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Articles 811 - 840 of 8612
Full-Text Articles in Entire DC Network
Morphometric Analysis And Taxonomic Re-Evaluation Of Pepsis Cerberus Lucas And P. Elegans Lepeletier (Hymenoptera: Pompilidae: Pepsinae: Pepsini), Frank E. Kurczewski, Akira Shimizu, Diane H. Kiernan
Morphometric Analysis And Taxonomic Re-Evaluation Of Pepsis Cerberus Lucas And P. Elegans Lepeletier (Hymenoptera: Pompilidae: Pepsinae: Pepsini), Frank E. Kurczewski, Akira Shimizu, Diane H. Kiernan
Insecta Mundi
Hurd (1952) separated Pepsis cerberus Lucas from P. elegans Lepeletier (Hymenoptera: Pompilidae: Pepsinae: Pepsini) based on external morphology and biogeography. Vardy (2005) synonymized the familiar and historically well-documented P. cerberus and P. elegans, combining these Nearctic taxa with several Neotropical variants in an extremely broad definition of P. menechma Lepeletier. In doing so, Vardy (2005) breached the principle of nomenclatural stability. He ignored the prevailing usage and clearly violated articles 23.2, 23.3 and 23.9.1.2 of the ICZN (1999). Morphological differences, ecological divergence, and narrow sympatric geographic distribution of P. cerberus and P. elegans …
Taxonomic Notes On Velvet Ants Of The Genus Timulla Ashmead, 1899 (Hymenoptera: Mutillidae) In The United States Of America And Canada, George C. Waldren
Taxonomic Notes On Velvet Ants Of The Genus Timulla Ashmead, 1899 (Hymenoptera: Mutillidae) In The United States Of America And Canada, George C. Waldren
Insecta Mundi
The exclusively New World velvet ant genus Timulla Ashmead, 1899 (Hymenoptera: Mutillidae: Mutillinae: Trogaspidiini) contains 180 species and ten subspecies. Most of these species are known from a single sex, and the validity of the subspecies has not been evaluated since their original description in 1937 and 1938. The Timulla fauna of the United States of America includes thirty species and eight subspecies, and the fauna of Canada includes three species. The faunas of these two countries were critically studied with the following results. Out of the eight total subspecies, seven were found to be structurally identical to and sympatric …
Vaccine Uptake And Intentions: Insights From A Texas Survey On Factors Influencing Covid-19 Vaccination Decisions, Yordanos M Tiruneh, Paula M Cuccaro, Kimberly S Elliott, Jing Xie, Journey Martinez, Mark Owens, Christian R Alvarado, Jose-Miguel Yamal
Vaccine Uptake And Intentions: Insights From A Texas Survey On Factors Influencing Covid-19 Vaccination Decisions, Yordanos M Tiruneh, Paula M Cuccaro, Kimberly S Elliott, Jing Xie, Journey Martinez, Mark Owens, Christian R Alvarado, Jose-Miguel Yamal
Faculty, Staff and Student Publications
The effectiveness of COVID-19 vaccines depends on widespread vaccine uptake. Employing a telephone-administered weighted survey with 19,502 participants, we examined the determinants of COVID-19 vaccine acceptance among adults in Texas. We used multiple regression analysis with LASSO-selected variables to identify factors associated with COVID-19 vaccine uptake and intentions to receive the vaccine among the unvaccinated. The prevalence of unvaccinated individuals (22%) was higher among those aged 18-39, males, White respondents, English speakers, uninsured individuals, those facing financial challenges, and individuals expressing no concern about contracting the illness. In a fully adjusted regression model, higher odds of being unvaccinated were observed …
Farmer's Adaptive Capacity And Adoption Of Strategies To Climate Change Among Mountain Communities In Nepal, Tanvir Hossain
Farmer's Adaptive Capacity And Adoption Of Strategies To Climate Change Among Mountain Communities In Nepal, Tanvir Hossain
LSU Master's Theses
Climate change presents significant challenges to agriculture worldwide, particularly where farming is central to livelihoods. This phenomenon has been linked to decreasing crop yields due to rising temperatures and reduced rainfall, particularly affecting low-income countries with limited adaptive capabilities. Grasping how farmers perceive climate change is essential for developing effective adaptation strategies to lessen its adverse impacts. This study concentrated on investigating the perceptions and adaptive strategies employed by smallholder farmers in Nepal's Mustang district, utilizing primary data sources. Data from 131 randomly selected households were gathered through structured interviews, while focus group discussions provided qualitative insights into farmers' views …
Du Undergraduate Showcase Abstracts: Research, Scholarship, And Creative Works, August Alexander, Kevin Summers, E. Paige Lloyd, Alyssa Aragon, Lauren Wols, Erica Larson, Colton Arciniaga, Lily Baeza, Ellie Barnett-Cashman, Sidney Barbier, Maverick Bartholomew, Ryan Bell, Trevor Briggs, Amanda Brown, Cory Marchi, Maddy Pontius, Jennifer Gallagher, Claire Kwok, Channing Bullock, Alex Mccollister, Kim Gorgens, Daniela Chavez, Yamilet Espinoza Nuñez, Giovanni Valladares Giron, William Christensen, Olivia Kachulis, Daniel Cierasynski, Brandon Cohen, Spenser Dobbs, Lindsay Goolsby, Noah Craver, Nyah Cubbison, Liam Doherty, Nicole Doris, Yan Qin, Alexander Nguyen, Lily Harmon, Shubh Todi, Naichen Zhao, Noah Fagello, Stacia Fritz, Paola Gascot-Chinea, Alex Volkova, Janelyn Geronimo, Elsie Harrington, Shane Simmons, Clarice Hise, Laura Moreno Palmer, Henry Xu, Yesu Leela Pasupula, Emily Fisher, Zachary Hogan, Colin Kleckner, Alyssa Knaus, Erin Kubat, Sam Werkema, Katie Lamberton, Lilliya Larson, Allie Leary, Vanessa Leon-Gamez, James H. Gallagher, E. Dale Broder, Robin M. Tinghitella, Emma Loeber, Alina Mali, Ixchel Marquez, Lauren Mcgrath, Ella Matthews, Grace Naegelen, Audrey Ng, Megan Lucyshyn, Rachel Brough, Alexandra Norman, Joe Ontiveros Rodriguez, Ben Dossett, Ori Miller, Janamejay Sharma, Christopher Reardon, Vincent Pandey, Regan Parish, Ren Pratt, Alisha Pravasi, Sanchari Das, Cari Reichel, Emma Robson, Victoria Rockwell, Jayce Rumsey, Steven Said, Norah Schroder, Alaina Smith, Shannon Murphy, Shujan A. Sharafeldeen, Stanley M. Kanai, James T. Nichols, David E. Clouthier, Macalia R. Augustus, Daniel Silva Rios, Scott Simpson, Anna Sparling, Chase Spurbeck, Kimberly Chiew, Christine Stadnik-Poteroba, Jacqueline Stephenson, Evelyn Stovin, Mia Supan, Lauren Tapper, Will Thrush, Anna Vogt, Michaela Walheim, Jon Weber, Hunter Whitehouse, Kansas Wood, Hayley Sayre, Lydia Mccann, Maread Mclaughlin, Kelly Krumrie, Olivia Wuttke
Du Undergraduate Showcase Abstracts: Research, Scholarship, And Creative Works, August Alexander, Kevin Summers, E. Paige Lloyd, Alyssa Aragon, Lauren Wols, Erica Larson, Colton Arciniaga, Lily Baeza, Ellie Barnett-Cashman, Sidney Barbier, Maverick Bartholomew, Ryan Bell, Trevor Briggs, Amanda Brown, Cory Marchi, Maddy Pontius, Jennifer Gallagher, Claire Kwok, Channing Bullock, Alex Mccollister, Kim Gorgens, Daniela Chavez, Yamilet Espinoza Nuñez, Giovanni Valladares Giron, William Christensen, Olivia Kachulis, Daniel Cierasynski, Brandon Cohen, Spenser Dobbs, Lindsay Goolsby, Noah Craver, Nyah Cubbison, Liam Doherty, Nicole Doris, Yan Qin, Alexander Nguyen, Lily Harmon, Shubh Todi, Naichen Zhao, Noah Fagello, Stacia Fritz, Paola Gascot-Chinea, Alex Volkova, Janelyn Geronimo, Elsie Harrington, Shane Simmons, Clarice Hise, Laura Moreno Palmer, Henry Xu, Yesu Leela Pasupula, Emily Fisher, Zachary Hogan, Colin Kleckner, Alyssa Knaus, Erin Kubat, Sam Werkema, Katie Lamberton, Lilliya Larson, Allie Leary, Vanessa Leon-Gamez, James H. Gallagher, E. Dale Broder, Robin M. Tinghitella, Emma Loeber, Alina Mali, Ixchel Marquez, Lauren Mcgrath, Ella Matthews, Grace Naegelen, Audrey Ng, Megan Lucyshyn, Rachel Brough, Alexandra Norman, Joe Ontiveros Rodriguez, Ben Dossett, Ori Miller, Janamejay Sharma, Christopher Reardon, Vincent Pandey, Regan Parish, Ren Pratt, Alisha Pravasi, Sanchari Das, Cari Reichel, Emma Robson, Victoria Rockwell, Jayce Rumsey, Steven Said, Norah Schroder, Alaina Smith, Shannon Murphy, Shujan A. Sharafeldeen, Stanley M. Kanai, James T. Nichols, David E. Clouthier, Macalia R. Augustus, Daniel Silva Rios, Scott Simpson, Anna Sparling, Chase Spurbeck, Kimberly Chiew, Christine Stadnik-Poteroba, Jacqueline Stephenson, Evelyn Stovin, Mia Supan, Lauren Tapper, Will Thrush, Anna Vogt, Michaela Walheim, Jon Weber, Hunter Whitehouse, Kansas Wood, Hayley Sayre, Lydia Mccann, Maread Mclaughlin, Kelly Krumrie, Olivia Wuttke
DU Undergraduate Research Journal Archive
Abstracts from the DU Undergraduate Research Showcase.
Estimating Increased Transient Water Storage With Increases In Beaver Dam Activity, Konrad Hafen, Joseph M. Wheaton, Brett B. Roper, Philip Bailey, William W. Macfarlane, Bethany T. Neilson, Christopher J. Tennant
Estimating Increased Transient Water Storage With Increases In Beaver Dam Activity, Konrad Hafen, Joseph M. Wheaton, Brett B. Roper, Philip Bailey, William W. Macfarlane, Bethany T. Neilson, Christopher J. Tennant
Watershed Sciences Faculty Publications
Dam building by beaver (Castor spp.) slows water movement through montane valleys, increasing transient water storage and the diversity of residence times. In some cases, water storage created by beaver dam construction is correlated to changes in streamflow magnitude and timing. However, the total amount of additional surface and groundwater storage that beaver dams may create (and, thus, their maximum potential impact on streamflow) has not been contextualized in the water balance of larger river basins. We estimate the potential transient water storage increases that could be created at 5, 25, 50, and 100% of maximum modeled beaver dam capacity …
Reports Of Autosomal Recessive Disease And Consanguineous Mating Within The Human Population, Johnathon L. Schluter
Reports Of Autosomal Recessive Disease And Consanguineous Mating Within The Human Population, Johnathon L. Schluter
Master's Theses
It is anecdotally evident when investigating published reports of autosomal recessive disease that a substantial number of cases are the result of related (consanguineous) mating. This research seeks to quantify the percent of manuscripts describing autosomal recessive diseases published between 2000 and 2020 in which consanguineous mating is indicated. We analyzed 602 peer-reviewed manuscripts to identify the percentage of cases presented in which consanguineous mating was indicated, the underlying genes (novel gene or new mutation) and geographical region. These papers were accessed through a specific set of parameters on the free access PubMed Central (PMC) database. A total of 552 …
Extreme Climate Events And Agricultural Commodity Markets, Mohammad Abir Chowdhury Shovon
Extreme Climate Events And Agricultural Commodity Markets, Mohammad Abir Chowdhury Shovon
LSU Master's Theses
This article investigates the impact of extreme climate events on U.S. agricultural commodity markets, specifically focusing on corn and soybeans. Using event study methods and a comprehensive dataset of 254 extreme climate events for corn as well as 250 extreme climate events for soybeans in top ten corn & soybeans producing states of the USA between 1995 and 2023, we examine how storms, floods, extreme temperatures, and droughts affect the abnormal returns of these commodities. Our findings indicate that 22.04% of climate events significantly impact corn returns and 21.20% of climate events have significant impact on soybeans returns. Notably, extreme …
Lyme Disease In The Northeast: The Unintended Consequence Of Suburban Development, Hayden Neubert
Lyme Disease In The Northeast: The Unintended Consequence Of Suburban Development, Hayden Neubert
Student Theses 2015-Present
This paper addresses the role of suburban development in the suburbs of the Northeastern United States in increasing human Lyme disease infection. Over the past 50 years, Lyme disease has become the most common vector-borne disease in the United States. In 2021, the two states with the most Lyme disease cases were New York and New Jersey, with a collective 6,524 cases, with Connecticut still representing 541 total cases. It is not a coincidence that case numbers are concentrated in suburban areas with high forest fragmentation. Chapter 1 of this essay analyzes how human land development disrupts bioregulatory ecosystem actors …
From Pixels To Plants: Remote Sensing Of California Invasive Plants, Kenneth Rangel
From Pixels To Plants: Remote Sensing Of California Invasive Plants, Kenneth Rangel
Master's Projects and Capstones
Invasive plants cause significant impacts to ecosystems, the economy, and human health. California has experienced significant plant invasions and is well suited to future invasion because of its Mediterranean climate and human disturbance. Eradication or control of invasive plant species requires a detailed understanding of their spatial distribution, which typically involves on the ground surveys that can be expensive or inconsistent. Remote sensing offers a potential alternative or supplement to in-person invasive plant mapping. This study performed a comparative analysis of 41 remote sensing studies that mapped the distribution of California invasive plants. I found that while high spectral resolution …
Managing The Environmental And Socio-Economic Impacts Of Rohingya Refugees In Bangladesh, Mousume Azad
Managing The Environmental And Socio-Economic Impacts Of Rohingya Refugees In Bangladesh, Mousume Azad
Master's Projects and Capstones
In August 2017, nearly 1 million Rohingya people fled to Bangladesh to save their lives from the genocide inflicted by the military of Myanmar. At present, over 1.3 million Rohingyas are staying at Cox’s Bazar, Bangladesh, in 34 overcrowded refugee camps. This research examined the environmental impacts especially the change in vegetation cover and land surface temperature as well as the socioeconomic alteration of the host country after the refugee influx. The research found a 5488 ha or 9.58% decrease in forest area, accompanied by an 8.25% increase in refugee settlement areas, an increase in average land surface temperature within …
Impact Of Temperature On Children’S Nutrition: A Comparative Study Of Three Ecological Regions Of Nepal, Prakriti Shakya
Impact Of Temperature On Children’S Nutrition: A Comparative Study Of Three Ecological Regions Of Nepal, Prakriti Shakya
Master's Theses
Nutrition obtained during the growth period of childhood significantly influences long-term well-being and overall productivity, ultimately contributing to the economy of a society. However, weather shocks can wreak havoc by damaging crops, changing yields of important crops and disrupting market access, which directly impacts the food intake of both adults and children. When these adverse events occur during childhood, short term and long term inadequacy in nutrition as well as disease incidence can cause malnutrition leading to stunted growth and cognitive impairment that may persist into adulthood, affecting the labor market and increasing health expenditure. To address this issue, we …
Land Use Intensification And Bio-Resource Utilisation In The South Pacific Islands, David Lopez Cornelio
Land Use Intensification And Bio-Resource Utilisation In The South Pacific Islands, David Lopez Cornelio
International Journal of Islands Research
The long and gradual colonisation of the Pacific islands created settlements of cohesive social networks that fused or were displaced by western ways of life, trade and governance through the centuries. In this paper, a historical review of the processes of island discovery, plants domestication, and of land use practices are discussed alongside the main socioeconomic drivers of land cover change. The native trees of the South Pacific constitute an invaluable resource for sustainable development; they were used and domesticated for thousands of years but logging, commercial agriculture, mining, the introduction of exotic species and urban expansion are threatening them …
Plenary: Mathematics Of Malaria Transmission Dynamics: The Renewed Quest For Eradication, Abba Gumel
Plenary: Mathematics Of Malaria Transmission Dynamics: The Renewed Quest For Eradication, Abba Gumel
Biology and Medicine Through Mathematics Conference
No abstract provided.
Adopting Yield-Improving Practices To Meet Maize Demand In Sub-Saharan Africa Without Cropland Expansion, Fernando Aramburu-Merlos, Fatima A. M. Tenorio, Nester Mashingaidze, Alex Sananka, Stephen Aston, Jonathan J. Ojeda, Patricio Grassini
Adopting Yield-Improving Practices To Meet Maize Demand In Sub-Saharan Africa Without Cropland Expansion, Fernando Aramburu-Merlos, Fatima A. M. Tenorio, Nester Mashingaidze, Alex Sananka, Stephen Aston, Jonathan J. Ojeda, Patricio Grassini
Department of Agronomy and Horticulture: Faculty Publications
Maize demand in Sub-Saharan Africa is expected to increase 2.3 times during the next 30 years driven by demographic and dietary changes. Over the past two decades, the area croppedwithmaize has expanded by 17million hectares in the region, with limited yield increase. Following this trend could potentially result in further maize cropland expansion and the need for imports to satisfy domestic demand. Here, we use data collected from 14,773 smallholder fields in the region to identify agronomic practices that can improve farm yield gains. We find that agronomic practices related to cultivar selection, and nutrient, pest, and crop management can …
The Sect. Tricheroides In The Genus Knautia (Caprifoliaceae) Is More Complex Then Known: An Unusual New Species From Türkiye, Candan Aykurt, Mertcan Gülben, Sinem Günaydin, Duygu Sari, Ramazan Süleyman Göktürk, Emirhan Berberoğlu, Serkan Gülsoy
The Sect. Tricheroides In The Genus Knautia (Caprifoliaceae) Is More Complex Then Known: An Unusual New Species From Türkiye, Candan Aykurt, Mertcan Gülben, Sinem Günaydin, Duygu Sari, Ramazan Süleyman Göktürk, Emirhan Berberoğlu, Serkan Gülsoy
Turkish Journal of Botany
During a biodiversity survey in the Western Taurus Mountains (Antalya, Türkiye), a new species of the genus Knautia (Dipsacoideae, Caprifoliaceae), K. sivridaghense, was discovered. The new species, which is characterized by its dwarf caespitose perennial habit, is found in rocky places under mixed forests at elevations of 1400–1450 m. Knautia sivridaghense is distinguished from its morphologically similar species, K. goecmenii, especially by its dwarf caespitose perennial habit, unbranched stems, length of involucral bracts, and other floral characteristics. Our phylogenetic analyses based on the nuclear ITS and chloroplast petN(ycf6)-psbM regions confirm its placement within Sect. Tricheroides, contributing to the understanding of …
Agroecology And Soil Stewardship: Values And Techniques Of Smallholder Farmers In Bernalillo County, Stephanie Olivas
Agroecology And Soil Stewardship: Values And Techniques Of Smallholder Farmers In Bernalillo County, Stephanie Olivas
Geography ETDs
Agrarian movements around the world use agroecology to build sovereignty and steward dynamic ecosystems. Research has shown that agroecological farmers steward more resilient crops, more resilient soil biomes, and greater biodiversity than conventional agriculture. GIS and remote sensing offer many tools to detect the impacts of these farmers on the environment, but it is less clear how such technologies fit into agroecological goals. This study asks: what values, experiences and knowledge do smallholder producers in Bernalillo County embody in their soil stewardship practices? Also, what experience or knowledge do smallholder producers in Bernalillo County have about remote sensing, and would …
Precipitation Seasonality Amplifies As Earth Warms, Xiaoyu Wang, Ming Luo, Fengfei Song, Sijia Wu, Yongqin David Chen, Wei Zhang
Precipitation Seasonality Amplifies As Earth Warms, Xiaoyu Wang, Ming Luo, Fengfei Song, Sijia Wu, Yongqin David Chen, Wei Zhang
Plants, Soils, and Climate Faculty Publications
Precipitation exhibits a pronounced seasonal cycle, of which the phase and amplitude are closely associated with water resource management. While previous studies suggested an emerged delaying phase in the past decades, whether the amplified amplitude has emerged is controversial. Using multiple observational data sets and climate simulations, here we show that the amplification of precipitation annual cycle has emerged in most global land areas since the 1980s, especially in the tropics. These amplifications are mainly driven by anthropogenic emissions, and will be further intensified by 17.6% in the future (2081–2100) under high emission scenario (Shared Socioeconomic Pathways, SSP585), and limited …
Variability In Large Mammal Activity Patterns When Visiting Water In New Mexico, Juan E. Camacho
Variability In Large Mammal Activity Patterns When Visiting Water In New Mexico, Juan E. Camacho
Biology ETDs
Studying activity patterns of animals can provide vital information about how different species react to environmental changes, yet camera trap studies typically neglect the temporal aspect of the data. Using a 10-year camera trap dataset on Sevilleta National Wildlife Refuge, NM, we explored daily activity patterns when visiting water of five large mammal species. The species of study were mule deer, pronghorn, elk, oryx, and coyote. All species showed significant variability in activity patterns from site to site across the refuge. Within a site, differences in activity across years and seasons were less pronounced. Mule deer and coyote showed very …
Assessing Structural Variation In And Out Of The Classroom: Characterizing Structural Variation Within Campanula Americana And Effects Of Long Read Sequencing On Students Learning, Tyler Gandee
Masters Theses, 2020-current
Cytonuclear incompatibilities are proposed to be one of the first genetic barriers to arise during speciation, so understanding the underlying evolutionary forces that contribute to cytonuclear incompatibilities is important. Many studies have looked at SNP level variation in the plastid genome and its relationship with cytonuclear incompatibility, but no studies have examined structural variation and its relationship to cytonuclear incompatibility, particularly at the early stages of speciation, i.e. within species. Campanula americana is a great system for this because it exhibits cytonuclear incompatibility and the family in which it is found, the Campanulaceae, exhibits rapidly evolving plastid genomes, including …
Dragon Pseudoscorpions Shed Light On Ancient Climate History In The Pacific Northwest, Joshua W. Hootman
Dragon Pseudoscorpions Shed Light On Ancient Climate History In The Pacific Northwest, Joshua W. Hootman
Student Research Symposium
Pseudoscorpions are an ancient and diverse group of understudied arachnids, and there is much to be learned about their relationships to each other. Pseudoscorpions are one of many leaf-litter dwelling and low dispersing invertebrates that inhabit the forests of the Pacific Northwest. Previous phylogeographic studies of Pacific Northwest taxa have shed light on some of the climatic and geologic events that have shaped the area's flora and fauna. One purpose of this study is to determine if there is similar genetic structuring within the pseudoscorpion populations present in the study area, or if there is even more structure likely influenced …
Fireflies At Rpa Natural Area Final Report, Olivia H. Bush, Sydney M. Shea, Sofia J. Gordon, Nick S. Wiebke
Fireflies At Rpa Natural Area Final Report, Olivia H. Bush, Sydney M. Shea, Sofia J. Gordon, Nick S. Wiebke
Final Reports in ENST 411: Environmental Community Projects
Our group worked alongside community partners Shaunna Barnhart and Jim Dunn during the Spring 2024 semester to assist with their annual event Fireflies at RPA Natural Area. RPA Natural Area is a local park in South Williamsport, Pennsylvania that was recently acquired by Southside Recreational Authority. Since taking over the park, the organization has begun hosting an event each July to educate the general public about firefly biology and conservation by showing a film and guiding attendees through a firefly tour through the park. Our goals for this project included creating physical educational materials to be used at the park …
Crossing The Ocean: The Importance Of Gene Flow In Island Evolution, Ethan F. Gyllenhaal
Crossing The Ocean: The Importance Of Gene Flow In Island Evolution, Ethan F. Gyllenhaal
Biology ETDs
Islands have long been a critical arena for the development of ecological and evolutionary theory, particular due to persistent open-water gaps between them. In this dissertation I demonstrates how these caps are permeable, which can be leveraged to understand evolution on islands and more broadly. The first chapter develops this connection between ongoing, overwater gene flow and island biogeographic theory, and tests it on an archipelago species. The second take a three-pronged approach in demonstrating how over-water gene flow can bias phylogenetic inference, and how many phylogeographic metrics in islands are likely shaped by long-term gene flow. The final two …
The North Central Extension Risk Management Education Center, Part I: Helps Producers Manage Risks, Christine Lockert, Sheila Aikanathan Johnson, Bradley D. Lubben
The North Central Extension Risk Management Education Center, Part I: Helps Producers Manage Risks, Christine Lockert, Sheila Aikanathan Johnson, Bradley D. Lubben
Cornhusker Economics
Established in 2001, the North Central Extension Risk Management Education Center (NCERMEC) has a long history of supporting risk management education programs serving producers in the region. Located at the University of Nebraska-Lincoln Agricultural Economics Department, the Center is one of four regional Extension Risk Management Education (ERME) Centers located throughout the country. ERME is funded through USDA’s National Institute of Food and Agriculture (NIFA) and was authorized by the Agricultural Risk Protection Act of 2000. The fundamental purpose of the ERME program is to educate producers to manage risk and position their farm or ranch for future growth and …
Microbial Community Composition And Assembly In Diverse Environmental Systems, Rhiannon Celeste Vargas
Microbial Community Composition And Assembly In Diverse Environmental Systems, Rhiannon Celeste Vargas
Arts & Sciences Graduate Student Theses and Dissertations
Analyzing microbial community responses across systems, particularly in coordinated ways, is critical to informing meaningful community ecology patterns. In Chapter 1, I provide historical contexts to the field of microbial community ecology. In Chapter 2 I have investigated a specific opportunistic pathogen, Staphyloccocus pseudintermedius, by utilizing whole genome sequencing to understand the genomic architecture that contributes to the community structures of S. pseudintermedius found in different environmental niches. We found that unlike other Staphylococcal pathogens, S. pseudintermedius niches are indistinguishable by core and accessory gene architecture. Rather, niches are resolved through the encoding of antimicrobial resistances such as those isolates …
Major Axes Of Variation In Tree Demography Across Global Forests, Melina De Souza Leite, Sean M. Mcmahon, Paulo Inácio Prado, Stuart J. Davies, Alexandre Adalardo De Oliveira, Hannes P. De Deurwaerder, Salomón Aguilar, Kristina J. Anderson-Teixeira, Nurfarah Aqilah, Norman A. Bourg, Warren Y. Brockelman, Nicolas Castaño, Chia-Hao Chang-Yang, Yu-Yun Chen, George Chuyong, Keith Clay, Álvaro Duque, Sisira Ediriweera, Corneille E. N. Ewango, Gregory Gilbert, I. A. U. N. Gunatilleke, C. V. S. Gunatilleke, Robert Howe, Walter Huaraca Huasco, Akira Itoh, Daniel J. Johnson, David Kenfack, Kamil Král, Yao Tze Leong, James A. Lutz, Jean-Remy Makana, Yadvinder Malhi, William J. Mcshea, Mohizah Mohamad, Musalmah Nasardin, Anuttara Nathalang, Geoffrey Parker, Renan Parmigiani, Rolando Pérez, Richard P. Phillips, Pavel Šamonil, I-Fang Sun, Sylvester Tan, Duncan Thomas, Jill Thompson, María Uriarte, Amy Wolf, Jess Zimmerman, Daniel Zuleta, Marco D. Visser, Lisa Hülsmann
Major Axes Of Variation In Tree Demography Across Global Forests, Melina De Souza Leite, Sean M. Mcmahon, Paulo Inácio Prado, Stuart J. Davies, Alexandre Adalardo De Oliveira, Hannes P. De Deurwaerder, Salomón Aguilar, Kristina J. Anderson-Teixeira, Nurfarah Aqilah, Norman A. Bourg, Warren Y. Brockelman, Nicolas Castaño, Chia-Hao Chang-Yang, Yu-Yun Chen, George Chuyong, Keith Clay, Álvaro Duque, Sisira Ediriweera, Corneille E. N. Ewango, Gregory Gilbert, I. A. U. N. Gunatilleke, C. V. S. Gunatilleke, Robert Howe, Walter Huaraca Huasco, Akira Itoh, Daniel J. Johnson, David Kenfack, Kamil Král, Yao Tze Leong, James A. Lutz, Jean-Remy Makana, Yadvinder Malhi, William J. Mcshea, Mohizah Mohamad, Musalmah Nasardin, Anuttara Nathalang, Geoffrey Parker, Renan Parmigiani, Rolando Pérez, Richard P. Phillips, Pavel Šamonil, I-Fang Sun, Sylvester Tan, Duncan Thomas, Jill Thompson, María Uriarte, Amy Wolf, Jess Zimmerman, Daniel Zuleta, Marco D. Visser, Lisa Hülsmann
Wildland Resources Faculty Publications
The future trajectory of global forests is closely intertwined with tree demography, and a major fundamental goal in ecology is to understand the key mechanisms governing spatio-temporal patterns in tree population dynamics. While previous research has made substantial progress in identifying the mechanisms individually, their relative importance among forests remains unclear mainly due to practical limitations. One approach to overcome these limitations is to group mechanisms according to their shared effects on the variability of tree vital rates and quantify patterns therein. We developed a conceptual and statistical framework (variance partitioning of Bayesian multilevel models) that attributes the variability in …
The Biltmore Forest School And The Establishment Of Forestry Education In America, Dan Barry Croom
The Biltmore Forest School And The Establishment Of Forestry Education In America, Dan Barry Croom
Journal of Research in Technical Careers
The Biltmore Forest School, despite its unusual existence within the affluent Biltmore Estate, played a crucial role in the early 20th-century American forestry movement. Founded by Carl A. Schenck and supported by George Vanderbilt II, the school aimed to educate foresters and promote sustainable forest management. However, many aspects of the Biltmore experiment failed due to the new and untested nature of forestry science in America. This experiment exposed a fundamental divide in forestry education, with Gifford Pinchot advocating for conservation-centered teaching while Schenck believed in the economic viability of lumber production. Ultimately, the Biltmore Forest School offered valuable vocational …
Mammalian Roadkill Trends In Central Georgia, Lucy Beck
Mammalian Roadkill Trends In Central Georgia, Lucy Beck
Biology Theses
Wildlife-vehicle collisions are a global concern for both wildlife conservation and driver safety, and knowledge of spatiotemporal trends are required in order to effectively mitigate these consequences. This study documents species composition and spatiotemporal trends in terrestrial mammalian roadkill using ten-years of data recorded along a 12.8 mile stretch of State Route 212 in Baldwin and Putnam Counties, Georgia. From January 1 2012 to December 31 2021, 2,263 roadkilled vertebrates were observed on the survey route, and terrestrial mammals accounted for 84% of the observations. Two methods of hotspot identification indicated a non-random spatial distribution of roadkill associated with physical …
Riparian Expansion Post-Restoration Efforts Along The Upper Clark Fork River, Makena Tanko
Riparian Expansion Post-Restoration Efforts Along The Upper Clark Fork River, Makena Tanko
Graduate Theses & Non-Theses
Floodplain restoration is an intricate process aimed at promoting water quality, biodiversity, and maintaining ecological balance. However, mapping vegetation patterns on a restored floodplain can be challenging due to different geomorphic locations across a river sections, including flooding regimes, sediment characteristics, elevation, and ground water availability. This study investigates the drivers of vegetation succession in floodplains post-restoration along the Upper Clark Fork River, encompassing Phases 1, 2, 3, and 5. We analyzed key factors influencing vegetation response, including total canopy cover and woody vegetation health, in comparison to soil compaction, geomorphic location, distance from streambank, time post-restoration, and metal levels …
Sea Surface Temperature Influence On Tropical Storms And Hurricanes, Elise Leroux '26
Sea Surface Temperature Influence On Tropical Storms And Hurricanes, Elise Leroux '26
Biology Student Scholarship
Hurricanes are both dangerous and difficult to predict because of the various factors that influence the size and intensity of storms, where sea surface temperature (SST) is one of the most relevant variables. As temperatures are increasingly rising due to climate change, the effect on storm size, intensity, and frequency is going to be greater. There have been many studies how individual storms are affected, but less so on the overall frequency of hurricanes. This study assesses the number of hurricanes each year in comparison to the SST and the average wind speed of each hurricane. I predict that years …