Digital Commons Network^™

Environmental Enrichment Reduces Cue-Induced Reinstatement Of Heroin-Seeking Following Prolonged Use And Reverses Region-Specific Heroin-Induced Neuroadaptations, Apoorva Vashisht

Dissertations, Theses, and Capstone Projects

Background: Relapse remains the greatest barrier to long-term recovery and the consequential rising overdose-related mortality in heroin use disorder (HUD). Currently available behavioral and pharmacological interventions fail to extend their benefits beyond the duration of the treatment. Additionally, opioid agonist-based medications accompany harmful neurobiological risks and propensity to promote further drug-seeking post-treatment. We have shown that environmental enrichment (EE), as a therapeutic strategy applied after drug intravenous-self administration (IVSA), can effectively facilitate abstinence and reduce reinstatement of drug-seeking in animal models of drug abuse. Moreover, dopamine receptors like D1 and D3, and mu-opioid (MO) receptors are well known for their …

The Burden Of Burnout: Understanding Its Prevalence And Organizational Drivers In Medical Physics, Deborah Schofield, C Lynn Chevalier, Laurence Court, William Harmsen, Akiva Turner

Faculty, Staff and Student Publications

Background: Burnout is a work-related syndrome characterized by increased levels of emotional exhaustion (EE) and depersonalization (DP) along with decreased levels of personal achievement. In the healthcare setting, higher burnout levels have been associated with negative impacts on personnel, an increased risk of errors, and a decrease in the quality of delivered care.

Purpose: The purpose of this study was to assess the prevalence of burnout among medical physicists working in the United States. Additionally, the impact of personal and organizational features on burnout risk was examined.

Methods: The anonymous survey was distributed to 1962 full members of the American …

75 | Cana Of Galilee: Excavations At Karm Er-Ras 1999–2011, Yardenna Alexandre

IAA Reports—Monograph Series of the Israel Antiquities Authority

This volume describes the results of multiple small-scale salvage excavations that took place at the site of Karm er-Ras in the Lower Galilee between 1999 and 2011. Archaeological remains of ten strata were revealed, dating from Iron Age II to the Byzantine period, including architecture, pottery, glass, coins and special finds. The archaeological data reveals the history of settlement of this site, and its changing ethnic and religious affinities over some 1500 years. Following detailed analysis of the archaeological data and the literary sources, the author argues for the identification of the Roman-period village at Karm er-Ras with ‘Cana of …

Dynamic Environments Generate Geographic Fluctuations In Population Structure Of An Inland Shorebird, Andrea Contina, Scott W. Yanco, Allison K. Pierce, Hannah B. Vander Zanden, Craig A. Stricker, Gabriel J. Bowen, Michael B. Wunder

School of Integrative Biological & Chemical Sciences Faculty Publications

Species distributions depend on fine-scale ecological processes and population growth trajectories and are influenced by climate and weather changes. However, the characterization of inter-population dynamics underlying the geographic distributions of migratory organisms remains challenging. We adopted a stable isotope approach to investigate the dynamic population geography of a terrestrial migratory bird across multiple generations. We found that the age-specific geographic source of Mountain Plovers sampled during winter shifted over four years across a latitudinal gradient. Moreover, our results show that differential effects of climate on the probability of occurrence at the wintering ground could be a driver of population turnover …

Rapid Riparian Ecosystem Decline In Rocky Mountain National Park, David J. Cooper, E William Schweiger, Jeremy R. Shaw, Cherie J. Westbrook, Kristen Kaczynski, Hanem Abouelezz, Scott M. Esser, Koren Nydick, Isabel De Silva, Rodney Chimner

Michigan Tech Publications

Understanding the drivers of ecosystem collapse is critical for resource management, particularly for protected areas mandated to preserve biodiversity. In Rocky Mountain National Park, Colorado, tall willows (Salix spp.) dominated riparian vegetation, and a beaver-willow state was the natural ecosystem type in the Colorado River headwaters. However, willows comprise a portion of elk diets and are a preferred food for recently introduced moose, and the vegetation structure has changed dramatically since the early 2000s. To assess ecosystem changes, we analyzed time-series data on willow height from 1997 to 2021 inside and outside 3 exclosures built to exclude ungulates, area of …

Ecospiritual Entanglement, Ali Vedad Yüner

Masters Theses

Land breeds culture. It gives us the resources to thrive, and in that process we establish a relationship with its constituents. With a multitude of beings inhabiting the land, a complex web of relationships develop. Biology describes these relationships as food webs; the mass entanglement of organisms in a manner that each organism nourishes the other. These webs are not just mere scientific structures but rather an interpretation of existential connections that every organism in the world, humans included, are indebted to. Food webs are the first stepping stone in the formation of culture, as they account for the engagement …

Covered In Snow, Katelynn M. Rogers

Masters Theses

Covered in Snow is a photographic exploration into the ripple effect of maternal loss and environmental decay in my hometown of Canton, Ohio. In the wake of a miscarriage, the woods I had grown up within began calling to me, urging me to return. Unbeknownst to me, a series of accidental deaths of women had been happening throughout these trees my entire life, their stories only coming to the surface as I looked to the trees for solace. This series of inexplicable deaths in the woods I so desperately loved began to alter my relationship to the trees, a distrust …

Field Journal: The Excluded Middle, Carrie E. Kouts

Masters Theses

What does it look like to engage with organisms and landscapes at the periphery of anthropocentric value structures? How does one break the internalized myth that the “built” environment is excluded from the natural world? When does a hyper-mobile and hyper-commodified society confront the exponential crisis of animal death? Within this series of journal entries, field notes, collection observations, weird prose, and sensory musings, one will find questions on the nature of being human and the complex narratives of care we encounter in a world shared with more-than-humans. Each handwritten vignette and photograph from daily life weaves a non-linear and …

Size Reduction Southward In Michigan's Mustard White Butterfly, Pieris Napi (Lepidoptera: Pieridae), W. H. Wagner Jr., Michael K. Hansen

The Great Lakes Entomologist

[Excerpt]

The mustard white, Pieris napi (Linnaeus) is generally considered to be a circumboreal species or species-complex. Much disagreement exists regarding the classification in this group, the members of which are extremely diverse, especially in Eurasia. There is evidently "a continuous range of differentiation, from local populations, through subspecies, to species, which nomenclature cannot fully reflect" (Bowden 1972). In North America the major controversy has been whether the so-called West Virginia white, P. virginiensis Edwards, should be separated as a distinct species. Most writers today agree that it should. Of the mustard white in the Great Lakes area, the local …

The Influence Of Geographic Ranges, Climatic Niches And Temperature Fluctuations On Population Variability, Cleber Ten Canten, Lauren Holian, Tad Dallas

Faculty Publications

The existence of patterns in population dynamics across species geographic ranges and climatic niches is a pervasive idea in ecology. Population variability (i.e. temporal variability in population density) should hypothetically increase near range edges or niche limits because of less suitable environments in these areas, but the occurrence of such patterns remains largely unexplored. Further, fluctuations in temperature could pose demographic constraints on populations and also influence their variability. We used Breeding Bird Survey data to show that the population variability of 97 resident North American birds consistently increases towards their niche limits and in areas with more variable temperatures, …

Discovery Of Anisobas Irwini Claridge, New Species, And New Host And Distribution Records Of Anisobas Coloradensis (Cresson) (Hymenoptera: Ichneumonidae: Ichneumoninae: Ichneumonini), Brandon R. Claridge, Kyri A. Forman

Insecta Mundi

Anisobas Wesmael (Hymenoptera: Ichneumonidae: Ichneumoninae: Ichneumonini) is a moderately diverse parasitoid wasp genus present in the Holarctic and Indo-Malaysian regions. Here, we advance taxonomic knowledge of western Nearctic Anisobas by documenting new rearing and distribution records for A. coloradensis (Cresson) and describe A. irwini Claridge, new species, from central Arizona. There are now seven known Nearctic Anisobas species.

Advancing Butterfly Systematics Through Genomic Analysis, Jing Zhang, Qian Cong, Jinhui Shen, Leina Song, Nick V. Grishin

The Taxonomic Report of the International Lepidoptera Survey

Within the framework of an ongoing comparative genomic study of global butterfly diversity, we construct phylogenetic trees combining all protein-coding genes assembled from the whole genome shotgun data. When viewed in the context of current taxonomy and phenotypic knowledge, the genome-wide phylogeny points to further advances in butterfly systematics, which are presented here. We assign major clades with comparable levels of genetic divergence to the same taxonomic rank and apply criteria involving relative population divergence and gene flow to define species boundaries. As a result, one genus, 13 subgenera, 62 species, and five subspecies are proposed as new (type species …

Factors Impacting The Variability Of Post-Fire Forest Regeneration In Central European Pine Plantations, Florent Jouy, Maren Schüle, Yojana Adhikari, Anja Binder, Danica Clerc, Werner Gerwin, Thilo Heinken, Thomas Raab, Frank Repmann, Susanne Rönnefarth, Marina Schirrmacher, Marie-Therese Schmehl, Jens Schröder, Pierre L. Ibisch

Aspen Bibliography

Fire is increasingly posing a risk to forests and plantations, even in the temperate latitudes of central Europe. Little is known about fire ecology in this region, and therefore, appropriate approaches for the management and reforestation of burned sites are mostly lacking. In a Scots pine plantation region in Brandenburg (northeast Germany), the early tree regeneration of two nearby areas that burned 1 year apart was investigated. We observed that 3 years after the fire events, the forest in one study area showed a relatively high regeneration with a mean density of 7765 saplings/ha, clearly dominated by European aspen (93%); …

Pollinator Plant Communities Within Restored Montane Longleaf Pine Ecosystems, Hanen Van Rossem

Master's Theses

Historically the fire-dependent and biodiverse longleaf pine (Pinus palustris) ecosystem was the dominant ecosystem of the Southeastern US. This ecosystem’s range was massively reduced due to land conversion and fire exclusion, causing the decline of many native species. Efforts to restore and protect longleaf pine stands are now ongoing with the goal of expanding habitat and refuge for threatened species. Differences in restoration practices and prior land use may influence the extent to which restored habitat patches can support pollinators and their plants. This study compared pollinator plant biodiversity between restored neighboring montane longleaf pine stands that differed in …

A Phylogenomic Investigation Of The Historical Biogeography Of Livebearers (Cyprinodontiformes: Poeciliidae), Sheila Rodríguez Machado

LSU Doctoral Dissertations

The Neotropics contain several biodiversity hotspots and harbor the highest diversity of freshwater fishes globally. Yet, recognizing the patterns and processes driving this richness remains a challenge. Similarly, all groups and subregions have not received the same attention, especially in the genomics era. Addressing these knowledge gaps will help us to better understand the region’s evolutionary and biogeographic complexity. The goal of this dissertation is to examine phylogenetic and biogeographic patterns of Neotropical freshwater fishes, with emphasis on the Greater Antilles, across multiple taxonomic and geographic scales. To achieve this goal, I generated a genomic dataset of hundreds of ultraconserved …

Assessing The Contribution Of Geography And Host Use To Genetic Structure In New York Populations Of The Parasitoid Wasp, Aphidius Ervi, Haley J. Plasman, David M. Althoff

The Great Lakes Entomologist

Host-associated differentiation (HAD) been proposed as a general mechanism for differentiation of many groups of parasitic organisms including plant-feeding insects and their natural enemies. In particular, parasitoid wasps that attack herbivorous insects have many life habits similar to other parasitic taxa, suggesting that HAD also may be important in differentiation. We tested for the population genetic signature of HAD in a parasitoid wasp, Aphidius ervi (Haliday), a biocontrol agent that uses many species of aphids throughout Europe, but is mainly limited to the clover and alfalfa host-races of the pea aphid Acyrthosiphon pisum (Harris) in North America. We assessed allelic …

Climate Resilience For Organic Vegetable Growers In The Midwest: Views, Needs, And Priorities Of Technical Service Providers, Natalie Hoidal, Greta Gramig, James Dedecker, Nicholas Frillman, Katie Black, Sarah Hayward, Rue Genger

Journal of Extension

As organic vegetable production becomes increasingly important in Upper Midwest food systems, Extension programs and partners must rise to the challenge of supporting growers with climate resilience. These growers are uniquely vulnerable to climate impacts, and addressing this challenge requires a networked approach. We report on a needs assessment and social network analysis process with technical service providers across the region to define the challenges, needs, and opportunities for building individual and institutional capacity to address climate change with growers. Results highlighted several focus areas, including improved communication, better access to funding, sound information, and cultural appropriateness.

Quantifying 14 Years Of Restoration Impact At A Los Angeles Park Using Remote Sensing, Alexa Siglar, Demian A. Willette

Honors Thesis

Ascot Hills Park is an urban park in the El Sereno neighborhood of east Los Angeles that has undergone continuous restoration efforts to reintroduce California native trees and shrubs from 2011-2025. This study seeks to understand how a 14 year period of continuous restoration by a variety of stakeholders has changed the park by asking the following question: How has native plant cover changed over time? To answer this question, the change in percent native plant cover at the park from 2011-2025 was quantified using satellite imagery and machine learning software in ArcGIS Pro. Satellite images and ArcGIS Pro were …

Remotely Sensed High-Resolution Soil Moisture And Evapotranspiration: Bridging The Gap Between Science And Society, Jingyi Huang, Vinit Sehgal, Laura V. Alvarez, Luca Brocca, Shuohao Cai, Rui Cheng, Xinghua Cheng, Jinyang Du, Bassil El Masri, K. Arthur Endsley, Yilin Fang, Jie Hu, Mahesh Jampani, Md Golam Kibria, Gerbrand Koren, Lingcheng Li, Laibao Liu, Jiafu Mao, Hernan A. Moreno, Angela Rigden, Mingjie Shi, Xiaoying Shi, Yaoping Wang, Xi Zhang, Joshua B. Fisher

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

This paper reviews the current state of high-resolution remotely sensed soil moisture (SM) and evapotranspiration (ET) products and modeling, and the coupling relationship between SM and ET. SM downscaling approaches for satellite passive microwave products leverage advances in artificial intelligence and high-resolution remote sensing using visible, near-infrared, thermal-infrared, and synthetic aperture radar sensors. Remotely sensed ET continues to advance in spatiotemporal resolutions from MODIS to ECOSTRESS to Hydrosat and beyond. These advances enable a new understanding of bio-geo-physical controls and coupled feedback mechanisms between SM and ET reflecting the land cover and land use at field scale (3–30 m, daily). …

Climate Constrains The Enhancement Of Co2 Fertilization On Forest Gross Primary Productivity, Xinyuan Wei, Daniel J. Hayes, Christopher R. Schwalm, Joshua B. Fisher, Deborah N. Huntzinger, Lei Ma, Rodrigo Vargas, Nathaniel A. Brunsell

Mathematics, Physics, and Computer Science Faculty Articles and Research

Forest gross primary production (GPP) is influenced by the interplay between climate conditions and atmospheric CO₂ levels, which interact in complex ways, generating both compensating and amplifying effects. In this study, eddy covariance flux measurements from 50 forest ecosystems were integrated with simulations from 14 terrestrial biosphere models to investigate how climate conditions and atmospheric CO₂ concentrations regulate forest GPP. This approach bridges site-level observations with biome-scale model estimates to develop a global understanding. Our findings suggest that in boreal and cold temperate regions, temperature primarily constrains the enhancement of the CO₂ fertilization on forest GPP; however, …

Exploring The Landscape Of Animal Advocacy In Egypt: Insights Into Stray, Wildlife, And Farmed Animal Rights, Yara Moussa, Wasseem Emam

General - Animal Protection

This article examines the landscape of animal advocacy in Egypt, a nascent and growing field in one of Africa’s largest economies and most densely populated countries. It focuses on three types of animal advocacy: 1) stray animal welfare, 2) wildlife conservation, and 3) farmed animal welfare. The paper critically analyses current practices and trends in each of these areas, highlighting the main challenges and opportunities facing the growth of the movement. Our research draws on insights from interviews with active animal welfare organizations, situating their practical experiences, daily operational struggles, as well as instances of success, within Egypt’s wider socio-economic …

Temporal Assessment Of Fish Communities In A South Central Plains Ecoregion Watershed, Tara L. Schnelting

ATU Theses and Dissertations 2021 - Present

Among South Central Plains ecoregion fish communities, there is limited knowledge of the importance of headwaters yet this information is needed to understand their role in fish communities. I addressed this gap by assessing seasonal changes in fish communities in headwater streams of the Moro Creek watershed, Arkansas. I conducted two studies pertaining to temporal fish community assessments: (i) utilize multi-season, community occupancy models to estimate μ (species probability), Ω (community occupancy mean), and p (detection probability) and (ii) utilize beta diversity (β) analyses to address the diversity across different scales in the headwaters of the Moro Creek …

Comparative Three-Barcode Phylogenetics And Soil Microbiomes Of Planted And Wild Strawberry Trees., Flannery Mclamb, Armando Vazquez, Natalie Olander, Miguel F. Vasquez, Zuying Feng, Niharika Malhotra, Liisa Bozinovic, Karen Najera Ruiz, Katherine O'Connell, Joseph Stagg, Goran Bozinovic

Center for Life in Extreme Environments Publications

Taxonomic identification of closely related plants can be challenging due to convergent evolution, hybridization, and overlapping geographic distribution. To derive taxonomic relationships among planted and wild plants across a large geographic range, we complemented three standard plastid barcodes , , and with soil and fruit chemistry, soil microbiome, and plant morphology analyses. Soil and plant sampling included planted from manicured sites in Southern California, USA, wild plants from Southern and Northern California, and wild populations from Mediterranean island of Hvar, Croatia. We hypothesized that phenotypic variation within and between sites correlates with plants' genotype and geographic distribution. Similar fruit chemistry …

Mechanisms Of Protective Humoral Immunity And Pathogenesis In Alphavirus Infection, Natasha Monir Kafai

Arts & Sciences Graduate Student Theses and Dissertations

Alphaviruses are enveloped, mosquito-transmitted, positive-sense RNA viruses of the Togaviridae family classified into Old and New World groups based on endemic regions and human disease characteristics. Old World alphaviruses, including chikungunya virus preferentially cause arthritogenic disease, whereas New World viruses like Venezuelan equine encephalitis virus (VEEV), Eastern equine encephalitis virus (EEEV), and Western equine encephalitis virus (WEEV) can cause neurological disease. Since the 1920s, VEEV has been responsible for major periodic outbreaks affecting hundreds of thousands of humans and equines in South and Central America. Expansion of mosquito vectors raises concern for possible VEEV reemergence. In addition, VEEV is a …

The Relationship Between Food Allergies And Intolerances And The Development Of Disordered Eating Patterns, Lucy M. Scholma

Human Nutrition and Hospitality Management Undergraduate Honors Theses

Food allergies and food intolerances are becoming an increasingly more prevalent issue in the Unites States. To mitigate adverse reactions, these individuals often eliminate food or food groups from their diets and the ramifications of these lifestyle changes may result in disordered eating patterns. In regard to food allergies and intolerances and eating disorders, it is reasonable to suggest that the overlapping lifestyle choices and physical, social, and emotional ramifications may lead to a correlation between the two phenomena. This study explores the relationship between food allergic and food intolerant individuals and disordered eating habits among college students. Survey results …

Frontier Healthscapes: Competing Narratives Of Disease, Environment, And Wellbeing In Early Minnesota, Aidan Reynolds

Geography Honors Projects

Across settler societies, health narratives were shaped by evolving tensions between lay and expert knowledge, frameworks of disease causation, and perceptions of the environment as both a source of health and a threat. In the decades following Euro-American settlement (1860-1900), Minnesota became a focal point for these debates, with its landscape fostering complex and competing narratives on health, wellbeing, and disease. This paper explores how public health discourse developed in Minnesota through the perspectives of institutions, the public, and economic interests. Combining environmental history with critical discourse analysis of archival materials, this study examines shifts within the Minnesota State Board …

Cultural Health Benefits And Challenges Of Food Preparation And Consumption: A Comparative Study Of The United States, Italy, And Norway, Natalie G. Link

Undergraduate Honors Thesis Collection

This study aims to investigate the cultural health benefits and challenges associated with food preparation and consumption in the United States, Italy, and Norway, with a particular focus on citizens in lower socioeconomic levels. By examining the dietary habits, social structures, and health outcomes in these three countries, this research aims to uncover broader insights into the health status and well-being of their respective populations. The study will employ secondary data analysis approach examining existing research on cultural practices and social support systems. The findings of this research will contribute to a deeper understanding of the complex interplay between food …

Sympatric Behavior Of Tree Squirrels In An Urban Environment, Ryan L. Snyder

Undergraduate Honors Thesis Collection

The eastern gray squirrel (Sciurus carolinensis) and fox squirrel (Sciurus niger) are ubiquitous in urban ecosystems like university campuses despite the habitat loss and fragmentation often associated with urbanization. While populations of both species usually do not overlap in their native geographic ranges, gray and fox squirrels are sometimes forced into coexistence in urban habitats where fewer green spaces are available. The coexistence of both species at Butler University in Indianapolis, Indiana refutes the competitive exclusion principle, and niche partitioning is likely necessary for them to coexist. This study assessed the activity patterns of fox and gray squirrels at Butler …

Soil-Based Emissions And Context-Specific Climate Change Planning To Support The United Nations (Un) Sustainable Development Goal (Sdg) On Climate Action: A Case Study Of Georgia (Usa), Davis G. Nelson

All Theses

Soil-based emissions from land conversions are often overlooked in climate planning. The objectives of this study were to use quantitative data on soil-based greenhouse gas (GHG) emissions for the state of Georgia (GA) (USA) to examine context-specific (temporal, biophysical, economic, and social) climate planning and legal options to deal with these emissions. Currently, 30% of the land in GA has experienced anthropogenic land degradation (LD) primarily due to agriculture (64%). All seven soil orders were subject to various degrees of anthropogenic LD. Increases in overall LD between 2001 and 2021 indicate a lack of land degradation neutrality (LDN) in GA. …

Application Of Remote Sensing In Mapping Callery Pear Distribution And Biomass Estimation In The Southeastern United States, Kavi Raj Awasthi

All Theses

Callery pear (Pyrus calleryana Decne. Rosaceae) is a rapidly spreading invasive species in the southeast United States (US) that hampers the function of native tree species and the forest ecosystem. Native to Southeast Asia, the species has encroached on the natural and secondary vegetation habitats of the Southern US in recent years. This study attempted to 1) map the Callery pear across the southeast US and 2) model the aboveground biomass (AGB) of individual Callery pear trees.

We used Callery pear locations and winter imageries of Sentinel-2, Sentinel-1, L-band radar, and terrain imagery for mapping purposes. In addition, we …