Digital Commons Network^™

Improving The Representation Of Roots In Terrestrial Models, Erica A.H. Smithwick, Melissa S. Lucash, M. Luke Mccormack, Gajan Sivandran

Environmental Science and Management Faculty Publications and Presentations

Root biomass, root production and lifespan, and root-mycorrhizal interactions govern soil carbon fluxes and resource uptake and are critical components of terrestrial models. However, limitations in data and confusions over terminology, together with a strong dependence on a small set of conceptual frameworks, have limited the exploration of root function in terrestrial models. We review the key root processes of interest to both field ecologists and modelers including root classification, production, turnover, biomass, resource uptake, and depth distribution to ask (1) what are contemporary approaches for modeling roots in terrestrial models? and (2) can these approaches be improved via recent …

A Data Set Of Worldwide Glacier Length Fluctuations, Paul W. Leclercq, Johannes Oerlemans, Hassan J. Basagic, Christina Bushueva, A. J. Cook, Raymond Le Bris

Geology Faculty Publications and Presentations

Glacier fluctuations contribute to variations in sea level and historical glacier length fluctuations are natural indicators of past climate change. To study these subjects, longterm information of glacier change is needed. In this paper we present a data set of global long-term glacier length fluctuations. The data set is a compilation of available information on changes in glacier length worldwide, including both measured and reconstructed glacier length fluctuations. All 471 length series start before 1950 and cover at least four decades. The longest record starts in 1535, but the majority of time series start after 1850. The number of available …

Modeling Fecal Bacteria In Oregon Coastal Streams Using Spatially Explicit Watershed Characteristics, Paul Bryce Pettus

Dissertations and Theses

Pathogens, such as Escherichia coli and fecal coliforms, are causing the majority of water quality impairments in U.S., making up ~87% of this grouping's violations. Predicting and characterizing source, transport processes, and microbial survival rates is extremely challenging, due to the dynamic nature of each of these components. This research built upon current analytical methods that are used as exploratory tools to predict pathogen indicator counts across regional scales. Using a series of non-parametric methodologies, with spatially explicit predictors, 6657 samples from non-estuarine lotic streams were analyzed to make generalized predictions of regional water quality. 532 frequently sampled sites in …

Who Owns This Body? Enslaved Women's Claim On Themselves, Loucynda Elayne Sandeen

Dissertations and Theses

During the antebellum period of U.S. slavery (1830-1861), many people claimed ownership of the enslaved woman's body, both legally and figuratively. The assumption that they were merely property, however, belies the unstable, shifting truths about bodily ownership. This thesis inquires into the gendered specifics and ambiguities of the law, the body, and women under slavery. By examining the particular bodily regulation and exploitation of enslaved women, especially around their reproductive labor, I suggest that new operations of oppression and also of resistance come into focus.

The legal structure recognized enslaved women in the interest of owners, and this limitation was …

Scenario Development And Analysis Of Freshwater Ecosystem Services Under Land Cover And Climate Change In The Tualatin And Yamhill River Basins, Oregon, Robert Wesley Hoyer

Dissertations and Theses

Humans make decisions within ecosystems to enhance their well-being, but choices can lead to unintended consequences. The ecosystem services (ES) approach supports decision-making that considers all environmental goods and services. Many challenges remain in the implementation of the ES approach like how specific ES vary through space and time. We address this research problem using the Tualatin and Yamhill river basins in northwestern Oregon as a study area. Freshwater ES are quantified and mapped with the spatially-explicit ES modeling tool, Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST). In chapter II, we develop a simple urban land cover change modeling …

Identification And Characterization Of Fine Particulate Matter Hot Spots On An Urban Arterial Corridor Integrating Probe Vehicle, Traffic And Land Use Data, Katherine Eleanor Bell

Dissertations and Theses

The purpose of this study is to explore the use of integrated probe vehicle, traffic and land use data to identify and characterize fine particulate matter (PM[subscript 2.5]) hot spot locations on urban arterial corridors. In addition, a preliminary analysis is conducted to consider volatile organic compound (VOC) hot spot locations. A pollutant hot spot is defined as a location on a corridor in which the mean pollutant concentrations are consistently above the 85th percentile of pollutant concentrations when compared to all locations along the corridor. In order to collect data for this study, an electric vehicle was equipped with …

Every Town Is All The Same When You've Left Your Heart In The Portland Rain: Representations Of Portland Place And Local Identity In Portland Popular Lyrics, Meghan Andrea Kearney

Dissertations and Theses

This study looks at how place and local identity of Portland are described within music lyrics from Portland, Oregon popular indie-rock artists. Employing a constant comparative analysis on a set of 1,201 songs from 21 different popular Portland indie-rock artists, the themes of landscapes and climate were found to represent place, and themes of lifestyles and attitudes represented local identity. Reviewing the uncovered themes showed a strong connection between representations of place and local identity within lyrics and common stereotypes or understandings of the city of Portland and its indie-rock music scene. The results of this study illustrate how place …

Soil Development And Vegetation Response To Removal Of A Small Dam, Lassen Volcanic National Park, California, Stephanie Kay Rohdy

Dissertations and Theses

Dam removal is increasing as dams age, yet little is understood about the pedogenic response to dam removal. This study reports on the edaphic changes of reservoir sediments and vegetation cover one year following removal of a small earthen dam in Northern California. In August 2012, I sampled surface sediments from the former Dream Lake reservoir in Lassen Volcanic National Park, and compared their physical and chemical properties with soil samples from two reference sites. I also estimated percent cover of vegetation in the former reservoir and reference sites. My results show that the reservoir was under reduced conditions, as …

A Theory Of Travel Decision-Making With Applications For Modeling Active Travel Demand, Patrick Allen Singleton

Dissertations and Theses

The continuing evolution of urban travel patterns and changing policy goals and priorities requires that transportation researchers and practitioners improve their abilities to plan and forecast the demand for travel. Walking and bicycling - the primary forms of active travel - are generating increasing interest for their potential to reduce automobile use, save governmental and consumer costs, and improve personal and social health outcomes. Yet, current transportation planning tools, namely regional travel demand forecasting models, poorly represent these active travel modes, if at all.

More broadly, travel models do an incomplete job of representing the decision-making processes involved in travel …

Us Medical Specialty Global Health Training And The Global Burden Of Disease, Vanessa B. Kerry, Rochelle P. Walensky, Alexander C. Tsai, Regan W. Bergmark, Brian A. Bergmark, Chaturia Rouse, David R. Bangsberg

OHSU-PSU School of Public Health Faculty Publications and Presentations

Background: Rapid growth in global health activity among US medical specialty education programs has lead to heterogeneity in types of activities and global health training models. The breadth and scope of this activity is not well chronicled.

Methods: Using a standardized search protocol, we examined the characteristics of US medical residency global health programs by number of programs, clinical specialty, nature of activity (elective, research, extended curriculum based field training), and geographic location across seven different clinical medical residency education specialties. We tabulated programmatic activity by clinical discipline, region and country. We calculated the Spearman's rank correlation coefficient to estimate …

Skateboarding As Transportation: Findings From An Exploratory Study, Tessa Walker

Dissertations and Theses

In recent decades skateboarding has expanded from recreation into a form of transportation. Skateboarders appear to use roadways much as other non‐motorized modes do. However, there is little academic research on the needs and characteristics of the skateboard as a mode. This research reports demographics, multi‐modal and travel behavior findings, and other data from an exploratory mixed‐methods study of skateboarding as a mode of transportation.

Food Sovereignty: An Alternative Paradigm For Poverty Reduction And Biodiversity Conservation In Latin America, M. Jahi Chappell, Hannah Wittman, Christopher M. Bacon, Bruce G. Ferguson, Luis Garcia Barrios, Raúl Garcia Barrios, Daniel Jaffee, Jefferson Lima, V. Ernesto Méndez, Helda Morales, Lorena Soto-Pinto, John Vandermeer, Ivette Perfecto

Sociology Faculty Publications and Presentations

Strong feedback between global biodiversity loss and persistent, extreme rural poverty are major challenges in the face of concurrent food, energy, and environmental crises. This paper examines the role of industrial agricultural intensification and market integration as exogenous socio-ecological drivers of biodiversity loss and poverty traps in Latin America. We then analyze the potential of a food sovereignty framework, based on protecting the viability of a diverse agroecological matrix while supporting rural livelihoods and global food production. We review several successful examples of this approach, including ecological land reform in Brazil, agroforestry, milpa, and the uses of wild varieties in …

Gathering “Wild” Food In The City: Rethinking The Role Of Foraging In Urban Ecosystem Planning And Management, Rebecca J. Mclain, Patrick T. Hurley, Marla R. Emery, Melissa R. Poe

Institute for Sustainable Solutions Publications and Presentations

Recent “green” planning initiatives envision food production, including urban agriculture and livestock production, as desirable elements of sustainable cities. We use an integrated urban political ecology and human–plant geographies framework to explore how foraging for “wild” foods in cities, a subversive practice that challenges prevailing views about the roles of humans in urban green spaces, has potential to also support sustainability goals. Drawing on research from Baltimore, New York City, Philadelphia, and Seattle, we show that foraging is a vibrant and ongoing practice among diverse urban residents in the USA. At the same time, as reflected in regulations, planning practices, …

Research & Strategic Partnerships: Quarterly Review, Volume 1, Issue 1, Portland State University. Research & Strategic Partnerships

Portland State Research Magazine

Bridges are the connective tissue of Portland, spanning our rivers, streams, and valleys. Similarly, Portland State University’s many partnerships link our institution with those organizations that provide the economic and cultural lifeblood of our region. The Office of Research and Strategic Partnerships (RSP) oversees the largest of these, with the Oregon Health and Science University, Intel, the City of Portland, Portland General Electric, Portland Public Schools, and the Technology Association of Oregon, among many others.

In this, RSP’s first quarterly newsletter, we provide a snapshot of how PSU’s faculty and students are working with these partners to make and apply …

The Effects Of Large Wildfires On Employment And Wage Growth And Volatility In The Western United States, Max Nielsen-Pincus, Cassandra Moseley, Krista Gebert

Environmental Science and Management Faculty Publications and Presentations

We examined the effect of large wildfires on economic growth and volatility in the western United States. We matched wildfire data with quarterly employment and earnings growth data to assess the specific effect of wildfire on employment and wage growth in western US counties. Wildfires generally tended to exhibit positive effects on employment and wage growth in the quarter(s) during which suppression efforts were active. However, this effect transitioned to increased economic volatility following a wildfire. The effect of wildfire also varied by the type of county in which wildfire occurred. The amount of suppression costs invested locally had the …

Engaging Stakeholders In Ecosystem Service Assessment Under Climate Change And Urban Development Scenarios, Heejun Chang, David E. Ervin, Wes Hoyer, Mike Psaris, Ken Lyons, Emily D. Dietrich, Samantha Hamlin, John Lambrinos, Tammy Winfield, Bobby Cochran

Geography Faculty Publications and Presentations

This presentation focuses on how scientists can engage stakeholders in ecosystem service assessment.

Getting Salmon Back In Salmon Creek: Systematizing Comparative Water Quality Analysis For Targeted Restoration, Zbigniew J. Grabowski, Sarah Janjua, Michael Swamer, Heejun Chang, Eric Watson

Geography Faculty Publications and Presentations

This presentation focuses on water quality restoration efforts in Salmon Creek

Assessing Cultural Ecosystem Services Using Gis-Based Landscape Values Mapping. Case Study: Olympic Peninsula Human Ecology Mapping Project, Diane Besser, Rebecca J. Mclain, Lee Cerveny, David Banis

Institute for Sustainable Solutions Publications and Presentations

This presentation focuses on the Olympic Peninsula mapping project objectives:

• Develop and test a method for mapping sociocultural values at a Bioregional scale
• Test techniques for analyzing spatialized sociocultural values data
• Explore ways to integrate spatialized sociocultural values into forest management planning

E-Bikes In The United States, John Macarthur

PSU Transportation Seminars

Electric bicycles (e-bikes) are well established in China and other Asian and European countries but have yet to realize their potential in the United States, although recently the number of e-bikes has been growing. Research on the economic, operational, and safety issues of e-bikes in the U.S. is limited. This research aims in part to understand if different bicycling technology, in this case electric assist bicycles or e-bikes, can reduce barriers to bicycling and encourage more bike trips and longer bike trips, and increase the diversity of people bicycling, including people with a disability or chronic injury to bicycle. Some …

Using Indicators Projects As Prompts For Exploring Equity: A Case Study Of Greater Portland Pulse, Meg Merrick, Diane Besser, Shelia A. Martin

Institute of Metropolitan Studies Publications

This paper describes the process that the Greater Portland Pulse (GPP) initiated to incorporate the measurement of progress toward social equity into the project. While equity may appear to be a widely accepted priority for communities, the GPP process created a dialogue that was sometimes contentious but also profoundly educational for the participants revealing some of the complexities, not only of the issue of equity, but the challenges (particularly the inadequacy of available data) and trade-offs that are inescapable when using conventional data sets.

Additionally, this paper discusses some of the consequences of a process that, while incorporating equity values …

The Image-World: A Found Comic Poem, Franny Howes

Harlot: A Revealing Look at the Arts of Persuasion

The text of this comic is excerpted entirely from Susan Sontag's essay, "The Image World," from her 1977 book On Photography. I was assigned to read and respond to this piece when I attended the Adventure School for Ladies Comics Intensive, an alternative graduate program focused on gender, labor, and the comics industry.Sontag's essay critiques the way contemporary western culture uses photography for "imprisoning reality" and "depersonalizing our relation to the world." Photography creates another reality by the physical impression of light on film: what she calls the "image world." The idea of a separate and additive reality created through …

Disjointed Cosmopolitanism: Climate Change And Lived Experience In Portland, Oregon, Stephen Wayne Flinn

Dissertations and Theses

Climate change has emerged as one of the most significant issues facing the world. This research endeavored to uncover and describe the lived experience of Portland, Oregon residents in relation to the substantive issue of climate change. The specific purpose of this research was to gain a better understanding of the ways that Portland residents conceive of and communicate about climate change. Utilizing semi-structured phenomenological interviews, particular attention was paid to the culture of Portland residents, their lived experience and how the issue of climate change manifests itself in their everyday experiences. In addition, this particular phenomenological inquiry incorporated elements …

Effects Of Runoff Sensitivity And Catchment Characteristics On Regional Actual Evapotranspiration Trends In The Conterminous Us, Il-Won Jung, Heejun Chang, John Risley

Geography Faculty Publications and Presentations

An understanding of the role of hydro-climatic and geographic regimes on regional actual evapotranspiration (AET) change is essential to improving our knowledge on predicting water availability in a changing climate. This study investigates the relationship between AET change for a 60 year period (1951–2010) and the runoff sensitivity in 255 undisturbed catchments over the US. The runoff sensitivity to climate change is simply defined as the relative magnitude between runoff and precipitation changes with time. Runoff sensitivity can readily explain the conflicting directions of AET changes under similar precipitation change. Under increasing precipitation, AET decreases when runoff is increasing more …

Spatial Analysis Of Climate And Winegrape Production In Winegrape Growing Regions Of Oregon, United States Of America, Willow Devin Campbell

Dissertations and Theses

American Viticultural Areas (AVAs) are susceptible to small variations in climate and microclimates and are found within a narrow latitudinal range of prime climate conditions. These AVAs are geographically determined based on the best soil, climate, precipitation and temperature combinations for specific winegrape regions. As climate change continues to alter the local weather and the greater climate region of the Western United States, winegrape growing regions in Oregon are being affected. In an effort to determine what the pattern of change is, and compare previous studies of climate change using climate indices, a comparative study based in part on prior …

Subsistence And Resistance On The British Columbia Coast: Kingcome Village’S Estuarine Gardens As Contested Space, Douglas Deur, Nancy J. Turner, Adam Dick, Daisy Sewid-Smith, Kim Recalma-Clutesi

Anthropology Faculty Publications and Presentations

A case study is presented on the contested land ownership of the estuarine gardens in Kingcome Village, British Columbia (BC) between white settlers and the native Kwakwaka'wakw Indian Nation during the 19th century. The role that the natural resources of Kingcome Village's estuarine gardens played in white colonists' settlement of the Kingcome Village area is discussed.

An Anthropology Of Urbanism: How People Make Places (And What Designers And Planners Might Learn From It), Brooke D. Wortham-Galvin

Institute for Sustainable Solutions Publications and Presentations

In their word play on what design praxis might succeed the New Urbanism movement in the United States, the July 2013 article “Newest Urbanism” in the Architect introduced to the uninitiated the concept of tactical urbanism. Defining tactical urbanism as "temporary, cheap, and usually grassroots interventions—including so-called guerrilla gardens, pop-up parks, food carts, and 'open streets' projects—that are designed to improve city life on a block-by-block, street-by-street basis," the article claims that it took this approach to shaping the city less than a decade to mainstream into the practices of US cities and firms alike. While Architect used the term …

Late Holocene Tsunami Deposits At Salt Creek, Washington, Usa, Ian Hutchinson, Curt D. Peterson, Sarah L. Sterling

Anthropology Faculty Publications and Presentations

We interpret two thin sand layers in the estuarine marsh at Salt Creek, on the southern shore of the Strait of Juan de Fuca, as the products of tsunamis propagated by earthquakes at the Cascadia subduction zone. The sand layers extend for about 60 m along the left bank of the creek about 800 m from the mouth, and can be traced to the base of a nearby upland area. One layer is exposed in the creek bank about 400 m further upstream, but they are only patchily distributed in the rest of the central area of the marsh. Both …

Conflict Resolution In Islam: Document Review Of The Early Sources, Flamur Vehapi

Dissertations and Theses

Islam is the world's fastest growing religion. It is known to have an abundant and very rich amount of knowledge found in the Qur'an and the teachings of Prophet Muhammad, and as such, this religion has tremendously contributed not only to Muslim societies but also to the West. One aspect of this contribution explicated in this thesis is its contribution to the field of Conflict Resolution.

The primary purpose of this study is to unearth the tradition of peace and conflict resolution that comes out of the religion of Islam, which is unknown to many Muslims today. In this study, …

Mixed-Race Studies; Misstep Or The Next Step For Ethnic Studies In A Blending Nation?, Jennifer E. Robe

PSU McNair Scholars Online Journal

In January of 2011, the New York Times reported that 2010 U.S. Census data shows that younger generations are self-reporting their racial identity as multiracial or mixed-race in higher numbers than ever before¹. Classes in higher education that engage with race and ethnicity, often but not always as part of Ethnic Studies programs in universities, discuss and critique the categorizations of race and ethnicity. However, there is a social, political and economic power and privilege that groups have in being recognized as part of a categorized racial and/or ethnic group that mixedrace or multiracial identified individuals do not have when …

Constructing The Norte Grande: Chilean Infrastructure In The Northern Border Region, 1915-1929, William Cohoon

PSU McNair Scholars Online Journal

The norte grande, the far north, is comprised of the provinces of Antofagasta and Tarapacá. Acquired after the War of the Pacific, 1878 to 1883, this region increased Chile by almost a third,1 and possessed valuable mineral resources, such as sodium nitrate and guano. With these resources at Chile's disposal the government realized the norte grande, despite several decades of Great Britain‟s entrepreneurship, possessed limited infrastructure. This included, but was not limited to, the ports of Antofagasta and Arica not being up-to-date with improved technology to handle modern cargo loads, as well as Chile not being able to respond militarily …