Digital Commons Network^™

A Test Of The Abundant-Center Hypothesis For Stream Fishes, Matthew L.W. Zink, Brandon K. Peoples, Julian D. Olden, Lily M. Thompson, William K. Annis, Stephen R. Midway

Faculty Publications

The abundant-center hypothesis (ACH) provides a conceptual model for predicting range-wide distributions of species abundance, suggesting that abundance peaks in the center of the geographic range and declines towards range edges. Empirical studies testing the ACH and its subsequent derivations predominantly occurred in terrestrial systems and reported mixed support. Moreover, none of these models consider the possibility of multiple geographic areas of elevated abundance (which we refer to as ‘abundant cores'). Naturally dispersal limited species may exhibit multiple abundant cores, requiring refinement of the ACH. We used fish species abundances from 29 206 community monitoring surveys and weighted geospatial kernel …

Broken Rituals: Contending Gods And Sacred Cows In Religious Racial Reconciliation And Race Relations, Ewart E. Forde

LSU Doctoral Dissertations

Race remains one of the most important determinants of a host of sociological outcomes despite claims that social characteristics such as class matter more. For example, racial inequalities are apparent in educational outcomes and regarding to asset-ownership. Perhaps the most troubling evidence of persistent racial inequities is the killing of Black people by law enforcement officials or civilians while they are engaged in such mundane activities, such as jogging in a neighborhood or selling compact discs (CDs). In the aftermath of these unnatural killings, there are often calls for racial reconciliation, faith based racial reconciliation. In times where it appears …

Protecting Cultural Heritage In A Changing Climate: A Risk Assessment Model For Galleries, Libraries, Archives, And Museums In Florida, United States, Emily E. Fisher

LSU Master's Theses

The aim of this research is to develop a climate threat risk assessment scale for galleries, libraries, archives, and museums within the State of Florida. Current research neglects the localized impact of tropical cyclones, inland flash flooding, and exposure to SLR on cultural institutions. Tropical cyclone events bring in flooding, intense wind speeds, and power outages which affect these institutions. Tropical cyclone data from the National Hurricane Center are used to represent historical wind occurrence. Finally, flash flood warning data are used to represent the flooding likelihood in each county. Each threat is assessed individually across Florida counties. The range …

Source Origins Of Hunter-Harvested Waterfowl In Arkansas And Louisiana, Shannon C. Stemaly

LSU Master's Theses

Understanding variability in breeding origins of harvested waterfowl is important for effective population management and regional conservation. Band-recovery data are often used to estimate harvest derivation and inform resource allocation for cross-seasonal conservation. However, uneven spatial and temporal banding effort across species' breeding ranges may result in an incomplete understanding of summer origins and recruitment, particularly if portions of the breeding range are inaccessible. Analysis of stable-hydrogen isotope ratios in duck feathers (δ²H_f) provides an alternative method for identifying source origins of unmarked populations since environmental deuterium values follow a predictable latitudinal gradient across North …

Enduring Words: Resistance Through Sculptural Libraries, Alex C. Jacobs

LSU Master's Theses

Enduring Words: Resistance Through Sculptural Libraries is a thesis exhibition that challenges book censorship by transforming reading into a public and defiant act. Through direct sculptural interventions, the exhibition confronts cultural erasure, questions who controls the literature we consume, and highlights the role of art in safeguarding contested knowledge. This thesis focuses on a current body of exhibited sculptural works that embody the tension between access and erasure. These installations engage with the viewer by using a lighthouse built of books and a speech-bubble-shaped library embedded with censored texts. They do not quietly mourn the suppression of knowledge; they confront …

Atrapado En Limbo: Fronteras, Anthropologists, And Translation In Contexts Of The Missing And Unidentified At The México-Us Border, Aliya M. Godoy

LSU Master's Theses

The Missing Migrants Project reports that in the past 11 years, 11,138 missing migrants have been recorded in the Americas, with 6,512 of those migrants situated at the México-United States (US) border (Migration Within the Americas, n.d.). The crisis of missing and unidentified migrants at the México-US border is a topic of great discussion in the field of anthropology, and specifically in discourses of humanitarian forensic anthropological work. This research addresses the crisis at the border, expanding on the scholarship of family agency and language barriers between Spanish-speaking communities and medicolegal actors by investigating the role of anthropologists …

All But Mud & Memories, Chase Lt Romero

LSU Master's Theses

All But Mud & Memories addresses the inevitability of erosion and land loss near my homeland of Algiers Point— locally known as The Point— through the perspective of locals and visitors, in addition to my own experience. Located near New Orleans across the Mississippi River, Algiers Point holds a community that shares a tender bond with the levee that protects their home and day-to-day interactions. Often in discussions of wetland events in Louisiana, the focus is on land and environmental losses rather than the surrounding culture. I provide a more community-centered narrative by expressing what’s to be lost if the …

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 …

Connections, Peter Froehlich

LSU Master's Theses

A definitive shift in American social interaction has been taking place far longer than most realize. It is easy to point the finger at the prevalence of technology and social media, this has been a trend that has been going on since the mid to late twentieth century. Stemming from changes in design, the breakdown of scheduled social outlets, and shifts in technology have led to what some writers and sociologists are calling “The Anti-Social Century.”

Working through a making practice to promote the building of connections through social interaction, three different types of spaces were targeted for the exploration …

Red Cows, Yellow Dogs: Political Identity, Political Polarization, And Media Skepticism In A Single-Party Socialist Republic, Huu Dat Tran

LSU Doctoral Dissertations

This dissertation examines the interplay among political identity, trust in government and media, and patterns of media consumption in Vietnam, a single‐party socialist republic in Southeast Asia. Moving beyond the liberal democratic focus of existing scholarship, the dissertation challenges the assumption of political homogeneity in authoritarian settings and empirically explores the extent and character of polarization.

The dissertation takes a quantitative approach and employs multiple statistical techniques, including latent profile analysis (LPA) and structural equation modeling (SEM). It uncovers multiple latent political profiles within Vietnamese society, defined by varying degrees of trust in the government and ideological orientation. Further analysis …

The Legacy Of Auguste Franchomme: Pedagogical Analysis And Performance Practice For The “Twelve Caprices Opus 7 For Cello Solo”, Zi-Yun Luo

LSU Doctoral Dissertations

This written document focuses on a personal pedagogical analysis of the Twelve Caprices composed by the French cellist and pedagogue, Auguste Franchomme. His works have served as significant cello studies for young cellists, comparable in importance to the Twelve Caprices by Carlo Alfredo Piatti and the High School of Cello Playing by David Popper. Each of these caprices is written in different key signatures, tempi, include a variety of bowing styles and techniques, express melodies over a wide range of the cello register, and present unique and ubiquitous issues that cellists may encounter in the canon of cello literature.

In …

Nonnative Species Richness And Dominance Reveal Differing Support For Invasion Theory At A Continental Extent, Lily M. Thompson, William K. Annis, Stephen R. Midway, Julian D. Olden, Brandon K. Peoples

Faculty Publications

Aim: Empirical tests of conceptual hypotheses describing species invasions often differ depending on the spatial scale (spatial resolution and extent of study area) at which they were conducted. Some of this disparity may arise from tradeoffs in data quality necessitating the use of different indices of community invadedness among scales. Local-scale studies typically use fine-resolution, descriptive measures of community invadedness (‘dominance’, the proportion nonnative individuals) at limited spatial extents, while macroscale studies often aggregate datasets to cover large spatial extents but use coarser spatial resolution and less descriptive indices (nonnative species richness). We investigated the consequences of using different indices …

Advancing Aerial Survey Techniques For Non-Breeding Waterfowl Populations: A Comprehensive Review And Application In Northeastern Louisiana, Victoria L. Drake

LSU Master's Theses

Aerial surveys play a crucial role in monitoring North America's waterfowl populations and habitat conditions, and consistency across geographies and years allows biologists to track trends through time. The goal of this project was to redesign the northeastern portion of the Louisiana wintering waterfowl survey to align with statistically robust transect surveys conducted in neighboring states within the Mississippi Alluvial Valley. To identify the optimal sampling method, we evaluated three transect weighting schemes: stratified random (unweighted), stratified by watershed, and stratified by expert opinion. Approximately 10% of the total sampling area was randomly selected for each survey period, adhering to …

Impacts Of Extreme Weather Conditions On Coastal Fisheries Near Bayou Teche, Louisiana From 2019–2023, Georgia C. Davis

LSU Master's Theses

The region of Southcentral Louisiana, particularly around Bayou Teche, thrives on its commercial and recreational fisheries. These fisheries are occasionally subject to events like extreme weather that cause sudden and unexpected losses (NOAA Fisheries, 2024a). Between 2019 and 2023, a series of extreme weather events impacted southcentral Louisiana near Bayou Teche. This series of extreme events includes Hurricane Barry (2019), Hurricane Laura (2020), Hurricane Delta (2020), Hurricane Zeta (2020), Hurricane Ida (2021), and a United States Drought Monitor (USDM) D4 drought (2023). This study analyzes the impacts of the extreme weather series on coastal fish observed species richness (SR) in …

“En Clave” Tania León And Roberto Sierra: Autochthonous Music Of Cuba And Puerto Rico, Contemporary Music Composition And The ‘Puente’ In Between, Omar A. Ramirez

LSU Doctoral Dissertations

This document is in two parts. The first examines selected works of Latin-American composers Tania León and Roberto Sierra. Both composers cite their cultural background as a force that shapes their artistic expression. Many of their works are titled in Spanish, with compositions referencing their homelands in subject and narrative, and incorporate the autochthonous music(s) of Cuba and Puerto Rico. Elements of these afrodiasporic musical traditions can be found in their works: Alegre, Batá, Stride, (León), Loiza, and Concerto for Viola (Sierra), each examined here.

Autochthonous musical elements are highlighted in score excerpts and described using …

Introduction: The Future Of Global Journalism—Relationships, Tools, And Power, Ruth Moon, Lea Hellmueller, Herman Wasserman

Faculty Publications

No abstract provided.

Geo-Ai For Wetland Classification And Evolutionary Analysis, Lirong Yin

LSU Doctoral Dissertations

Wetlands, as a crucial component of the Earth's ecosystem, play a vital role in maintaining ecological balance and preserving biodiversity. However, wetlands are currently facing severe challenges, as both natural and human-induced factors are contributing to their global degradation. Gaining a deep understanding of the species composition and biodiversity within wetland-covered areas and accurately analyzing their changing trends not only helps assess the current and future state of wetlands but also provides strong support for the formulation of scientifically sound wetland conservation strategies. In recent years, the rapid development of geospatial intelligence and remote sensing technologies has brought new opportunities …

"En Clave" Tania León And Roberto Sierra: Autochthonous Music Of Cuba And Puerto Rico, Contemporary Music Composition And The 'Puente' In Between, Omar A. Ramirez

LSU Doctoral Dissertations

This document is in two parts. The first examines selected works of Latin-American composers Tania León and Roberto Sierra. Both composers cite their cultural background as a force that shapes their artistic expression. Many of their works are titled in Spanish, with compositions referencing their homelands in subject and narrative, and incorporate the autochthonous music(s) of Cuba and Puerto Rico. Elements of these afrodiasporic musical traditions can be found in their works: Alegre, Batá, Stride, (Leon), Loiza, and Concerto for Viola (Sierra), each examined here.

Autochthonous musical elements are highlighted in score excerpts and described using …

Negotiating Home In The Long Poem: Amatoritsero Ede’S Transpatiality, Mathias Iroro Orhero

Faculty Publications

In this paper, I argue that Amatoritsero Ede uses the long poem to negotiate the idea of home in an African diasporic context. As a form that carries the implications of length, time, and space, the long poem has been used by poets to interrogate the way we structure the world and to deconstruct grand narratives. The figure of the Black immigrant is one that destabilizes grand narratives of nationalism. This makes the form important in its capacity to ask important questions about nation and tradition even as it transgresses them. As a writer from the Niger Delta, a marginal …

High-Resolution Model Intercomparison Project Phase 2 (Highresmip2) Towards Cmip7, Malcolm J. Roberts, Kevin A. Reed, Qing Bao, Joseph J. Barsugli, Suzana J. Camargo, Louis Philippe Caron, Ping Chang, Cheng Ta Chen, Hannah M. Christensen, Gokhan Danabasoglu, Ivy Frenger, Neven S. Fučkar, Shabeh Ul Hasson, Helene T. Hewitt, Huanping Huang, Daehyun Kim, Chihiro Kodama, Michael Lai, Lai Yung Ruby Leung, Ryo Mizuta, Paulo Nobre, Pablo Ortega, Dominique Paquin, Christopher D. Roberts, Enrico Scoccimarro, Jon Seddon, Anne Marie Treguier, Chia Ying Tu, Paul A. Ullrich, Pier Luigi Vidale, Michael F. Wehner, Colin M. Zarzycki

Faculty Publications

Robust projections and predictions of climate variability and change, particularly at regional scales, rely on the driving processes being represented with fidelity in model simulations. Consequently, the role of enhanced horizontal resolution in improved process representation in all components of the climate system continues to be of great interest. Recent simulations suggest the possibility of significant changes in both large-scale aspects of the ocean and atmospheric circulations and in the regional responses to climate change, as well as improvements in representations of small-scale processes and extremes, when resolution is enhanced. The first phase of the High-Resolution Model Intercomparison Project (HighResMIP1) …

From The Mountains To The Beach: Water Purification Ecosystem Services And Recreational Beach Use In Puerto Rico, Maya Corridore, Rebeca De Jesús Crespo, Mariam Valladares-Castellanos, Thomas Douthat

Faculty Publications

Recreational beach use is important for coastal economies and is influenced by water clarity, a trait that may be maintained by water purification ecosystem services (ESs). However, few studies have addressed these linkages. In this study, we ask the following questions: (1) Do watershed-scale water purification ecosystem services influence coastal water quality? (2) Does coastal water quality help explain beach visitation rates? To address these questions, we focused on Puerto Rico (PR), where coastal tourism has economic and cultural importance. We estimated water purification ESs using the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST), coastal water quality using long-term …

Time-Series Data-Driven Pm2.5 Forecasting: From Theoretical Framework To Empirical Analysis, Chunlai Wu, Ruiyang Wang, Siyu Lu, Jiawei Tian, Lirong Yin, Lei Wang, Wenfeng Zheng

Faculty Publications

PM2.5 in air pollution poses a significant threat to public health and the ecological environment. There is an urgent need to develop accurate PM2.5 prediction models to support decision-making and reduce risks. This review comprehensively explores the progress of PM2.5 concentration prediction, covering bibliometric trends, time series data characteristics, deep learning applications, and future development directions. This article obtained data on 2327 journal articles published from 2014 to 2024 from the WOS database. Bibliometric analysis shows that research output is growing rapidly, with China and the United States playing a leading role, and recent research is increasingly focusing on data-driven …

“Where War Is God And God Is War:” Women’S Religious Great War Poetry And Homefront Lines, Faith Ellington

LSU Doctoral Dissertations

This project seeks to redefine war’s poetic landscape. Through a focus on women’s Great War poetry, I argue against a dichotomous home front | front line poetic barrier and instead explore the intermingling of wartime spaces. Women’s WWI poetry, I argue, exists within a space I call the homefront lines, a space in which women produce writing from their full experiences of war regardless of combatant status. The homefront lines must be included in World War I literary canons in order to fully recognize the humanity of women during wartime and to fully grasp the war’s impact on poetry …

Non-Orientable Surfaces Bounded By Knots, Megan K. Fairchild

LSU Doctoral Dissertations

The non-orientable 4-genus of a knot $K$ in $S^{3}$ is defined to be the minimum first Betti number of a non-orientable surface $F$ in $B^{4}$ so that $K$ bounds $F$. We will survey the tools used to compute the non-orientable 4-genus, and use various techniques to calculate this invariant for non-alternating 11 crossing knots, torus knots, and Whitehead doubles. We also will view obstructions to a knot bounding a M\"{o}bius band given by the double branched cover of $S^{3}$ branched over $K$. Additionally, we discuss the problem of the Whitehead double of the Figure 8 knot and survey commonly used …

Cross-State Travel For Cancer Care And Implications For Telehealth Reciprocity, Erika L. Moen, Qianfei Wang, Lingbo Liu, Fahui Wang, Anna N.A. Tosteson, Rebecca E. Smith, Lauren Cowan, Tracy Onega

Faculty Publications

Importance: Patients often travel for cancer care, yet the extent to which patients cross state lines for cancer care is not well understood. This knowledge can have implications for policies that regulate telehealth access to out-of-state clinicians. Objective: To quantify the extent of cross-state delivery of cancer services to patients with cancer. Design, Setting, and Participants: This cross-sectional study analyzed fee-for-service Medicare claims data for beneficiaries (aged ≥66 years) with a diagnosis of breast, colon, lung, or pancreatic cancer between January 1, 2017, and December 31, 2020. Analyses were performed between January 1 and July 30, 2024. Exposure: Patient rurality. …

Empowering Citizens Through The Development And Deployment Of A Community-Based Environmental Health Reporting Tool, Willow Sauermilch, Jennifer Irving, Margaret Reams, Chuqi Guo, Stephania Cormier, Jennifer Richmond-Bryant

Division of Basic Science Faculty Publications

Community-based participatory research provides communities with an avenue to actively collaborate with environmental researchers. The research aims to gain insight into critical problems of concern to community members while maintaining community autonomy over the research and its outcomes. This article describes the development and implementation of an environmental health communication tool designed to meet the needs of residents of Colfax, Louisiana, a rural community with limited technological access, which is engaging in advocacy with federal and state regulatory agencies to prohibit open burning and open detonation of military and Superfund wastes at a nearby thermal treatment site. We discuss how …

Butterfly Species Vary In Sex-Specific Sodium Accumulation From Larval Diets, Luis Y. Santiago-Rosario, Alexander M. Shephard, Emilie Snell-Rood, Achim D. Herrmann, Kyle E. Harms

Faculty Publications

Sodium is essential for animals, and its heterogeneous distribution can cause a range of phenomena, from sodium-seeking behaviours to impacting their performance. Although sodium content in soils and plants is relatively well documented, data for higher trophic levels are limited. Knowledge of the variation in sodium in lower trophic levels could have implications for understanding the behaviour and physiology of species at higher levels. We investigated the variation in tissue sodium concentration between males and females of four butterfly species. Puddling behaviour of Lepidoptera suggests sodium needs of males are generally greater than females, thus, we predicted males would accumulate …

Beyond Water Surface Profiles: A New Iterative Methodology For 2d Model Calibration In Rivers Using Velocity Data From Multiple Cross-Sections, Fabian Rivera-Trejo, Gabriel Soto-Cortes, Kory M. Konsoer, Eddy J. Langendoen, Gaston Priego-Hernandez

Faculty Publications

Observed longitudinal water-surface profiles are commonly used to calibrate river hydrodynamic models, relying on assumptions of lateral uniformity in water surface elevation and velocity distribution. While suitable for 1D models, this approach has limitations in regard to 2D model calibration. When 2D flow measurements are available, a more robust quantitative evaluation is necessary to assess model accuracy. This study introduces a novel methodology to improve 2D model calibration and evaluate performance. High-resolution bathymetric and hydrodynamic data collected with a multibeam echosounder (MBES) and acoustic Doppler current profiler (ADCP) were aligned to compare observed and simulated flow velocities at matching spatial …

Earliest Ancient Maya Salt Production In Southern Belize: Excavations At Jay-Yi Nah, Heather Mckillop, E. Cory Sills

Faculty Publications

Salt works along the Yucatan coasts of Mexico and Belize provide a record of salt production for inland trade during the height of Late Classic Maya civilisation (AD 550-800). At the Paynes Creek Salt Works in Belize, production focused on the creation of salt cakes by boiling brine in pots supported over fires in dedicated salt kitchens. Underwater excavations at the Early Classic (AD 250-550) site of Jay-yi Nah now indicate there was a longer and evolving tradition of salt making in the area, one that initially employed large, incurved bowls to meet local or down-the-line trade needs before inland …

Ceres: Organic-Rich Sites Of Exogenic Origin?, R. Sarkar, A. Nathues, M. Hoffmann, E. Cloutis, K. Mengel, P. Singh, G. Thangjam, J. Hernandez, S. Karunatillake, M. Coutelier

Faculty Publications

Ceres, the largest object in the asteroid belt, is the only potential ocean world in the inner Solar System. Previous studies identified deposits of aliphatic organics in and around the Ernutet crater, and at small locations at Inamahari and Urvara craters. The origin of organics, either endogenic or exogenic, in these fresh exposures is still under debate. This study addresses the origin of the organics by analyzing their global distribution and geologic context. Our first step involved a global search for organic-rich sites that might have escaped previous detections. We achieved this by using a deep neural network, utilizing spectral …