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Workplace Bullying In Louisiana Academic Libraries: Exploring Worker Status And Demographics, Justin Savage, Andrea Hebert, Catherine Baird
Workplace Bullying In Louisiana Academic Libraries: Exploring Worker Status And Demographics, Justin Savage, Andrea Hebert, Catherine Baird
Faculty Publications
Bullying is a phenomenon that exists across cultures, societies, and even species. It can be found everywhere, including the workplace. The present study investigates workplace bullying amongst an approximated census sample of Louisiana academic library workers. Using the Negative Acts Questionnaire—Revised (NAQ-R), the study explores the relationships between experiencing workplace bullying and librarian status, tenure status, years in the profession, age, gender, and race. Although no statistically significant relationships were found between variables, the findings add to a growing body of literature that explores the interrelations of demographic and environmental contexts and bullying experiences.
Influence Of Metabolic Interventions On Animal Aging And Lifespan, Bhaswati Ghosh
Influence Of Metabolic Interventions On Animal Aging And Lifespan, Bhaswati Ghosh
LSU Doctoral Dissertations
Aging is associated with metabolic rewiring. Most lifespan-extending longevity interventions target metabolic pathways. Genetic or pharmacological metabolic approaches that mediate longer lifespan and healthspan, are often linked to detrimental effects on human health. Here, I show that supplementation of botanical extracts from Artemisia scoparia (SCO), dramatically increases animal lifespan. Mechanistically, this lifespan extension is dependent on AMPK-DAF-16 signaling via inhibition of the insulin pathway. In SCO-fed worms, longer lifespan was accompanied by higher fat storage and improved resiliency to age-related physiological stress. Notably, DAF-16, the master regulator of longevity, activated the fatty acid desaturation processes, which promoted the accumulation of …
Increased Ploidy Of Butomus Umbellatus In Introduced Populations Is Not Associated With Higher Phenotypic Plasticity To N And P, Nathan E. Harms, James T. Cronin, John F. Gaskin
Increased Ploidy Of Butomus Umbellatus In Introduced Populations Is Not Associated With Higher Phenotypic Plasticity To N And P, Nathan E. Harms, James T. Cronin, John F. Gaskin
Faculty Publications
Separate introductions or post-introduction evolution may lead to multiple invader genotypes or cytotypes that differ in growth rates, biomass or chemical profile responses (phenotype) to a range of environments. If the invader has high trait plasticity to a range of resource levels, then sediment N or P enrichment may enhance invasiveness. However, the ways in which ploidy, plasticity, and available N or P interact are unknown for most species despite the potential to explain spread and impacts by invaders with multiple introduced lineages. We conducted a common garden experiment with four triploid and six diploid populations of Butomus umbellatus, collected …
The Age-Dependent Characterization Of The Er-Alpha Positive Breast Cancer Tumor Microenvironment, Katie Marie Hamel
The Age-Dependent Characterization Of The Er-Alpha Positive Breast Cancer Tumor Microenvironment, Katie Marie Hamel
LSU Doctoral Dissertations
In disease states such as cancer, endocrine and paracrine signals from adipose tissue contribute to cancer progression and drug resistance. Young individuals diagnosed with estrogen receptor-alpha positive (ER-a+) breast cancer have an observed increase in resistance to endocrine therapies. This suggests that an alternative estrogen signaling pathway is active within these tumors. Despite this, the effects of stromal age on the endocrine response in breast cancer is not well known. Here, we review and highlight the involvement of the stromal age in both tumorigenesis and physiological wound healing. To identify specific differences between young and aged ER-a+ breast tumors, RNA …
Patchy Fires Promote Regeneration Of Longleaf Pine (Pinus Palustris Mill.) In Pine Savannas, Kevin M. Robertson, William J. Platt, Charles E. Faires
Patchy Fires Promote Regeneration Of Longleaf Pine (Pinus Palustris Mill.) In Pine Savannas, Kevin M. Robertson, William J. Platt, Charles E. Faires
Faculty Publications
© 2019 by the authors. Research Highlights: Spatial patterns of fire spread and severity influence survival of juvenile pines in longleaf pine savannas. Small areas that do not burn during frequent fires facilitate formation of patches of even-aged longleaf pine juveniles. These regeneration patches are especially associated with inner portions of openings (gaps) and where canopy trees have died in recent decades. Patterns of prescribed fire can thus have an important influence on stand dynamics of the dominant tree in pine savannas. Background and Objectives: Savannas are characterized by bottlenecks to tree regeneration. In pine savannas, longleaf pine is noted …
Elusive Utopia: The Struggle For Racial Equality In Oberlin, Ohio, Angela F. Murphy
Elusive Utopia: The Struggle For Racial Equality In Oberlin, Ohio, Angela F. Murphy
Civil War Book Review
Elusive Utopia is a history of race relations in Oberlin, Ohio from its founding in 1833 through the early 1920s. It is the culmination of decades of study by its authors Gary J. Kornblith and Carol Lasser, both of whom are emeritus professors of history at Oberlin College. Their new book offers a significant widening of scope in our understanding of Oberlin in several ways. First, it expands the investigation of race relations in Oberlin beyond a focus on the progressive interracial college for which Oberlin is famous, taking into consideration the trajectory of race relations in the larger town.
Prolonged Viral Replication And Longitudinal Viral Dynamic Differences Among Respiratory Syncytial Virus Infected Infants, Monica E. Brint, Joshua M. Hughes, Aditya Shah, Chelsea R. Miller, Lisa G. Harrison, Elizabeth A. Meals, Jacqueline Blanch, Charlotte R. Thompson, Stephania A. Cormier, John P. Devincenzo
Prolonged Viral Replication And Longitudinal Viral Dynamic Differences Among Respiratory Syncytial Virus Infected Infants, Monica E. Brint, Joshua M. Hughes, Aditya Shah, Chelsea R. Miller, Lisa G. Harrison, Elizabeth A. Meals, Jacqueline Blanch, Charlotte R. Thompson, Stephania A. Cormier, John P. Devincenzo
Faculty Publications
© 2017 2017 International Pediatric Research Foundation, Inc. BackgroundLongitudinal respiratory syncytial virus (RSV) dynamics have not been well studied despite the existence of factors favoring prolonged RSV replication including high mutation rates allowing rapid evolution and potential escape from immune control. We therefore measured viral load in previously RSV-naive infants over prolonged time spans.MethodsDuring 2014-2015, quantitative nasal aspirates were collected from 51 RSV-PCR+ infants. Multiple parallel assessments of viral loads were quantified at each collected time point using a well-validated real-time quantitative reverse transcriptase polymerase chain reaction assay. After observing viral load rebound phenomenon in some infants, the viral dynamics …
Mining Social Media Data For Improved Understanding Of Disaster Resilience, Lei Zou
Mining Social Media Data For Improved Understanding Of Disaster Resilience, Lei Zou
LSU Doctoral Dissertations
Disaster resilience is the capacity of a community to ‘bounce back’ from disastrous events, by effecting resilience building activities through the four phases of emergency management – preparedness, response, recovery, and mitigation. However, data describing a community’s behaviors in each phase are difficult to access in traditional databases. Social media data provide an innovative data source to better understand communities’ responses and behaviors in each phase of emergency management during disasters, and thus could ultimately monitor and enhance disaster resilience. This study analyzes the spatial-temporal patterns of Twitter activities during Hurricane Sandy, which struck the northeastern United States on October …
Evolutionary Interactions Of Feather Molt In Birds, Ryan Scott Terrill
Evolutionary Interactions Of Feather Molt In Birds, Ryan Scott Terrill
LSU Doctoral Dissertations
The evolution of feathers was a key innovation for birds. The many functions that feathers provide have allowed birds to diversify into myriad habitats and styles of life. However, feathers are lightweight and break down, and must be replaced regularly in a process known as molt. The patterns and timing with which birds molt varies within and between species, and these different strategies are likely a product of the different ways birds use their feathers and the uneven distribution of resources available for molt in time and space. So far, no studies have attempted to place these strategies into an …
The Effect Of Demographic Correlations On The Stochastic Population Dynamics Of Perennial Plants, Aldo Compagnoni, Andrew J. Bibian, Brad M. Ochocki, Haldre S. Rogers, Emily L. Schultz, Michelle E. Sneck, Bret D. Elderd, Amy M. Iler, David W. Inouye, Hans Jacquemyn, Tom E.X. Miller
The Effect Of Demographic Correlations On The Stochastic Population Dynamics Of Perennial Plants, Aldo Compagnoni, Andrew J. Bibian, Brad M. Ochocki, Haldre S. Rogers, Emily L. Schultz, Michelle E. Sneck, Bret D. Elderd, Amy M. Iler, David W. Inouye, Hans Jacquemyn, Tom E.X. Miller
Faculty Publications
© 2016 by the Ecological Society of America. Understanding the influence of environmental variability on population dynamics is a fundamental goal of ecology. Theory suggests that, for populations in variable environments, temporal correlations between demographic vital rates (e.g., growth, survival, reproduction) can increase (if positive) or decrease (if negative) the variability of year-to-year population growth. Because this variability generally decreases long-term population viability, vital rate correlations may importantly affect population dynamics in stochastic environments. Despite long-standing theoretical interest, it is unclear whether vital rate correlations are common in nature, whether their directions are predominantly negative or positive, and whether they …
Quantifying Demographic Uncertainty: Bayesian Methods For Integral Projection Models, Bret D. Elderd, Tom E.X. Miller
Quantifying Demographic Uncertainty: Bayesian Methods For Integral Projection Models, Bret D. Elderd, Tom E.X. Miller
Faculty Publications
© 2016 by the Ecological Society of America. Integral projection models ( IPM s) are a powerful and popular approach to modeling population dynamics. Generalized linear models form the statistical backbone of an IPM . These models are typically fi t using a frequentist approach. We suggest that hierarchical Bayesian statistical approaches offer important advantages over frequentist methods for building and interpreting IPM s, especially given the hierarchical nature of most demographic studies. Using a stochastic IPM for a desert cactus based on a 10- year study as a worked example, we highlight the application of a Bayesian approach for …
Sites Of Indigenous Language Practice : Geography Of American Indian Language Policy, Thomas Pierre-Yves Brasdefer
Sites Of Indigenous Language Practice : Geography Of American Indian Language Policy, Thomas Pierre-Yves Brasdefer
LSU Doctoral Dissertations
For over 1.9 million indigenous people in the United States, speaking their native language has become a rare opportunity. There are several obstacles standing in their way, from geographically separated communities to hundreds of years of contrarian policies and sometimes a collective lack of interest. Today, indigenous language use has become an integral part of self-determination and political sovereignty, sometimes more so than a communicative activity. This dissertation examines the political steps taken by American Indian communities around the United States to ensure that their languages can still be spoken into the twenty-first century, and analyzes the complex implications of …
Small-Scale Variation In Fuel Loads Differentially Affects Two Co-Dominant Bunchgrasses In A Species-Rich Pine Savanna, Paul R. Gagnon, Kyle E. Harms, William J. Platt, Heather A. Passmore, Jonathan A. Myers
Small-Scale Variation In Fuel Loads Differentially Affects Two Co-Dominant Bunchgrasses In A Species-Rich Pine Savanna, Paul R. Gagnon, Kyle E. Harms, William J. Platt, Heather A. Passmore, Jonathan A. Myers
Faculty Publications
Ecological disturbances frequently control the occurrence and patterning of dominant plants in high-diversity communities like C 4 grasslands and savannas. In such ecosystems disturbance-related processes can have important implications for species, and for whole communities when those species are dominant, yet mechanistic understanding of such processes remains fragmentary. Multiple bunchgrass species commonly co-dominate disturbance-dependent and species-rich pine savannas, where small-scale fuel heterogeneity may influence bunchgrass survival and growth following fires. We quantified how fire in locally varying fuel loads influenced dynamics of dominant C 4 bunchgrasses in a species-rich pine savanna in southeastern Louisiana, USA. We focused on two congeneric, …
Plexus: A New Model For New Orleans Public Healthcare, Jonathan Lejune
Plexus: A New Model For New Orleans Public Healthcare, Jonathan Lejune
Honors Capstones
No abstract provided.
The Total Errors In Measuring E Peak For Gamma-Ray Bursts, Andrew C. Collazzi, Bradley E. Schaefer, Jeremy A. Moree
The Total Errors In Measuring E Peak For Gamma-Ray Bursts, Andrew C. Collazzi, Bradley E. Schaefer, Jeremy A. Moree
Faculty Publications
Of all the observable quantities for gamma-ray bursts (GRBs), one of the most important is E peak. E peak is defined as the peak of the νF ν power spectrum from the prompt emission. While E peak has been extensively used in the past, for example with luminosity indicators, it has not been thoroughly examined for possible sources of scatter. In the literature, the reported error bars for E peak are the simple Poisson statistical errors. Additional uncertainties arise due to the choices made by analysts in determining E peak (e.g., the start and stop times of integration), imperfect knowledge …
The Ecology Of Congeneric Resprouters And Reseeders (Hypericum Spp.) Along Fire-Frequented Pine Savanna Ecoclines, Raelene Marie Crandall
The Ecology Of Congeneric Resprouters And Reseeders (Hypericum Spp.) Along Fire-Frequented Pine Savanna Ecoclines, Raelene Marie Crandall
LSU Doctoral Dissertations
Resprouting and reseeding shrubs are predicted to be restricted to habitats with long and short return intervals of natural disturbances, respectively. Nonetheless, resprouters and reseeders co-occur along Gulf of Mexico coastal ecoclines where lightning-ignited fires were historically frequent. In this collection of studies, I examine fire responses, habitat associations, distribution limits, and seedling recruitment of Hypericum species along ecoclines in pine savannas of the St. Joe Bay State Buffer Preserve in Gulf County of Florida. In this area, ecoclines are characterized by topographic, soil moisture, and fire heterogeneity gradients. Hypericum microsepalum, an obligate resprouter, primarily resprouts following disturbances that …
The Influence Of Budget Allocation By Function On Student Retention Of Public Community Colleges In The Sixteen States In The Southern Region Education Board, Clayton Clendenin Burton
The Influence Of Budget Allocation By Function On Student Retention Of Public Community Colleges In The Sixteen States In The Southern Region Education Board, Clayton Clendenin Burton
LSU Doctoral Dissertations
Stakeholders of higher education expect a positive return for their investment. One of the measures of success for higher education is persistence; one of the measures of persistence is retention rate. One segment of higher education, community colleges, receives a significant outlay of public resources in terms of government appropriations, student financial aid, and individual investment. This study follows the framework of Ryan (2004) and Gansemer-Topf and Schuh (2006) who successfully created models using the allocation of financial resources to predict graduation and retention rates for four-year colleges. Using data from the U. S. Department of Education’s Integrated Postsecondary Education …
Comprehensive Photometric Histories Of All Known Galactic Recurrent Novae, Bradley E. Schaefer
Comprehensive Photometric Histories Of All Known Galactic Recurrent Novae, Bradley E. Schaefer
Faculty Publications
I collect virtually all photometry of the 10 known galactic recurrent novae (RNe) and their 37 known eruptions. This consists of my modern measures of nearly all archival plates (providing the only data for half of 37 known eruptions), my own 10,000 CCD magnitudes from 1987 to present (providing virtually all of the magnitudes in quiescence for seven RNe), over 140,000 visual magnitude estimates recorded by amateur astronomers (who discovered half the known eruptions), and the small scattering of magnitudes from all the literature. From this, I produce various uniform products: (1) BVRIJHK comparison star magnitudes and BV comparison star …
Rapid Assessment Of Genetic Ancestry In Populations Of Unknown Origin By Genome-Wide Genotyping Of Pooled Samples, Charleston W.K. Chiang, Zofia K.Z. Gajdos, Joshua M. Korn, Finny G. Kuruvilla, Johannah L. Butler, Rachel Hackett, Candace Guiducci, Thutrang T. Nguyen, Rainford Wilks, Terrence Forrester, Christopher A. Haiman, Katherine D. Henderson, Loic Le Marchand, Brian E. Henderson, Mark R. Palmert, Colin A. Mckenzie, Helen N. Lyon, Richard S. Cooper, Xiaofeng Zhu, Joel N. Hirschhorn
Rapid Assessment Of Genetic Ancestry In Populations Of Unknown Origin By Genome-Wide Genotyping Of Pooled Samples, Charleston W.K. Chiang, Zofia K.Z. Gajdos, Joshua M. Korn, Finny G. Kuruvilla, Johannah L. Butler, Rachel Hackett, Candace Guiducci, Thutrang T. Nguyen, Rainford Wilks, Terrence Forrester, Christopher A. Haiman, Katherine D. Henderson, Loic Le Marchand, Brian E. Henderson, Mark R. Palmert, Colin A. Mckenzie, Helen N. Lyon, Richard S. Cooper, Xiaofeng Zhu, Joel N. Hirschhorn
Faculty Publications
As we move forward from the current generation of genome-wide association (GWA) studies, additional cohorts of different ancestries will be studied to increase power, fine map association signals, and generalize association results to additional populations. Knowledge of genetic ancestry as well as population substructure will become increasingly important for GWA studies in populations of unknown ancestry. Here we propose genotyping pooled DNA samples using genome-wide SNP arrays as a viable option to efficiently and inexpensively estimate admixture proportion and identify ancestry informative markers (AIMs) in populations of unknown origin. We constructed DNA pools from African American, Native Hawaiian, Latina, and …
Gamma Ray Burst Redshift Catalog And Applications, Limin Xiao
Gamma Ray Burst Redshift Catalog And Applications, Limin Xiao
LSU Doctoral Dissertations
The measurement of redshifts for gamma-ray bursts (GRBs) is an important issue for the study of the high redshift universe and cosmology. We developed a program to estimate the redshifts for GRBs from the original light curves and spectra, aiming to get redshifts for bursts without spectroscopic or photometric redshifts. We derive the luminosity indicators from the light curves and spectra of each burst, including the lag time between low and high photon energy light curves, the variability of the light curve, the peak energy of the spectrum, the number of peaks in the light curve, and the minimum rise …
Population Genetics And Systematics Of A Species-Rich Clade Of Neotropical Reef Fishes, The Tubeblenny Genus Acanthemblemaria, Ron Israel Eytan
Population Genetics And Systematics Of A Species-Rich Clade Of Neotropical Reef Fishes, The Tubeblenny Genus Acanthemblemaria, Ron Israel Eytan
LSU Doctoral Dissertations
Neotropical coral reef fish communities are species-poor compared to those of the Indo-West Pacific. An exception to that pattern is the blenny clade Chaenopsidae, one of only three coral reef fish families endemic to the Neotropics. Within the chaenopsids, the genus Acanthemblemaria is the most species-rich. To understand the origin and maintenance of genetic and species diversity in these fishes, I characterized the population genetics for two Acanthemblemaria species, reconstructed the phylogeny of the group, and identified suites of correlated morphological characters responsible for the distinctive skull morphology of these fishes. By combining nuclear and mitochondrial sequence data I was …
Estimating Redshifts For Long Gamma-Ray Bursts, Limin Xiao, Bradley E. Schaefer
Estimating Redshifts For Long Gamma-Ray Bursts, Limin Xiao, Bradley E. Schaefer
Faculty Publications
The measurement of redshifts for gamma-ray bursts (GRBs) is an important issue for the study of the high redshift universe and cosmology. We are constructing a program to estimate the redshifts for GRBs from the original Swift light curves and spectra, aiming to get redshifts for the Swift bursts without spectroscopic or photometric redshifts. We derive the luminosity indicators from the light curves and spectra of each burst, including the lag time between low and high photon energy light curves, the variability of the light curve, the peak energy of the spectrum, the number of peaks in the light curve, …
Bias In Population Growth Rate Estimation: Sparse Data, Partial Life Cycle Analysis And Jensen's Inequality, Jason S. Grear, Bret D. Elderd
Bias In Population Growth Rate Estimation: Sparse Data, Partial Life Cycle Analysis And Jensen's Inequality, Jason S. Grear, Bret D. Elderd
Faculty Publications
Demographic matrix models have become an integral part of population viability analysis for threatened and endangered species, but their use is often limited by data availability. A common solution to this problem is to assume constant annual rates within a multi-year stage. Partial life cycle analysis (PLC), which incorporates only juvenile and adult stages, is a noteworthy example of this approach because it has been described in the literature as a reliable approximation of age-structured populations. However, we predict from Jensen's Inequality that the required lumping of age classes leads to over- or underestimation of population fitness when survival rates …
Density, Territory Size, And Long-Term Spatial Dynamics Of A Guild Of Terrestrial Insectivorous Birds Near Manaus, Brazil, Philip C. Stouffer
Density, Territory Size, And Long-Term Spatial Dynamics Of A Guild Of Terrestrial Insectivorous Birds Near Manaus, Brazil, Philip C. Stouffer
Faculty Publications
From 1994 to 2003, I annually surveyed terrestrial insectivorous birds in a 100-ha plot within continuous rainforest near Manaus, Brazil. I used spot-map registrations and radiotagged birds to estimate territory size and density on the plot for 13 species. As in the few previous studies of Amazonian birds, territory sizes were large (mean = 13.0 ha) and densities were low (mean = 3.4 pairs per 100 ha). The most common species, Formicarius colma, was the only species with >10 pairs per 100 ha, and one of four species (with Myrmeciza ferruginea, Conopophaga aurita, and Corythopis torquaius) to have territories of …
Rapid Decay Of Tree-Community Composition In Amazonian Forest Fragments, William F. Laurance, Henrique E.M. Nascimento, Susan G. Laurance, Ana Andrade, José E.L.S. Ribeiro, Juan Pablo Giraldo, Thomas E. Lovejoy, Richard Condit, Jerome Chave, Kyle E. Harms, Sammya D'Angelo
Rapid Decay Of Tree-Community Composition In Amazonian Forest Fragments, William F. Laurance, Henrique E.M. Nascimento, Susan G. Laurance, Ana Andrade, José E.L.S. Ribeiro, Juan Pablo Giraldo, Thomas E. Lovejoy, Richard Condit, Jerome Chave, Kyle E. Harms, Sammya D'Angelo
Faculty Publications
Forest fragmentation is considered a greater threat to vertebrates than to tree communities because individual trees are typically long-lived and require only small areas for survival. Here we show that forest fragmentation provokes surprisingly rapid and profound alterations in Amazonian tree-community composition. Results were derived from a 22-year study of exceptionally diverse tree communities in 40 1-ha plots in fragmented and intact forests, which were sampled repeatedly before and after fragment isolation. Within these plots, trajectories of change in abundance were assessed for 267 genera and 1,162 tree species. Abrupt shifts in floristic composition were driven by sharply accelerated tree …
Comparing The Direct And Community-Mediated Effects Of Disturbance On Plant Population Dynamics: Flooding, Herbivory And Mimulus Guttatus, Bret D. Elderd, Dan F. Doak
Comparing The Direct And Community-Mediated Effects Of Disturbance On Plant Population Dynamics: Flooding, Herbivory And Mimulus Guttatus, Bret D. Elderd, Dan F. Doak
Faculty Publications
Competition, trophic interactions and abiotic disturbances play important roles in governing plant population dynamics, yet few studies have addressed their relative contributions or interacting effects. We used Life Table Response Experiment (LTRE) analysis, coupled with stochastic analyses, to examine how a major abiotic disturbance, flooding, influences the fitness and population growth of a common riparian plant, Mimulus guttatus, and how this effect compares and interacts with that exerted by herbivory. We also extended LTRE analysis to include nested factors, which enabled us to examine differences across experimental sites. These spatial contributions to changes in population growth rate, λ, were compared …
Press Street: A Concept For Preserving, Reintroducing And Fostering Local History, Brian J. Mcbride
Press Street: A Concept For Preserving, Reintroducing And Fostering Local History, Brian J. Mcbride
LSU Master's Theses
To encourage increased stability in declining neighborhoods, government planning agencies and other land developers, continuously search for solutions to improve the quality of life for people living in communities in need of revitalization and a boost to their local economy. Studies have shown that well developed greenways and other public open spaces are improving the economic stability for many neighborhoods. Consequently, it is the creation of successful parks and public open spaces that have been found to be the first steps to improving such communities (The Trust for Public Land). If creating parks is the key to saving neighborhoods, can …
The Effectiveness Of Student Support Services At A Research Extensive University In The South, Eric Lyle Penalber
The Effectiveness Of Student Support Services At A Research Extensive University In The South, Eric Lyle Penalber
LSU Doctoral Dissertations
The primary purpose of this study was to determine the influence of level of participation in services provided by the Student Support Services (SSS) Program on the grade point average, retention, and the six-year graduation rate of first-time entering freshmen who also entered the SSS program at a research extensive university in the South. Participants in the study were one hundred, fifty-two (152) SSS students who entered this university in the fall of 1996 and fall of 1997. Tinto’s (1987) longitudinal model of institutional departure was used as the conceptual framework for this study. Services provided by the SSS program …
Conserving Slow-Growing, Long-Lived Tree Species: Input From The Demography Of A Rare Understory Conifer, Taxus Floridana, Charles Kwit, Carol C. Horvitz, William J. Platt
Conserving Slow-Growing, Long-Lived Tree Species: Input From The Demography Of A Rare Understory Conifer, Taxus Floridana, Charles Kwit, Carol C. Horvitz, William J. Platt
Faculty Publications
Although land preservation and promotion of successful regeneration are important conservation actions, their ability to increase population growth rates of slow-growing, long-lived trees is limited. We investigated the demography of Taxus floridana Nutt., a rare understory conifer, in three populations in different ravine forests spanning its entire geographic range along the Apalachicola River Bluffs in northern Florida (U.S.A.). We examined spatial and temporal patterns in demographic parameters and projected population growth rates by using four years of data on the recruitment and survival of seedlings and established stems, and on diameter growth from cross-sections of dead stems. All populations experienced …
A Spatial Analysis Of The Smallpox Epidemic In Sheffield, United Kingdom, 1887-1888, Ann-Marie Cain
A Spatial Analysis Of The Smallpox Epidemic In Sheffield, United Kingdom, 1887-1888, Ann-Marie Cain
LSU Master's Theses
One of today's most fecund fields of research in medical geography involves using historical datasets from past epidemics and contemporary cadastre maps to plot the course of the contagion. The purpose is to study the spatial patterns of diseases that are rare or extinct today but still have large research value. The best example of this problem is smallpox. This project involves taking one of the most complete records of a smallpox epidemic, plotting the cases in a geographic information system (GIS), and exploring the spatial patterns using statistical software. As one of the most contagious and damaging diseases to …