society. Analysis and comparison of these policies results in the conclusion that although both countries provide access to the public through policy, many of these provisions limit access in four areas: access to production, access to distribution, access to input, and access to viewing. Because television access policies limit the public's access increasingly, the broadening of the access base is impeded along with the challenge to the current structure, message and function of television. On this account, traditional agendas and images continue to dominate the airwaves and their educational power. Further study should be undertaken on: 1) the effects of television, 2) the public's use of community television/public access television, 3) the effects of community channels on viewers and whether they are different than the effects of broadcast television and 4) the effects of broadcast policy on the structure and function of television.

Suburban centres policies in Greater Vancouver, metropolitan Melbourne, and Bellevue, Washington are examined to derive general lessons toward the improvement of this type of policy. It is found that two attempts to pursue the development of a regional system of suburban centres have been unsuccessful, while a municipally-based policy has achieved some success in terms of the physical design of a suburban downtown. Patterns of private sector development are found to have been very little affected by any of the case study policies. Further, several assumptions concerning the linkages between public transit and land use in suburban centres are found to require further careful examination before they should be used as a basis for future policy development.

This thesis examines broadcast policies and policy documents in Canada and the United States to determine whether and to what degree they make provision for the public's access to television. Government policies and policy documents are examined at the federal and local level, and a case study of two cable systems, one in Vancouver, B.C. the other in Seattle, Washington, supplies empirical data to corroborate how policy provisions for public access to television are interpreted and implemented. A neo-Gramscian concept of ideological hegemony broadly frames this study of the impact of public policy, specifically broadcast policy, on social structure and behaviour. Because a very small portion of the general population have access to television production and programming, they dominate the television discourse. Research that documents television’s pervasive stereotypic and derogatory treatment of women and “racial"/ethnic "minorities" as well as its perceived effect of contributing to the social and economic subordination of these populations in North American society is used as a basis for this study. This thesis argues that broadening the body of people who have access to the television production and programming process might encourage more accurate, positive and/or relevant television images and relations with positive social consequences. On one level, this is a matter of having broadcast policies which ensure such broadened access. Canada and the United States each have policy provisions for the general public's access to television which are based on notions of civic democratic participation in society. Analysis and comparison of these policies results in the conclusion that although both countries provide access to the public through policy, many of these provisions limit access in four areas: access to production, access to distribution, access to input, and access to viewing. Because television access policies limit the public's access increasingly, the broadening of the access base is impeded along with the challenge to the current structure, message and function of television. On this account, traditional agendas and images continue to dominate the airwaves and their educational power. Further study should be undertaken on: 1) the effects of television, 2) the public's use of community television/public access television, 3) the effects of community channels on viewers and whether they are different than the effects of broadcast television and 4) the effects of broadcast policy on the structure and function of television. / Education, Faculty of / Curriculum and Pedagogy (EDCP), Department of / Graduate

Suburban centres policies in Greater Vancouver, metropolitan Melbourne, and Bellevue, Washington are examined to derive general lessons toward the improvement of this type of policy. It is found that two attempts to pursue the development of a regional system of suburban centres have been unsuccessful, while a municipally-based policy has achieved some success in terms of the physical design of a suburban downtown. Patterns of private sector development are found to have been very little affected by any of the case study policies. Further, several assumptions concerning the linkages between public transit and land use in suburban centres are found to require further careful examination before they should be used as a basis for future policy development. / Applied Science, Faculty of / Community and Regional Planning (SCARP), School of / Graduate

In the mid-19th century, the Fort Vancouver employee Village was one of the most diverse settlements on the Pacific Coast. Trappers, tradesmen, and laborers from Europe, North America, and Hawaii worked and lived within a highly stratified colonial social structure. Their homes have been the site of archaeological research for nearly 50 years, but the architectural features and artifacts have received limited attention. Inspired by an 1845 description of the Village that described houses that were "as various in form" as their occupants (Hussey 1957:218), this study examined community-level social relationships in this 19th-century fur trade community through vernacular architecture and landscape. This thesis presents the life histories and layouts of five Village houses. The architectural analysis relied on data from features, square nails, window glass, and bricks. The resulting architectural interpretations were synthesized to explore the larger vernacular landscape of the Village and investigate whether the house styles reflect processes of creolization and community development, or distinction and segregation among the Village residents. The houses all stem from a common French-Canadian architectural tradition, built by the first employees at Fort Vancouver, but the life histories also revealed that the houses were occupied (and repaired) by a second wave of employees at some time during the 1840s. A reminder that Village houses deposits may reflect multiple owners, and should not be conceptualized as the result of a single household. Finally, this thesis demonstrates that nuanced architectural data that can yet be learned from past excavation assemblages when the many nails, bricks, and window glass specimens are reanalyzed using current methods.

It has been assumed that the considerable dispersal ability of many marine species would prevent genetic divergence in the absence of geographic isolation. However, recent work has shown that many marine species often develop differentiation among areas within their known dispersal range. This 'paradox' of marine divergence is particularly important among marine mammal species where behavior can restrict gene flow. To investigate genetic substructure within such a species, I used tissue samples collected from 63 stranded Pacific harbor seals (Phoca vitulina richardsi) in Washington and Oregon between 2006 and 2010 for population stock analysis. DNA was extracted from frozen tissues, and a 551 bp fragment of mtDNA control region sequence and eight microsatellite loci were amplified to investigate localized genetic structure. Minimum spanning network and haplotype frequency analyses of mtDNA sequences indicated that while haplotype lineages are not isolated within a sampling region, there is some evidence of regional differentiation. On the other hand, microsatellite data suggest a lack of substructure among the animals sampled, with only a weak signal of limited gene flow between Puget Sound and coastal areas. Biased dispersal among age classes was also suggested, with juveniles showing less differentiation among areas than adults. Regardless of the historical scenario which has led to this complex pattern of genetic structure in Pacific harbor seals across the Pacific Northwest, my results suggest higher levels of exchange among areas than previously suspected, and will have important consequences for future management considerations for these stocks.