Digital Commons Network^™

On The Ecological Impact Of Prehistoric Hunter-Gatherers In Europe: Early Holocene (Mesolithic) And Last Interglacial (Neanderthal) Foragers Compared, Anastasia Nikulina, Anhelina Zapolska, Maria Antonia Serge, Didier M. Roche, Florence Mazier, Marco Davoli, Elena A. Pearce, Jens Christian Svenning, Dave Van Wees, Ralph Fyfe, Katharine Macdonald, Wil Roebroeks, Fulco Scherjon

School of Geography, Earth and Environmental Sciences

Recent studies have highlighted evidence of human impact on landscapes dating back to the Late Pleistocene–long before the advent of agriculture. Quantifying the extent of vegetation transformations by hunter-gatherers remains a major research challenge. We address this challenge by comparing climate-based potential natural vegetation cover with pollen-based vegetation reconstructions for the Last Interglacial and the Early Holocene. Differences between these datasets suggest that climate alone cannot fully explain the pollen-based vegetation patterns in Europe during these periods. To explore this issue, we used an upgraded version of the HUMan impact on LANDscapes (HUMLAND) agent-based model (ABM), combined with a genetic …

Epidemiology Of Lower Extremity Amputations In The United States: An Analysis Of The Global Burden Of Disease Database From 1990 To 2019, Peter B. Spencer, Cameron J. Sabet, Gabrielle Dykhouse, Taylor Manes, Phillip C. Mckegg, Ambrose Loc T. Ngo, Ayah Ibrahim, Jack W. Weick

Student Publications

Background: Lower extremity amputations (LEAs) are medically, psychologically, and functionally devastating. The objective of our study was to evaluate region- and sex-specific differences of unilateral and bilateral LEAs across the United States (US) from 1990 to 2019.

Methods: The Global Burden of Disease database was used to analyze years lived with disability (YLDs), prevalence, and incidence rates per 100,000 people for LEAs in the US from 1990 to 2019. Data were stratified into four US Census Bureau-defined regions: Northeast, Midwest, South, and West. Differences between regions and sexes were assessed, with statistical significance defined as p < 0.05.

Results: From 1990 to …

Home Range Size And Habitat Usage Of Hatchling And Juvenile Wood Turtles (Glyptemys Insculpta) In Iowa, Jeffrey W. Tamplin, Joshua G. Otten, Samuel W. Berg, Nadia E. Patel, Jacob B. Tipton, Justine M.R. Radunzel

Faculty Publications

The Wood Turtle (Glyptemys insculpta) is an endangered species in the state of Iowa and a species of conservation concern across their entire range. The Iowa population is characterized by high levels of adult and egg predation, displays little or no annual recruitment, and harbors an extremely low number of juveniles (7.3%). Home range and habitat usage studies of hatchling and juvenile Wood Turtles are limited to a few studies, and only one study of juveniles exists from the state of Iowa. Over a 10 yr period, we conducted a radiotelemetry study in Iowa on seven juvenile wood turtles for …

Soil Ph Analysis Of Pig Decomposition In Southeast Nebraska, Camryn Nelson, William Belcher

Beyond: Undergraduate Research Journal

This study investigated the effects of a decomposing pig carcass on soil pH in the tallgrass prairie ecosystem of Southeast Nebraska, using pigs as proxies for human decomposition. The experiment spanned 171 days, encompassing decomposition stages from fresh to advanced decay. Soil samples were collected at regular intervals from four cardinal directions (north, east, south, west) and distances (0, 33, 66, and 100 cm) from the carcass to analyze changes in pH over time. Results indicated that decomposition significantly influenced soil pH, with the most dramatic changes occurring on the south side of the carcass, where the pig burst. pH …

Recent Literature, Claire Stuyck

North American Bird Bander

No abstract provided.

Full Issue, North American Bird Bander

North American Bird Bander

No abstract provided.

From Peak To Plunge: A Multi-Database Analysis Of State-Level Disparities In Hydromorphone Use In The Us, Krisha S. Patel, Leana J. Pande, Kenneth L. Mccall, Brian J. Piper

Pharmacy Faculty Scholarship

Background: Hydromorphone is a semi-synthetic opioid agonist and a hydrogenated ketone of morphine. This study examined hydromorphone use in the United States (US) using three databases. Methods: The distribution of hydromorphone in the US (in grams) was provided by the US Drug Enforcement Administration’s Automated Reports and Consolidated Orders System (ARCOS) by state, zip code, and business type (pharmacies, hospitals, providers, etc.). Hydromorphone prescription claims were also examined using the Medicaid and Medicare Part D programs from 2010 to 2023. Results: Hydromorphone increased by +30.6% by 2013, followed by a decrease of −55.9% by 2023 in ARCOS. Medicaid prescriptions increased …

Feeding Niche Overlap And Segregation Among Three Grouse Species Wintering In Hudson Bay Lowlands Of Northern Ontario, Vernon G. Thomas

Ontario Birds

The Hudson Bay Lowlands of northern Ontario (comprising tundra and taiga) provide winter habitats for Willow Ptarmigan and Sharp-tailed Grouse as well as Rock Ptarmigan that occasionally fly in from arctic and subarctic regions. Winter food niche segregation/overlap was measured among these three species to investigate potential feeding competition; tamarack and berries were quantified by number and mass in the crops of grouse collected from the vicinity of the former community of Winisk, Ontario (now Peawanuck). All grouse species fed on birch and it was the principal food for Sharp-tailed Grouse. Willow was eaten primarily by Willow and Rock Ptarmigan. …

From Deforestation To Regeneration: Modeling The Potential Of Chakra Agroforestry To Restore Edaphic Invertebrates And Soil Health In The Ecuadorian Amazon, Annika Vikstrom

Ecuador: Comparative Ecology and Conservation

Tropical edaphic invertebrates lie at the intersection of three historically understudied domains: tropical habitats, soil ecosystems, and terrestrial invertebrate biodiversity (Boyle et al. 2024; Lugo et al., 2024). Approximately 80% of tropical invertebrates remain undescribed, leaving major gaps in the understanding of how land-use change and climate change may affect their diversity and ecological function. The Amazon Basin, one of the world’s most biologically and culturally diverse regions, is increasingly threatened by land use change and deforestation. While agriculture is the second main driver of forest conversion in the basin, Indigenous Agroforestry systems such as Kichwa Chakras in the Ecuadorian …

District Vulnerability Index For Pakistan (Dvip): Harnessing Multisectoral Data To Inform Equitable Policy And Climate Action, Population Council

Climate and Environmental Changes

Pakistan’s highly heterogeneous population faces significant development challenges, including unequal resource distribution and disparities in access to services, which create varying levels of vulnerability across communities. While existing studies have primarily examined vulnerability through climate, economic, or other disaster lenses, they often overlook underlying structural and systemic factors. This study aims to address that gap by developing an index that incorporates domains of vulnerability typically underrepresented in analyses of Pakistan.

Why Antimicrobial Resistance Pipelines Fail On Cyanobacteria: What Custom Databases Reveal Instead, Maeve Musselman

Australia: Rainforest, Reef, and Cultural Ecology

Harmful cyanobacterial blooms (C-HABs) are increasing as climate change and nutrient enrichment create favorable environments for cyanobacteria. Although bloom-forming cyanobacteria can persist in extreme and polluted conditions, and antimicrobial resistance (AMR) and metal resistance (MR) play significant roles in bloom persistence and response to treatments, both remain understudied. Currently, most AMR detection pipelines use clinical databases developed for human pathogens which routinely fail to detect resistance genes in environmental microbes. This study evaluated AMR and MR profiles in seven freshwater cyanobacteria using both clinical AMR pipelines (CARD, ResFinder, ARG-ANNOT) and a custom environmental resistance database specifically designed to include metal …

Piping Up: Exploring Body Length And Density Metrics Of Dominant Pipefish Species Urocampus Carinirostris Across Spatially Distinct Sites In Moreton Bay, Qld, Leah Esser

Australia: Rainforest, Reef, and Cultural Ecology

The morphologically unique family Syngnathidae faces high levels of anthropogenic pressures in Moreton Bay Marine Park where seagrass beds, habitat to many syngnathid species, are increasingly vulnerable. Among these species, the pipefish Urocampus carinirostris is especially prevalent, making it a strong candidate as an indicator and model species. Threats to seagrass, including pollution and nutrient overload, largely stem from sources on the bay’s western banks. This study aimed to conduct a preliminary investigation of how U. carinirostris size, density, and site-level pipefish diversity compares across locations, with particular attention to differences between eastern and western sites. An exploratory comparison between …

Resilience Engineering Via Bifurcation And Ecological Network Analysis: Demonstrated In An Electric Power Case Study, Rogelio Gracia Otalvaro

Doctoral Dissertations and Master's Theses

Modern systems are increasingly complex, interconnected cyber-physical systems that combine digital controls with physical infrastructure. This integration, along with the constant introduction of new technologies and actors into the network, enables reliable operation but introduces vulnerabilities to unexpected and varied disruptions and cascading failures, making resilience a critical concern. Traditional risk management and resilience assessment methods often struggle with the nonlinearity and dynamic behavior of these systems. This dissertation proposes a novel approach combining Bifurcation Analysis (BA) and Ecological Network Analysis (ENA) to enhance the understanding and improvement of system resilience. BA, a mathematical method from dynamical systems theory, is …

Epidemiology Of Lower Extremity Amputations In The United States: An Analysis Of The Global Burden Of Disease Database From 1990 To 2019., Peter B Spencer, Cameron J Sabet, Gabrielle Dykhouse, Taylor J Manes, Phillip C Mckegg, Ambrose Loc T Ngo, Ayah Ibrahim, Jack Weick

Surgery Articles

BACKGROUND: Lower extremity amputations (LEAs) are medically, psychologically, and functionally devastating. The objective of our study was to evaluate region- and sex-specific differences of unilateral and bilateral LEAs across the United States (US) from 1990 to 2019.

METHODS: The Global Burden of Disease database was used to analyze years lived with disability (YLDs), prevalence, and incidence rates per 100,000 people for LEAs in the US from 1990 to 2019. Data were stratified into four US Census Bureau-defined regions: Northeast, Midwest, South, and West. Differences between regions and sexes were assessed, with statistical significance defined as p < 0.05.

RESULTS: From 1990 to …

Community Firearm Violence And Dental Care Use In Middle Adulthood, Alexander Testa, Luis Mijares, Daniel Semenza, Richard Stansfield, Ian Silver, Dylan B Jackson, Ana Neumann, Jeff R Temple, Rahma Mungia

Faculty, Staff and Student Publications

Prior research links violence inside the home to reduced dental care utilization, yet little is known about how community firearm violence affects dental care behaviors. The current study used data from wave V (2016-2018) of the National Longitudinal Study of Adolescent to Adult Health (Add Health), linked to census tract-level fatal and nonfatal shooting data from the American Violence Project for the 100 largest cities in the United States. The analytic sample included 1925 respondents aged 33-42. The primary outcome was self-reported dental care use in the past year. Firearm violence exposure was categorized as 0, 1, or 2 + …

Systemic Resilience: Covid-19 And Healthcare Quality In Acute Myocardial Infarction At Tertiary Medical Centers – A Nationwide Study From Taiwan, Shih-An Liu, Sheng-Hui Hung, Chih-Hung Ku, Yan-Ru Wang, Ching-I Chang, Pa-Chun Wang

Journal of Health Research

Background: The COVID-19 was a pandemic once in a century. This study aimed to review the quality of acute myocardial infarction (AMI) care during the COVID-19 pandemic from a national perspective.

Methods: A retrospective analysis was conducted using Joint Commission of Taiwan (JCT)’s national Taiwan Clinical Performance Indicator (TCPI) system AMI care data, in correlation with Taiwan Centers for Disease Control COVID-19 epidemiological information. The time frames of the current study were categorized into four periods, based on the four levels of epidemic prevention and response established by the Central Epidemic Command Center (CECC). Quality indicators among different periods were …

Trophic Niche Overlap Between Native And Alien Fish Species: A Challenge For The Aquatic Ecosystems, Rana Manzoor Ahmad, Abdul Majid Khan, Mariya Basharat, Muhammad Rizwan, Neelam Shahzadi, Muhammad Imran

Journal of Bioresource Management

The different physiological and biological challenges are introduced not only on land but also in aquatic ecosystems due to increasing climatic changes and human needs. One of these challenges is the introduction of invasive alien species to the native freshwater ichthyofauna. These species not only disturb the ecological balance of the native water bodies but can also be a vector for parasitic diseases. The current study is designed to disclose the trophic niche overlap among exotic (Cyprinus carpio and Oreochromis mozambicus) and indigenous fish species (Labeo calbasu and Cirrhinus mrigala) from Head Baloki (Ravi River), Punjab, …

Environmental Controls On Planktonic Community Variability And Ecosystem Responses In The Romanian Black Sea, Cristina Tabarcea, Elena Bișinicu, George-Emanuel Harcotă, Aurelia Țoțoiu, Oana Vlas, Elena Pantea, Luminita Lazar

Turkish Journal of Zoology

This study examines the structure, distribution, and environmental influences on planktonic communities in the Romanian Black Sea, based on data collected from Black Sea national monitoring stations in June 2023. We assessed the qualitative and quantitative composition of phytoplankton, microzooplankton, mesozooplankton, macrozooplankton, and ichthyoplankton, alongside key environmental factors such as temperature, salinity, dissolved oxygen, and nutrient concentrations (nitrite, nitrate, ammonium, phosphate, and silicate). The results highlight the dominance of dinoflagellates within the phytoplankton community, while copepods constitute the most abundant mesozooplankton group. Species from the Codonellidae family mainly represent microzooplankton diversity, while macrozooplankton is largely dominated by the scyphozoan Aurelia …

Species Delineation, Phylogeography And Conservation Of Temperate Perches (Actinopterygii: Percichthyidae) From An Endemism And Climate Change Hotspot, Michael P. Hammer, David L. Morgan, Stephen J. Beatty, Mark G. Allen, Peter J. Unmack, Sean J. Buckley, Luciano B. Beheregaray, Jon Murphy, Mark Adams

Research outputs 2022 to 2026

Context: The south-western corner of Australia is a biodiversity hotspot that includes a freshwater fauna with a high proportion of endemic species. The temperate perches comprise nearly half of the obligate freshwater fishes of the region, representing important components of local ecosystems and are of significant conservation concern. Aims: Provide a spatially comprehensive molecular genetic assessment of species boundaries and major substructure for all local members of the family to better understand the interplay of ecology and environment across a common landscape. Methods: Nuclear markers (allozymes) and matrilineal (cytb) datasets were generated to infer genetic groupings and any instances of …

Religiosity And Attitudes Toward Suicide Among Filipinos, Marc Eric S. Reyes, Therese Angelie C. Daluping, Omar Joseph Sj. Dela Cruz, Sigmund Gabriel A. Estremadura, Jonah Emmanuel D. Gavino, Elaine G. Villanueva, Alvin L. Jacob Iii

Makara Human Behavior Studies in Asia

Religiosity is generally negatively associated with attitudes toward suicide. Religious individuals typically have more negative attitudes toward suicide than individuals with lower levels of religiosity. This is partly due to the belief that suicide goes against many religious teachings that revere life as a sacred gift from God. Hence, using a cross-sectional, predictive design, we aimed to investigate the link between religiosity and suicide attitudes and how much religiosity predicts different suicide attitudes. Using non-probability convenience sampling, 1148 Filipino participants aged 18–65 completed an online test battery: Centrality of Religiosity Scale Interreligious form-20 and Attitudes Toward Suicide Scale. Results revealed …

Initial Changes In Ground Beetle (Carabidae: Coleoptera) Assemblages After Creating Gaps Of Varying Sizes In Mature Northern Hardwoods Forests In Wisconsin, Robert A. Haack, Robert E. Acciavatti, Toby R. Petrice, Robert L. Davidson, Terry F. Strong

The Great Lakes Entomologist

Managers of northern hardwood forests in the Great Lakes region create gaps in the forest canopy of various sizes during harvesting to achieve different silvicultural objectives. Single-tree harvesting favors recruitment of shade-tolerant tree species by creating small gaps in the canopy, whereas group selection creates larger gaps that can favor shade-intolerant tree species. We evaluated changes in carabid beetle abundance and diversity in harvest-created gaps of five sizes (gap diameters of 6, 10, 20, 30, and 46 m) and uncut forests in northern Wisconsin where sugar maple (Acer saccharum) was the dominant tree species. Gaps were cut during …

A Content Analysis Of Prison/Custodial Suicide In Bangladesh, Anisur Khan, Rasel Hussain

Journal of Social, Behavioral, and Health Sciences

Suicide is the leading cause of death in prisons and custodial settings globally. International studies have consistently shown that prisoners and detainees are at a higher risk of suicide compared to the general population. Despite Bangladesh having a large prison population, there is no scholarly work on suicide within these settings. Against this backdrop, this study explored online newspaper content analysis capturing the characteristics of prison and custodial suicide in Bangladesh from 2014–2024. A total of 20 suicide cases were identified during this period. The data were arranged based on year-wise trends, age, sex, type of custody, nature of criminality, …

Predictors For Different Levels Of Covid-19 Vaccination Among Immigrant And Non-Immigrant Adults, Cheryl Zlotnick, Orit Cohen Castel

International Nursing Research Congress (INRC)

Overview: This study contributes to the literature by examining a comprehensive operationalization of vaccination status among working-age (21-49 years), immigrant and non-immigrant adults.

Background: The commonly used outcome, obtained any vaccination versus not, tends to overestimate COVID-19 vaccination utilization, distorting the associations found with covariates/predictors. More recent studies have used a three-variable COVID-19 status outcome of any, partial or complete vaccinations. However, they lacked a theoretical framework and focused on older and non-immigrant populations. This study examined working-age immigrants and non-immigrants, used the three-variable operationalization of COVID-19 vaccination, and was guided by Andersen’s Behavioral Model with its three factors …

Systematics And Phylogeography Of Mundochthonius Chamberlin, 1929, In The Pacific Northwest (Chelicerata, Pseudoscorpiones), Amanda Rai Montoya-Cowan

Dissertations and Theses

Understanding the processes that drive genetic divergence and species formation is central to evolutionary biology. Invertebrates with low dispersal ability, such as pseudoscorpions, are especially prone to cryptic diversification due to their occupancy of niche microhabitats and sensitivity to landscape barriers. Despite their ecological roles as predators and bioindicators, pseudoscorpions remain one of the least studied arachnid groups, with limited taxonomic resolution and few integrative studies. This research focuses on the genus Mundochthonius in the Pacific Northwest, particularly M. pacificus, a morphologically conserved species whose true diversity and distribution remain poorly understood.

Field surveys guided by a GIS-based habitat …

Prairie Soundscape, Rebecca J. Romsdahl

The Cicadian

This series of soundscapes represents dawn and dusk. Morning Cacophony was recorded at 6:00 AM, May 2023 on the Tympanuchus Reserve near Crookston, MN — a rare remnant prairie never plowed. Voices of the prairie: sedge wren, bobolink, greater prairie chicken, sandhill crane, red-winged blackbird, clay-colored sparrow. Night Chorus was captured at 2:00 AM, June 2024 on restored grassland at Bluestem Preserve near Moorhead, MN — once farmland, now thriving prairie. Nocturnal symphony: whip-poor-will (song + warning call), coyotes, treefrogs, grasshopper sparrow, soft wind, gentle rain.

Analysis Of Health Policy Impacts On Adolescent Tobacco And Alcohol Consumption In Asean: An Ecological Descriptive Study, Marzalyla Putri Hendriansyah, Syifa Azzahra Setiawan, Sabrina Aprilia Putri, Falah Nur Chusniati, Rizka Maulida

Journal of Indonesian Health Policy and Administration

The prevalence of tobacco and alcohol consumption among adolescents in Southeast Asia remains a public health concern despite the introduction of several national policies. This study assessed the relationship between policy implementation and consumption trends of tobacco and alcohol in selected ASEAN countries. Using a descriptive ecological design, we analyzed secondary data from the Global School-based Student Health Survey (GSHS) and policy documents from official government sources. We observed a rise in tobacco consumption in Indonesia (+4.2%) and Brunei (+5.5%), while Thailand experienced a slight increase (+0.3%). Conversely, alcohol consumption decreased marginally in Indonesia (-0.7%) and Brunei (-0.8%), but increased …

Gene Expression Of Anthocyanin Pigments In The California Native Plant Leptosiphon Parviflorus: Interactions Between Flower Color Morphology And Abiotic Stressors, Weston Gonor

Master's Theses

For plants to survive in harsh conditions imposed by abiotic stressors, they must develop mechanisms of adaptation. One of the common types of adaptation seen in plants is the production of anthocyanin pigments, which have been shown to protect plants from UV radiation, metabolic stress, and drought. In this study, we used the flower color polymorphic species Leptosiphon parviflorus to investigate the role of anthocyanin pigments in protecting plants from abiotic stress. To accomplish this, RNA samples were taken from flower, leaf and root tissue of different flower color morphs of Leptosiphon parviflorus (Polemoniaceae) grown in high magnesium and water …

Origin And Maintenance Of The Andean Bird Fauna, Elkin A. Tenorio

Dissertations, Theses, and Capstone Projects

The origin and maintenance of the tropical montane diversity have been evaluated over multiple decades using various techniques and perspectives. Despite major progress in understanding phylogenetic relationships, diversification patterns, distributional data, and general ecology in the Andean biota, large gaps in our understanding remain, particularly in the synthesis across scales. To fill these gaps, I aimed to explore patterns and processes that underlie species diversification in birds of the tropical Andes of South America by combining different approaches using phenotypic, phylogenetic, and genomic data in multiple temporal and spatial scales.

In the first chapter, I examined the macroevolutionary patterns of …

Bio-Acoustical Statistical Signal Processing For Detection, Classification, And Population Estimation In Wildlife Monitoring, Yue Liang

Doctoral Dissertations

Sound is a primary way for many animal species to communicate, forage, navigate, and assess their environment. As a result, passive acoustic monitoring (PAM), the recording and analysis of animal vocalizations, has become a valuable, non-invasive alternative to visual surveys. However, the massive volume of acoustic data generated annually, often reaching hundreds of terabytes, presents a significant challenge for efficient analysis. Since manual inspection of every frame in such data is infeasible, it is essential to develop automated detection and classification tools.

This thesis investigates and develops several statistical signal processing and machine learning techniques to address this challenge. The …

Evaluating Unoccupied Aerial Systems (Uass) For The Monitoring Of Unmarked Moose In New Hampshire, Usa, Lily Hall

Master's Theses and Capstones

Accurate estimates of wildlife densities are important for understanding population dynamics and informing management decisions. Recent technological developments such as improvements of unoccupied aerial systems (UASs) and sensors provide novel pathways to estimate wildlife densities. However, these methods require critical evaluation of efficacy. In this research, we evaluated the capability of UASs to predict moose (Alces alces) density across a large landscape (~12,000 km2) in northern New Hampshire, USA using longwave infrared imagery via UAS sampling. In Chapter 1, our objective was to account for imperfect detection by creating a sightability model for unmarked moose that includes covariates expected to …