Digital Commons Network^™

Effects Of Thinning And Prescribed Burning On Tree Resistance To Extreme Drought In A Sierra Nevada Mixed-Conifer Forest, California Usa, Chance C. Callahan

Cal Poly Humboldt theses and projects

Drought-induced tree mortality can drastically alter forest composition, structure, carbon dynamics, and ecosystem function. Increasingly, forest policy and management focuses on how to improve forest resistance and resilience to drought stress. This study used tree ring data at Teakettle Experimental Forest (TEF), a historically frequent fire mixed-conifer forest in the California Sierra Nevada, to quantify how prescribed fire and mechanical thinning conducted in 2001-2002 influenced stand and tree-level growth responses to the extreme California drought of 2012-2016. Overstory thinning and understory thinning significantly enhanced growth responses to treatments alone and treatments during the drought at the stand-level. In each year …

Freshwater And Marine Survival Of Coho Salmon (Oncorhynchus Kisutch) As A Function Of Juvenile Life History, Grace Katherine Ghrist

Cal Poly Humboldt theses and projects

Juvenile Coho Salmon (Oncorhynchus kisutch) in coastal California streams exhibit various life history strategies during their freshwater development. One strategy of interest to managers and conservationists is the early migrant. Juvenile early migrants emigrate from natal habitat into lower parts of the watershed or estuary during their first fall or winter, where they rear before migration to the ocean. By contrast, the more prevalent spring migrant resides in natal reaches over the winter and migrates directly to the ocean the following spring. Salmon monitoring programs generally estimate juvenile production and demographic rates using only spring migrants, and these …

Effects Of Longline Oyster Aquaculture On Benthic Invertebrate Communities In Humboldt Bay, California, Hannah C. Coe

Cal Poly Humboldt theses and projects

Oyster aquaculture has had a commercial presence in Humboldt Bay for nearly 60 years and has experienced changes in scope and methodology as the industry has grown. The traditional method of bottom-culture oyster beds has been phased out, with longline oyster aquaculture becoming the common replacement. However, this transition has preceded much of the research regarding potential impacts to the broader ecosystem. The benthic invertebrate community of Humboldt Bay is a vital food source for many commercially important fishes, as well as for the many shorebirds that utilize Humboldt Bay. The importance of the invertebrate community to the ecosystem highlights …

The Effects Of Oral Contraceptives On Mood And Affect: A Meta-Analysis, Erica M. Motter

Cal Poly Humboldt theses and projects

Combined oral contraceptive (COC) pills are widely used by women of reproductive age, but there is still little conclusive evidence that exists about the mood-related side effects associated with their use. This meta-analysis examined the relationship between oral contraceptive use and mood effects such as depression and anxiety to determine what role, if any, that COCs may have in the worsening or improvement of women’s mood when taking them. Effect sizes compared the differences in women’s mood scores before taking COCs and after one or more cycles of use. Seventeen studies made up of 25 individual samples contributed 71 effect …

Shade Trees Preserve Avian Insectivore Biodiversity On Coffee Farms In A Warming Climate, Sarah L. Schooler

Cal Poly Humboldt theses and projects

Coffee is an important export in many developing countries, with a global annual trade value of $100 billion. Climate change is projected to drastically reduce the area where coffee is able to be grown. Shade trees may mitigate the effects of climate change through temperature regulation for coffee growth, temperature regulation for pest control, and increase in pest-eating bird diversity. The impact of shade on bird diversity and microclimate on coffee farms has been studied extensively in the Neotropics, but there is a dearth of research in the Paleotropics. I examined the local effects of shade on bird presence and …

Achromatic Plumage Patch Quality: Internal Organ And Skeletal Correlates In Aleutian Cackling Geese (Branta Hutchinsii Leucopareia), Matthew D. Delgado

Cal Poly Humboldt theses and projects

Sexual selection theory predicts unique plumage patches signaling quality or status evolve via mate-choice and competition for mates. A growing body of research supports evidence that achromatic plumage patches may act as honest indicators of quality. Irregularities in these patches are attributed to an individual’s phenotypic and genotypic quality as well as environmental wear and tear. Aleutian cackling geese (Branta hutchinsii leucopareia) display achromatic plumage patches on their heads and necks, which may signal information about an individual’s attributes. I tested the honest advertisement and status signaling hypotheses by determining whether size and irregularities in the transition between …

Masculine Norms, Psychological Symptom Severity, And Intentions To Seek Formal Help In Male College Students, Zahra S. Shine

Cal Poly Humboldt theses and projects

Research has consistently found men to be less likely than women to seek help for mental health symptoms. Additionally, greater symptom severity is related to higher levels of help seeking, although this relationship is less clear among men. Greater conformity to masculine norms may help to explain the relationship between symptom severity and help seeking among men. The present study aimed to further research on men’s help-seeking by examining whether conformity to masculine norms would moderate the relationship between symptom severity and help-seeking intentions in male college students (N = 89). A multiple regression analysis was conducted with all …

Eye Movements For Learned Faces, Mariah Lehnertz

Cal Poly Humboldt theses and projects

Humans demonstrate a perceptual specialization for faces that is astonishing. This project attempts determine if and where within the perceptual process face perception and face recognition diverge at the level of eye movement behaviors. Participants were exposed to a series of 36 faces, of which six were randomly selected to be learned over five subsequent exposures; thus the same face identities served as both the novel faces (block 1) and the learned faces (block 5), allowing for the measurement of eye gaze patterns during initial face perception (novel) and face recognition (learned). These six faces were randomly assigned to different …

Mechanisms And Spatial Patterns Of Bark Beetle-Associated Mortality Following Variable Density Thinning Treatments In A Sierra Mixed-Conifer Forest, Alexis Bernal

Cal Poly Humboldt theses and projects

Long-term trends of tree mortality have increased over the last several decades, coinciding with above-average temperatures, high climatic water deficits, and bark beetle outbreaks. With the anticipation that drought and bark beetles may increase with climate change, uncertainty exists over the appropriate treatments that could ensure the future sustainability of forest resources and the ecosystem services that forests provide. Conventional thinning treatments are used to reduce stand density, with the assumption that reductions in competition can alleviate drought stress and enable trees to resist bark beetle attack. Alternative thinning treatments may also reduce stand density, but have a greater focus …

Addressing Divergent Audiences In Conservation Communication: An Examination Of Land Trust Websites In Northern California, Tova Fleming

Cal Poly Humboldt theses and projects

In a world rich with a diversity of stories and values, successful conservation must not rely on everyone thinking and feeling the same way. Values are the foundation of the cognitive hierarchy of human behavior and are relatively fixed and unlikely to change. As a result, environmental communication that is reliant on a particular set of values may cause polarization around conservation issues. The reasoned action approach offers a way to explore communication techniques that address the cognitive hierarchy of human behavior at its most malleable point, behavioral intentions. Because land trusts work with historically divergent audiences who are often …

Towards A Critical Game Based Pedagogy, Justin K. Egan

Cal Poly Humboldt theses and projects

This thesis outlines and examines core concepts of game-based learning as identified by James Paul Gee, and Kurt Squire, among other scholars. These findings are then connected to the contemporary, transformative threshold concepts of composition—as explored in Naming What We Know. This connection seeks to argue game-based pedagogy may be an invaluable tool for introducing critical perspectives to composition students in order to better equip them with critical thinking strategies and cultural critiques, while improving their writing skills. A theoretical framework is presented in the form of four “Pillars” of a Critical Game-Based Pedagogy: Literacy, Identity, Social Learning, and Multimodality—all …

An Intersectional Perspective On Diversity In Environmental Regulatory Agencies: A Case Study Of Women Of Color And Their Liminal Position Of Identity In South Florida, Leah A. Ramnath

Cal Poly Humboldt theses and projects

Diversity statistics from environmental agencies nationwide reveal overall growth and improvement in gender and racial composition of employees. However, although women occupied over half of leadership and staff positions, most were white women. The Regulatory and Economic Resources office, an environmental regulatory agency in south Florida, is exceptional as a majority of their employees are women of color. Although there has been continuous development of diversity initiatives by environmental agencies nationwide, perspectives of how women of color are experiencing the environmental workplace are underrepresented when reporting diversity data.

My study aims to understand the complex role of diversity in environmental …

Drought And Coyotes Mediate The Relationship Between Mesopredators And Human Disturbance In California, Molly K. Parren

Cal Poly Humboldt theses and projects

Mesopredators in California are facing two major changes to their ecosystem: drought and the expansion of human disturbance. As a result, mesopredators are likely shifting their habitat use as well as their interspecies interactions to balance resource needs and risk-taking on the landscape. In response to severe drought, the California Department of Fish and Wildlife deployed 585 camera traps throughout the Mojave Desert and Central Valley documenting mammalian mesopredator presence in a drought year (2016) and a post-drought year (2017). The objectives of this study were to examine spatial patterns of mesopredator occurrence and co-occurrence with a dominant predator, the …

Autumn Roost Selection By Male Hoary Bats (Lasiurus Cinereus) In Northern California, Danielle (Skye) Salganek

Cal Poly Humboldt theses and projects

The hoary bat, Lasiurus cinereus, is a solitary bat that roosts in the foliage of trees throughout the western hemisphere. Roosts are subject to the ambient temperature of their surroundings, thus hoary bats undergo long-distance migrations between summer and winter ranges to avoid freezing temperatures. Habitat selection has been studied during the summer for maternal female hoary bats, but not during migration and winter. Autumn migration coincides with the hoary bat mating period and it has been proposed that male and female bats may rendezvous on migration paths. Individuals may select roosts in stopover locations that enhance fitness by providing …

Multidecadal Change In Aspen Experiencing Long-Unburned, Mixed-Severity Wildfire, And Reburn Disturbance Regimes, Cerena Brewen

Cal Poly Humboldt theses and projects

Quaking aspen (Populus tremuloides) is a valued, minor component on western landscapes. It provides a wide range of ecosystem services, and has been in decline for the last century. This decline may be explained partially by the lack of fire on the landscape as aspen benefit from fire that eliminates conifer competition and stimulates reproduction through root suckering. Managers are interested in aspen restoration but have a lack of knowledge about their spatial dynamics in response to fire. Improving our understanding of aspen stand spatial changes over time may be important for maintaining their presence on landscapes where …

Wealth-Based Penal Disenfranchisement, Beth A. Colgan

Vanderbilt Law Review

This Article offers the first comprehensive examination of the way in which the inability to pay economic sanctions-fines, fees, surcharges, and restitution-may prevent people of limited means from voting. The Supreme Court has upheld the constitutionality of penal disenfranchisement upon conviction, and all but two states revoke the right to vote for at least some offenses. The remaining jurisdictions allow for reenfranchisement for most or all offenses under certain conditions. One often overlooked condition is payment of economic sanctions regardless of whether the would-be voter has the ability to pay before an election registration deadline. The scope of wealth-based penal …

The Context Of Authority And Sociological Knowledge: An Experiential Learning Project, Julia F. Waity, Stephanie Crowe

Communications in Information Literacy

In this innovative project, a social sciences librarian partnered with a sociology professor to embed the “Authority is Constructed and Contextual” frame into an upper-division sociology of poverty course. Students in this course participated in an experiential learning project, collaborating with local children on a participatory photo mapping project to document the children’s neighborhood. By working directly with community members in this field experience, the students gained an understanding of the differences between scholarly authority and community authority and what can be learned about poverty from each type of source. Engagement with a local community provides students with a direct …

Libraries And Fake News: What’S The Problem? What’S The Plan?, Matthew C. Sullivan

Communications in Information Literacy

This article surveys the library and information science (LIS) response to the problems of fake news and misinformation from the 2016 U.S. presidential election to the end of 2018, focusing on how librarians and other information professionals in the United States have articulated the problems and the paths forward for combating them. Additionally, the article attempts to locate the LIS response in a larger interdisciplinary misinformation research program, provide commentary on the response in view of that research program, and lay out both a possible research agenda for the field and practical next steps for educators ahead of the 2020 …

Conceptual And Procedural Knowledge: A Framework For Analyzing Point-Of-Need Information Literacy Instruction, Amy Vanscoy

Communications in Information Literacy

The information literacy instruction (ILI) that occurs during a spontaneous information interaction, such as at the reference desk, is not clearly defined and not extensively researched. It differs, however, from classroom ILI, with its lesson plans, carefully considered learning outcomes, and planned learning activities. This paper uses the framework of conceptual and procedural knowledge, drawn from education research, to analyze point-of-need ILI. Digital reference transcripts were analyzed using this framework, and examples of ILI from the transcripts were categorized to make sense of how conceptual and procedural knowledge manifest in point-of-need ILI. This conceptual/procedural focus acknowledges the unique context of …

From Syndication To Misinformation: How Undergraduate Students Engage With And Evaluate Digital News, Cara Evanson, Jayme Sponsel

Communications in Information Literacy

To determine how undergraduate students engage with digital news, researchers at Davidson College surveyed 511 incoming first-year students on their news consumption habits and asked them to evaluate screenshots of news stories. The researchers found that a high percentage of the students were accessing news through social media platforms, and that syndication and fake URLs posed challenges for them in making accurate evaluations. Additionally, students indicated they would share a tweet containing an impostor URL at higher rates than they would share the other news story examples. The findings have implications for how educators teach students to evaluate misinformation.

Car T-Cell Therapy For Acute Lymphoblastic Leukemia, Esther Langner

The Science Journal of the Lander College of Arts and Sciences

Despite all the available therapies, Acute Lymphoblastic Leukemia (ALL) remains extremely difficult to eradicate. Current available therapies, which include chemotherapy, radiation, and stem cell transplants, tend to be more successful in treating children than adults. While adults are more likely than children to relapse after treatment, the most common cause of treatment failure in children is also relapse. Improved outcomes for all ALL patients may depend upon new immunotherapies, specifically CAR T-cell therapy. CAR T-cell therapy extracts a patient’s own T-cells and modifies them with a CD19 antigen. This modification allows the new T-cells to recognize and kill cancer cells …

Triggers Of Spermatogenesis, Moses Bibi

The Science Journal of the Lander College of Arts and Sciences

Of the 7% of men affected with infertility, about 54% suffer from pre-testicular and/or testicular factor induced azoospermia/ oligospermia. This agenesis of spermatozoa has been the subject of much andrology research over the past 50 years, with a particular focus in the triggers of spermatogenesis. While much of their work is limited to murine populations, researchers have put a lot of emphasis on the spermatogonial stem cell (SSC) niche as the source of the trigger(s). By following physiological patterns exhibited in the seminiferous epithelium, researchers have been able to detect distinct morphological stages that correlate with spermatogonial germ-line action. Different …

Constructing More Reliable Law And Policy: The Potential Benefits Of The Underused Delphi Method, Juan Bataller-Grau, Elies Segui-Mas, Javier Vercher-Moll, Jeffrey W. Stempel

Scholarly Works

Law has long aspired to achieve status as a science. A central theme of much legal philosophy has been the quest for legal doctrine to become more like scientific axioms or findings produced through a scientific inquiry. Considerable debate has surrounded the issue. Part of the legal profession sees the question of law's science status as doomed to failure and regards law as a distinct type of discipline. Others in the legal profession are attracted to the aspiration but express doubt regarding whether the methods that the legal doctrine has traditionally employed can achieve the greater apparent rigor of the …

Political Dysfunction And Constitutional Structure, David Orentlicher

Scholarly Works

In this essay, Professor Orentlicher reviews three books that analyze different features of the U.S. political system:

1. Michelle Belco & Brandon Rottinghaus, The Dual Executive: Unilateral Orders in a Separated and Shared Power System (Stanford Univ. Press 2017).

2. Richard A. Posner, The Federal Judiciary: Strengths and Weaknesses (Harvard Univ. Press 2017).

3. Martin H. Redish, Judicial Independence and the American Constitution: A Democratic Paradox (Stanford Univ. Press 2017).

Mediator Burnout, Lydia Nussbaum

Scholarly Works

Being a mediator is hard work Mediators must make meaningful connections with individuals without over-stepping bounds of impartiality, manage emotions without becoming emotionally invested, and empower decision-making without undermining self-determination. Decades of research into occupational stress, also known as "burnout," indicates that mediators not only are susceptible to burnout, but also that the symptoms of burnout undermine fundamental principles of quality mediation. For example, a burned-out mediator may exhibit narrow and uncreative thinking, diminished capacity to regulate emotions, compromised decision-making, and deficits in attention and memory.

The prospect of mediator burnout not only threatens the quality of mediation, but it …

The Territorial Discrepancy Between Intellectual Property Rights Infringement Claims And Remedies, Marketa Trimble

Scholarly Works

When in Equustek v. Google a Canadian court ordered that Google de-list the pages of a defendant that infringed intellectual property (“IP”) rights under Canadian law, some commentators were surprised not only by the Canadian court’s assertion of personal jurisdiction over Google (a U.S. third party who was not a party to the original Canadian IP rights infringement litigation), but also by the court’s issuance of a remedy with global effects. However, global and other extraterritorial remedies are not unknown in IP rights infringement cases: U.S. courts have granted extraterritorial remedies in a number of such cases. This Article reviews …

Made In Taiwan: Alternative Global Models For Marriage Equality, Stewart Chang

Scholarly Works

This Article comparatively analyzes the judicial decisions that led to same-sex marriage equality in Taiwan, South Africa, and the United States. After first evaluating the structural mechanisms that led Taiwan to become the first Asian nation to legalize same-sex marriage through Interpretation No. 748 of the Taiwan Constitutional Court, this Article then draws comparisons to how marriage equality was similarly affected through a delayed imposition of the court order in South Africa to allow the legislature an opportunity to rectify the law in Minister of Home Affairs v. Fourie, and finally considers how these approaches provide equally viable and more …

The Masculinity Mandate: #Metoo, Brett Kavanaugh, And Christine Blasey Ford, Ann C. Mcginley

Scholarly Works

In fall 2019, the Senate Judiciary Committee held hearings involving Dr. Christine Blasey Ford's testimony about then-Judge Brett Kavanaugh's alleged behavior at a high school party gone awry.

This essay uses identity performance and multidimensional masculinities theories to analyze the hearings, specifically to consider the gender, race, and class performances of the participants, and how partisans and non-partisans interpreted those performances. This examination demonstrates that the judgment concerning masculinity and femininity performances and their appropriateness is, to a certain extent, in the eye of the beholder. By the same token, public interpretations are not arbitrary. Rather, at least in this …

Going Rogue: Mobile Research Applications And The Right To Privacy, Stacey A. Tovino

Scholarly Works

This Article investigates whether nonsectoral state laws may serve as a viable source of privacy and security standards for mobile health research participants and other health data subjects until new federal laws are created or enforced. In particular, this Article (1) catalogues and analyzes the nonsectoral data privacy, security, and breach notification statutes of all fifty states and the District of Columbia; (2) applies these statutes to mobile-app-mediated health research conducted by independent scientists, citizen scientists, and patient researchers; and (3) proposes substantive amendments to state law that could help protect the privacy and security of all health data subjects, …

Protecting Auto Accident Victims From The Um/Uim Insurer Identity Crisis, Jeffrey W. Stempel, Erik S. Knutsen

Scholarly Works

Automobile liability insurance is mandatory for drivers in all states, so as to provide for an available source of compensation for auto accident victims. Yet more than 20% of drivers in some states drive without valid, collectible automobile liability insurance. Another vast proportion of drivers have woefully inadequate financial limits of liability insurance that could not pay for even a modest percentage of a typical accident victim's compensatory needs. An auto accident victim cannot choose which tortfeasor driver injures her in a collision. Without the at-fault tortfeasor driver's liability insurance to act as a source of full compensation for her …