Digital Commons Network^™

Climate Change And Species Interactions Jointly Shape Migration Timing And Growth At A Critical Ontogenetic Transition In Juvenile Sockeye Salmon, Margaret E. Veatch

Honors Theses

Climate change is shifting the timing of biological events globally, but the mechanisms linking environmental variation to phenological changes are poorly understood in many systems, particularly those where individuals undergo ontogenetic habitat shifts. Here, I examined the join influence of climate-driven environmental variability and species interactions migration timing and body size at migration in juvenile sockeye salmon (Oncorhynchus nerka) in Lake Aleknagik, Alaska, using a multi-decadal dataset (1967–2024). Migration timing varied widely among years and was best explained by a combination of ice-out phenology, epilimnetic temperature, and fish densities in littoral habitats. Juvenile sockeye salmon migrated earlier in …

Eco-Emotions And Climate Activism In Adolescents, Julianna Sahoo

Master's Projects and Capstones

Background. Youth are especially vulnerable to climate change, both physically and psychologically. Combatting climate change will require a coordinated, global effort. Understanding the motivations and emotions behind climate activism is essential to coordinate efforts to combat climate change.

Methods. This research uses survey data collected from first and second year undergraduates (n=521) at a private, urban university in California in the Fall of 2022. Youth were surveyed on emotions related to climate change, activism, compassion, eco-anxiety, and well-being.

Results. Experiencing positive emotions had a stronger relationship with environmental activism compared to negative emotions.

Conclusion. Results suggest climate change communications should …

Characterizing The Diet Of A Threatened Seabird, The Marbled Murrelet Brachyramphus Marmoratus, Using High-Throughput Sequencing, Emily D. Fountain, Paige J. Kulzer, Richard T. Golightly, James W. Rivers, Scott F. Pearson, Martin G. Raphael, Matthew G. Betts, S. Kim Nelson, Daniel D. Roby, Nicholas F. Kryshak, Stephanie Schneider, M. Zachariah Peery

Marine Ornithology

Understanding prey consumption patterns is critical to understanding the ways in which seabirds cope with a changing ocean. However, characterizing the dietary habitats of seabirds can be challenging. In this study, we investigated the diet of the Marbled Murrelet Brachyramphus marmoratus population that lives in waters off California, Oregon, and Washington, USA, using fecal DNA, custom metabarcoding, and high-throughput sequencing. Murrelets were captured at sea by dip-netting at night. Across this region, murrelets consumed highly diverse prey types including 17 fish species and 10 invertebrate species, in accord with previous work indicating the species’ forage on a wide range of …

How Does Climate Change Affect The Bird Migration Season And Number Of Bird Strikes?, Moe Myint Paing Soe, Justin Yan Yu Koh, Hong Kai Immanuel Quek, Fonzie Rey Raymundo Torres

Introduction to Research Methods RSCH 202

While it is wildly accepted that climate change has led to a shift in bird migration seasons and patterns, how does this change affect the occurrence of strikes between birds and aircraft? Analysing bird strike data from the FAA's Wildlife Strike Database and average annual temperature variations in the United States, we seek to find out if climate change has had an impact on bird strikes between 1990 and 2015 using multiple linear regression. Understanding the wider effects of climate change on the daily operation of aircraft would highlight if there were a need to update wildlife hazard management methods, …

In Hot Water: Uncertainties In Projecting Marine Heatwaves Impacts On Seagrass Meadows, Paula S. Hatum, Kathryn Mcmahon, Kerrie Mengersen, Jennifer K. Mcwhorter, Paul P.Y. Wu

Research outputs 2022 to 2026

Seagrass ecosystems, vital as primary producer habitats for maintaining high biodiversity and delivering numerous ecosystem services, face increasing threats from climate change, particularly marine heatwaves. This study introduces a pioneering methodology that integrates Dynamic Bayesian Networks of ecosystem resilience with climate projections, aiming to enhance our understanding of seagrass responses to extreme climate events. We developed cutting-edge metrics for measuring shoot density and biomass in terms of population and site extinction, presented as annual ratios relative to their respective baselines. These metrics include associated uncertainties and projected recovery times. This innovative approach was applied in a case study focusing on …

A Regional Analysis Of Climate Change Effects On Global Snow Crab Fishery, Jingjing Tao, Kwamena Quagrainie, Kenneth A. Foster, Nicole Olynk Widmar

Department of Agricultural Economics Faculty Publications

The snow crab fishery faces increasing vulnerability to environmental factors, yet the literature on the relationship between climate change and snow crab harvest remains limited. This study estimates snow crab harvest functions using climate change indicators with unbalanced panel data of snow crab production from the eastern Bering Sea (Alaska), the southern Gulf of St. Lawrence (Canada), the Sea of Japan, and the Barents Sea (Norway-Russia). The relationship between snow crab biomass, stock, and catch is analyzed and the endogeneity of stock in the harvest function is also addressed using climate change indicators as instrumental variables (IVs). The results show …

Using Multi-Scale Spatial Models Of Dendritic Ecosystems To Infer Abundance Of A Stream Salmonid, Xinyi Lu, Yoichiro Kanno, George P. Valentine, Jacob M. Rash, Mevin B. Hooten

Mathematics and Statistics Faculty Publications

1. Understanding patterns of species abundance is essential for planning landscape-level conservation. The complex hierarchies of dendritic ecosystems result in different levels of heterogeneity at distinct geographic scales. Species responses to dynamic environmental drivers may also vary spatially depending on their interactions with landscape features. Monitoring abundance by explicitly quantifying their spatial and temporal variation is important for strategic management.

2. We analysed brook trout (Salvelinus fontinalis) count data collected from 173 sites in western North Carolina between 1989 and 2015. We developed a Bayesian hierarchical model that used single- and multi-pass electro-fishing data and characterized their respective …

From Redlining To Greenlining, Danielle Stokes

Law Faculty Publications

For generations, marginalized communities have been impacted by discriminatory land use, zoning, and property valuation policies, from redlining in the 1930s to the siting of undesirable land uses that persists today. Because of these policies, marginalized communities are forced to contend with low property values, substandard infrastructure, and increased health risks. The very same mechanisms that created these injustices, however, may now be key to addressing them. This Article introduces “greenlining” as a land use planning mechanism that seeks to remediate historical housing, siting, and economic disparities while forging a path toward energy and environmental justice. Greenlining, the productive and …

State Of Coastal And Marine Resources: Sablayan, Occidental Mindoro, Ma Celina J. Añonuevo, Jemelyn Grace P. Baldisimo, Denmark B. Racamara, Mary Joyce P. Velos, Joseph Benedict T. Garcia, Frederico B. Sabban, Joey P. Cabasan, Rhea Mae Luciano, Darryl Anthony Valiño, Lovely Joy Heyres, Hazel O. Arceo

Biological Sciences Faculty Publications

[Introduction] Sablayan, situated on the western side of Mindoro Island facing the WPS (12.8564° N, 120.9101° E), is a first-class municipality in the province of Occidental Mindoro with a total land area of 2,188.8km² that is divided into 22 barangays, nine of which are along the coast. The coastline stretches for 115 km, with municipal waters covering approximately 750,000 km² (LGU-Sablayan 2008).

The Apo Reef Natural Park, one of its most prominent features, is located approximately 33 km off the coast (Figure 2.9-1) The Apo Reef Natural Park is a protected coral reef system under presidential proclamation 868 (1996) encompassing …

State Of Coastal And Marine Resources: Lian, Batangas, Joseph Benedict T. Garcia, Mary Joyce P. Velos, Jemelyn Grace P. Baldisimo, Joey P. Cabasan, Ma Celina J. Añonuevo, Denmark B. Recamara, Hazel O. Arceo

Biological Sciences Faculty Publications

[Introduction] Lian (13.9852° N, 120.6545° E) is a third-class municipality in the northwestern part of the province of Batangas. It is bounded on the north by the municipality of Nasugbu, on the east by the municipalities of Tuy and Balayan, on the west by the WPS, and on the south by the municipality of Catatagan (Figure 2.7-1). It has a total land area of 76.80km² that is divided into 19 barangays, six of which are coastal and two are integrated coastal barangays (LGU-Lian 2013). Its total population is 56,280 individuals in 15,991 households as of 2020 (PSA 2020).

The main …

Taking Sides? Aspect Has Limited Influence On Soil Environment Or Litter Decomposition In Pan-European Study Of Roadside Verges, A. Amstutz, L. B. Firth, J. I. Spicer, P. De Frenne, L. Gómez-Aparicio, B. J. Graae, S. Kuś, S. Lindmo, A. Orczewska, F. Rodríguez-Sánchez, P. Vangansbeke, T. Vanneste, M. E. Hanley

School of Biological and Marine Sciences

In addition to well-known effects on species ecophysiology, phenology, and distributions, climate change is widely predicted to impact essential ecosystem services such as decomposition and nutrient cycling. While temperature and soil moisture are thought to influence litter decomposition, elucidating consistent soil process responses to observed or predicted shifts in climate have proven difficult to evidence. Here we investigated how aspect (i.e., north-south orientation), a natural model for variation in soil temperature, influenced soil physico-chemical conditions and decomposition of two standardised litter types (Green tea and Rooibos teabags) in Pole-facing (PF) and Equator-facing (EF) roadside verges spanning a 3000 km and …

Linking Microbial Community Assembly In Flowers With Function Under Diverse Environmental Conditions: A Case Study Involving Erwinia Amylovora, Christopher Skylar Mcdaniel

All Graduate Theses and Dissertations, Fall 2023 to Present

Fire blight, a devastating disease of pome fruit trees caused by the bacterium Erwinia amylovora, can cause millions of dollars in losses for producers each year around the globe. Management approaches that involve use of antibiotics, such as streptomycin, can be effective; although concerns exist over pollinator and crop health when using them regularly. Recently, there have been developments that allow for biological agents such as microbes to curtail fire blight infection. These agents work by competing with Erwinia for resources or space, producing antibacterial compounds, or even killing Erwinia cells on contact. Unfortunately, these agents do not yet …

Ecological Change And Livestock Governance In A Peruvian National Park, Kenneth R. Young, Eyner Alata, Rodney Chimner, Randall B. Boone, Gillian Bowser, Laura Bourgeau-Chavez, Beatriz Fuentealba, Jessica Gilbert, Javier A. Ñaupari, Molly H. Polk, Sigrid Resh, Cecilia Turin, Melody Zarria-Samanamud

Michigan Tech Publications

While the grazing of livestock has occurred for millennia in the Andes, current sustainability debates center on concerns with co-managing climate change and pastoralism. These discussions have special resonance in places protected by the state for biodiversity, scenery, and sustainable and traditional land uses, such as those found in protected areas and biosphere reserves. For this article, we integrate data from a social-ecological research project on the land use systems that affect high-elevation ecosystems in Peru’s Huascarán National Park, with special emphasis on the wetlands. We used land cover and land use data and insights from interactions with pastoralists to …

Mesophotic Coral Bleaching Associated With Changes In Thermocline Depth, Clara Diaz, Nicola L. Foster, Martin J. Attrill, Adam Bolton, Peter Ganderton, Kerry L. Howell, Edward Robinson, Phil Hosegood

School of Biological and Marine Sciences

As global temperatures continue to rise, shallow coral reef bleaching has become more intense and widespread. Mesophotic coral ecosystems (30–150 m) reside in deeper, cooler, water and were thought to offer a refuge to shallow-water reefs. Data now show that mesophotic coral ecosystems instead have limited connectivity with shallow corals but host diverse endemic communities. Given their extensive distribution and high biodiversity, understanding their susceptibility to warming oceans is imperative. In this multidisciplinary study we show evidence of coral bleaching at 90 m in the Indian Ocean, despite the absence of shallow-water bleaching. The bleaching was associated with sustained thermocline …

The Effects Of Recent Climate Change On Spring Phenology, With A Special Focus On Patterns Of Bee Foraging, Michael Stemkovski

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The date on which plants flower and on which bees begin to pollinate varies year-to-year depending on differences in weather. This seasonal timing is known as phenology, and it is already clear that climate change has pushed the spring phenology of many species earlier by increasing temperatures. This is particularly clear in flowering plants, but studying how and why the phenology of pollinators is shifting is more difficult. Most flowering plants rely on pollinators such as bees for their reproduction, and most bees rely on flowers for their sustenance, so bee and flower phenology has to overlap for the crucial …

Climate Change, Site Formation, And Indigenous Use Of Coastlines In Barbuda, Isabel C. Rivera-Collazo, Sophia Perdikaris

School of Global Integrative Studies: Faculty Publications

This article explores the landscape dynamics at the island of Barbuda in the context of changing climate to understand (1) the environmental setting of indigenous settlements; (2) the impacts of current coastal processes; and (3) the potential threats moving forward toward increasing pressure of climate change. Focusing on the site of Seaview, on the east coast of Barbuda, we use geoarchaeological methods to reconstruct the ancient geomorphological setting, investigate changes post-abandonment, and identify the hazards faced under future sea-level projections. Our study shows that (1) sea level stabilization after the Mid-Holocene allowed the formation of coral reefs, seagrass beds and …

Physiological And Transcriptomic Responses Of Two Artemisia Californica Populations To Drought: Implications For Restoring Drought-Resilient Native Communities, Hagop S. Atamian Dr., Jennifer L. Funk

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

As climate change brings drier and more variable rainfall patterns to many arid and semi-arid regions, land managers must re-assemble appropriate plant communities for these conditions. Transcriptome sequencing can elucidate the molecular mechanisms underlying plant responses to changing environmental conditions, potentially enhancing our ability to screen suitable genotypes and species for restoration. We examined physiological and morphological traits and transcriptome sequences of coastal and inland populations of California sagebrush (Artemisia californica), a critical shrub used to restore coastal sage scrub vegetation communities, grown under low and high rainfall environments. The populations are located approximately 36 km apart but …

Futures On Dry Ground: Anthropology And Coastal Planning, Theodore Hilton, Sheehan Moore

Publications and Research

Around the world, governments, industry, and other actors are creating plans to save coasts from environmental crisis. Louisiana is one prominent example: levees and other measures protect oil and gas infrastructure from inundation as the wetlands buffer rapidly erodes—in large part due to that same industry. The state’s primary answer to land loss is a $50 billion Coastal Master Plan. To illuminate such responses in Louisiana and globally, this article reviews emerging literature and frames an anthropology of coastal planning around three themes: (1) novel orientations toward time and space, (2) the reproduction of power and capital in the name …

Landscape Genomics Of The Tussock Cottongrass (Eriophorum Vaginatum) And The Dwarf Birch (Betula Nana) In North Central Alaska, Elizabeth Stunz

Open Access Theses & Dissertations

Global climate change has resulted in geographic range shifts of flora and fauna at a global scale. Extreme environments, like the Arctic, are seeing some of the most pronounced changes. This region covers 14% of the Earthâ??s land area, and while many arctic species are widespread, understanding ecotypic variation at the genomic level will be important for elucidating how range shifts will affect ecological processes. Increase in shrub cover is a major effect of ongoing climate change in arctic tundra ecosystems. The relative increases in abundance and cover of shrub species such as birch, willow, and alder (Betula, Salix, and …

Economic Freedom, Climate Culpability, And Physical Activity Indicators Among Children And Adolescents: Report Card Grades From The Global Matrix 4.0, Eun Young Lee, Patrick Abi Nader, Salomé Aubert, Silvia A. González, Peter T. Katzmarzyk, Asaduzzaman Khan, Wendy Y. Huang, Taru Manyanga, Shawnda Morrison, Diego Augusto Santos Silva, Mark S. Tremblay

Population and Public Health Science Faculty Publications

Background: Macrolevel factors such as economic and climate factors can be associated with physical activity indicators. This study explored patterns and relationships between economic freedom, climate culpability, and Report Card grades on physical activity-related indicators among 57 countries/jurisdictions participating in the Global Matrix 4.0. Methods: Participating countries/ jurisdictions provided Report Card grades on 10 common indicators. Information on economic freedom and climatic factors were gathered from public data sources. Correlations between the key variables were provided by income groups (ie, low- and middle-income countries/jurisdictions and high-income countries/jurisdictions [HIC]). Results: HIC were more economically neoliberal and more responsible for climate change …

Biological Hydrogen Gas Production From Food Waste As A Sustainable Fuel For Future Transportation, Pitiporn Asvapathanagul, Leanne Deocampo, Nicholas Banuelos

Mineta Transportation Institute

In the global search for the right alternative energy sources for a more sustainable future, hydrogen production has stood out as a strong contender. Hydrogen gas (H2) is well-known as one of the cleanest and most sustainable energy sources, one that mainly yields only water vapor as a byproduct. Additionally, H2 generates triple the amount of energy compared to hydrocarbon fuels. H2 can be synthesized from several technologies, but currently only 1% of H2 production is generated from biomass. Biological H2 production generated from anaerobic digestion is a fraction of the 1%. This study aims to enhance biological H2 production …

Effects Of Forest Restoration On The Recovery Of Dead Wood, Associated Arthropods, And Insect-Mediated Wood Decomposition, Estefania Fernandez Barrancos

Dissertations

Dead wood represents 8% of terrestrial carbon stocks and is an important source of habitat and food for decomposer and non-decomposer arthropods. However, anthropogenic disturbance reduces the amount of dead wood, putting at risk the presence of a habitat that is essential for many arthropods and other organisms that rely on it for food and shelter. Forest restoration aims to assist the recovery of ecosystems that have been damaged or destroyed and could be a means to recover both dead wood and its associated arthropod communities. This doctoral dissertation lies at the intersection of climate change, biodiversity loss and ecological …

Remedying Renewable Energy Research: Implementation Of Green Chemistry In Laboratories, Julia Mayes

Student Theses 2015-Present

One of the pillars of environmental studies is the analysis of the natural world and the research being done to rectify harmful human activity on it. Laboratory components in the fields of chemistry, biology, ecology, among others, are powerful tools for learning about the way our environment works and assessing how human activities harm it. More advanced laboratories conduct research in the pursuit of new technologies to mitigate anthropogenic climate change. Concurrently, this work yields large quantities of waste. While laboratories are inherently valuable to the field of environmental science, the waste created by them raises a question of net …

Global Atmospheric Change And Its Effect On Managed Grassland Systems, Andreas Lüscher, J. Fuhrer, P. C. D. Newton

IGC Proceedings (1977-2023)

Key points

1. Increasing atmospheric CO2 concentration and a trend to warmer mean temperatures are the most reliable aspects of global atmospheric change. Projections of the extent of climate change and the frequency of extreme weather conditions remain uncertain.

2. Research has considerably reduced the uncertainty about effects of global atmospheric change on physiology of plants, productivity and species composition of plant communities.

3. Other factors (e.g. nutrient availability, soil type) and long-term adaptation of the ecosystem (e.g. nutrient cycling and sequestration) influence the response of plant communities to global atmospheric change. Generalisation is not possible with respect to the …

Developing High-Resolution Meteorological Datasets To Assess The Short-Term Association Between Meteorological Factors And Green Space And Mental Disorders, Xinlei Deng

Legacy Theses & Dissertations (2009 - 2024)

Global climate change is linked to the frequency and intensity of local climate extremes such as heatwaves, cold spells, and flooding. Scientific evidence indicates that heatwaves and higher ambient temperature could increase the risk of hospital admission and emergency department (ED) visits for mental disorders (MDs). On the other hand, urban green space is considered a way to reduce heat island effects and provide comfort for area residents. However, there still exist huge research gaps. Except for temperature, few studies have examined how other meteorological factors (relative humidity (RH), solar radiation (SR), heat index (HI), and rainfall) are associated with …

The Nexus Of Climate Change, Covid-19, And Environmental Justice On Children's Health, Emma Pennea, Laura Anderko, Caroline Moore, Ruth Mcdermott-Levy

Journal of Applied Research on Children: Informing Policy for Children at Risk

Climate change poses a threat to children, who are increasingly vulnerable, depending on adults to protect them from the impacts of these changes including extreme weather events, poor air and water quality and risk to mental health. Children living in poverty carry additional burdens and risks, living in environments that consistently experience poor air and water quality from polluting industries, compounded by the effects of climate change. COVID-19 has placed additional challenges to children’s health and increases the complexity of addressing climate change and environmental justice. The intersection between climate change and COVID-19 exacerbates these existing disparities by impacting children's …

Coral Bleaching Response Is Unaltered Following Acclimatization To Reefs With Distinct Environmental Conditions, Katie L. Barott, Ariana S. Huffmyer, Jennifer M. Davidson, Elizabeth A. Lenzb, Shayle B. Matsuda, Joshua R. Hancock, Teegan Innis, Crawford Drury, Hollie M. Putnam, Ruth D. Gates

Biological Sciences Faculty Publications

Urgent action is needed to prevent the demise of coral reefs as the climate crisis leads to an increasingly warmer and more acidic ocean. Propagating climate change-resistant corals to restore degraded reefs is one promising strategy; however, empirical evidence is needed to determine whether stress resistance is affected by transplantation beyond a coral's native reef. Here, we assessed the performance of bleaching-resistant individuals of two coral species following reciprocal transplantation between reefs with distinct pH, salinity, dissolved oxygen, sedimentation, and flow dynamics to determine whether heat stress response is altered following coral exposure to novel physicochemical conditions in situ. Critically, …

Wicked Problems: Understanding How Cities And Counties In California Are Tackling Climate Change And Homelessness, Guadalupe Michelle Franco

Master's Theses

California continues to endure the detrimental effects of climate change, such as poor air quality, flooding, and heatwaves. Concurrently, the state has seen an increase in the number of unhoused communities due to various ramifications such as rapid urbanization, failed political leadership, and restricted housing policies. While unhoused communities fight to access basic services, they must also now adapt to the looming impacts of climate change. Unhoused populations are especially vulnerable to climate change as they have limited access to shelter, spend the majority of their time outdoors, and lack the economic ability to adapt. While cities and counties are …

Theory And Practice: Selecting And Implementing Effective Framing To Present Climate Science To A Lay Audience, Lauren Wilson

Honors Theses

The purpose of this thesis is to explore the advantages and effectiveness of using storytelling in the form of narrative journalism to communicate the topic of climate science to a lay audience. The thesis combines personal experience with secondary research in order to support the claim that framing the issue in such a manner effectively communicates the severity and impact of climate change.

Through my research I discovered that storytelling is not only a social tool for humans, but a means to safely and efficiently pass on vital information to those unfamiliar with certain knowledge. The use of narrative has …

Sexual Dimorphism Of Thermal Preference In Florida Scrub Lizards (Sceloporus Woodi) And Predicting Response To Climate Change In Two Rare Habitats, Sidney E. Anderson

College of Graduate Studies: Theses & Dissertations

The Florida Scrub Lizard (Sceloporus woodi) is endemic to Florida, where it inhabits fragments of xeric sandhill uplands including endangered long-leaf pine and sand pine scrub habitats. Lizards depend on a predictable range of temperatures to maximize their growth and productivity, and to do so, they shuttle among various thermal micro-environments. Thus, the spatial distribution of temperatures in the habitat is important. Habitats dominated by either high or low extremes of an organism’s preference are energetically costly and dangerous (less optimal), especially to gravid females. This study examines thermal preference of a near-threatened species that also inhabits increasingly rare habitats. …