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Responses Of Phytoplankton Communities Driven By Differences Of Source Water Intrusions In The El Niño And La Niña Events In The Taiwan Strait During The Early Spring, Yanping Zhong, Edward A. Laws, Jiafu Zhuang, Jingxiao Wang, Peixuan Wang, Caiyun Zhang, Xin Liu, Bangqin Huang Sep 2022

Responses Of Phytoplankton Communities Driven By Differences Of Source Water Intrusions In The El Niño And La Niña Events In The Taiwan Strait During The Early Spring, Yanping Zhong, Edward A. Laws, Jiafu Zhuang, Jingxiao Wang, Peixuan Wang, Caiyun Zhang, Xin Liu, Bangqin Huang

Faculty Publications

The El Niño Southern Oscillation (ENSO) is one of the most important drivers of interannual variations of marine ecosystems, especially monsoonal ecosystems. The channel effect in a strait amplifies the impact of monsoons and may be an ideal area to study ecosystem responses to ENSO events. Previous studies have shown that physical processes in the Taiwan Strait (TWS) vary during the different ENSO phases, but the biological responses are still unclear. In this study, we found clear differences in the physical, chemical, and biological characteristics of the TWS between different ENSO phases based on data from satellites and field cruises …

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Applications Of A Patient-Specific Whole-Body Ct-Mesh Hybrid Computational Phantom In Second Cancer Risk Prediction, Erika Kollitz, Moritz Roew, Haegin Han, Marco Pinto, Florian Kamp, Chan Hyeong Kim, Marco Schwarz, Claus Belka, Wayne Newhauser, Katia Parodi, George Dedes Sep 2022

Applications Of A Patient-Specific Whole-Body Ct-Mesh Hybrid Computational Phantom In Second Cancer Risk Prediction, Erika Kollitz, Moritz Roew, Haegin Han, Marco Pinto, Florian Kamp, Chan Hyeong Kim, Marco Schwarz, Claus Belka, Wayne Newhauser, Katia Parodi, George Dedes

Faculty Publications

Objective. CT-mesh hybrid phantoms (or ‘hybrid(s)’) made from integrated patient CT data and mesh-type reference computational phantoms (MRCPs) can be beneficial for patient-specific whole-body dose evaluation, but this benefit has yet to be evaluated for second cancer risk prediction. The purpose of this study is to compare the hybrid’s ability to predict risk throughout the body with a patient-scaled MRCP against ground truth whole-body CTs (WBCTs). Approach. Head and neck active scanning proton treatment plans were created for and simulated on seven hybrids and the corresponding scaled MRCPs and WBCTs. Equivalent dose throughout the body was calculated and input into …

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Degumming Of Hemp Fibers Using Combined Microwave Energy And Deep Eutectic Solvent Treatment, Bulbul Ahmed, Qinglin Wu, Hai Lin, Jaegyoung Gwon, Ioan Negulescu, Bruce Cameron Sep 2022

Degumming Of Hemp Fibers Using Combined Microwave Energy And Deep Eutectic Solvent Treatment, Bulbul Ahmed, Qinglin Wu, Hai Lin, Jaegyoung Gwon, Ioan Negulescu, Bruce Cameron

Faculty Publications

Hemp bast fibers were degummed using combined microwave energy (MWE) and deep eutectic solvent (DES) to generate pure hemp cellulose fibers for potential textile applications. The properties of the degummed fibers were investigated and compared with those of the alkali-treated fibers using several analytical techniques. Results revealed that hemp fiber surface underwent dramatic structural disruption during the pretreatment, due to the removal of “gummy” compounds (i.e., pectin, oil, wax, etc.), lignin, and amorphous cellulose. The treated fibers had much enhanced thermal stability due to the removal of the gummy materials. The reduced enthalpy (171.34 J/g) of MWE-DES treated fibers at …

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Pest Population Dynamics Are Related To A Continental Overwintering Gradient, Douglas Lawton, Anders S. Huseth, George G. Kennedy, Amy C. Morey, William D. Hutchison, Dominic D. Reisig, Seth J. Dorman, De Shae Dillard, Robert C. Venette, Russell L. Groves, John J. Adamczyk, Izailda Barbosa Dos Santos, Tracey Baute, Sebe Brown, Eric Burkness, Ashley Dean, Galen P. Dively, Hélène B. Doughty, Shelby J. Fleischer, Jessica Green, Jeremy K. Greene, Krista Hamilton, Erin Hodgson, Thomas Hunt, David Kerns, Billy Rogers Leonard, Sean Malone, Fred Musser, David Owens, John C. Palumbo, Silvana Paula-Moraes, Julie A. Peterson, Ricardo Ramirez Sep 2022

Pest Population Dynamics Are Related To A Continental Overwintering Gradient, Douglas Lawton, Anders S. Huseth, George G. Kennedy, Amy C. Morey, William D. Hutchison, Dominic D. Reisig, Seth J. Dorman, De Shae Dillard, Robert C. Venette, Russell L. Groves, John J. Adamczyk, Izailda Barbosa Dos Santos, Tracey Baute, Sebe Brown, Eric Burkness, Ashley Dean, Galen P. Dively, Hélène B. Doughty, Shelby J. Fleischer, Jessica Green, Jeremy K. Greene, Krista Hamilton, Erin Hodgson, Thomas Hunt, David Kerns, Billy Rogers Leonard, Sean Malone, Fred Musser, David Owens, John C. Palumbo, Silvana Paula-Moraes, Julie A. Peterson, Ricardo Ramirez

Faculty Publications

Overwintering success is an important determinant of arthropod populations that must be considered as climate change continues to influence the spatiotemporal population dynamics of agricultural pests. Using a long-term monitoring database and biologically relevant overwintering zones, we modeled the annual and seasonal population dynamics of a common pest, Helicoverpa zea (Boddie), based on three overwintering suitability zones throughout North America using four decades of soil temperatures: the southern range (able to persist through winter), transitional zone (uncertain overwintering survivorship), and northern limits (unable to survive winter). Our model indicates H. zea population dynamics are hierarchically structured with continental-level effects that …

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The Matricellular Protein Sparc Induces Inflammatory Interferon-Response In Macrophages During Aging, Seungjin Ryu, Sviatoslav Sidorov, Eric Ravussin, Maxim Artyomov, Akiko Iwasaki, Andrew Wang, Vishwa Deep Dixit Sep 2022

The Matricellular Protein Sparc Induces Inflammatory Interferon-Response In Macrophages During Aging, Seungjin Ryu, Sviatoslav Sidorov, Eric Ravussin, Maxim Artyomov, Akiko Iwasaki, Andrew Wang, Vishwa Deep Dixit

Clinical Research Faculty Publications

The risk of chronic diseases caused by aging is reduced by caloric restriction (CR)-induced immunometabolic adaptation. Here, we found that the matricellular protein, secreted protein acidic and rich in cysteine (SPARC), was inhibited by 2 years of 14% sustained CR in humans and elevated by obesity. SPARC converted anti-inflammatory macrophages into a pro-inflammatory phenotype with induction of interferon-stimulated gene (ISG) expression via the transcription factors IRF3/7. Mechanistically, SPARC-induced ISGs were dependent on toll-like receptor-4 (TLR4)-mediated TBK1, IRF3, IFN-β, and STAT1 signaling without engaging the Myd88 pathway. Metabolically, SPARC dampened mitochondrial respiration, and inhibition of glycolysis abrogated ISG induction by SPARC …

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Stereoisomers Of An Aryl Pyrazole Glucocorticoid Receptor Agonist Scaffold Elicit Differing Anti-Inflammatory Responses, Ashley M. Lato, Susan J. Burke, Maggie P. Ducote, Brandon J. Kennedy, J. Jason Collier, Shawn R. Campagna Sep 2022

Stereoisomers Of An Aryl Pyrazole Glucocorticoid Receptor Agonist Scaffold Elicit Differing Anti-Inflammatory Responses, Ashley M. Lato, Susan J. Burke, Maggie P. Ducote, Brandon J. Kennedy, J. Jason Collier, Shawn R. Campagna

Division of Basic Science Faculty Publications

Glucocorticoids (GCs) are heavily prescribed to control inflammation in various human diseases; however, side effects associated with GCs are well documented and lead to serious metabolic and immunological complications with long-term use. The paradigm for GC function includes two well described modes of activity: dimer formation of the glucocorticoid receptor (GR) promotes transactivation, while monomeric interaction with co-regulators promotes transrepression. Previously, a set of aryl pyrazole-derived glucocorticoid receptor agonists (APGRAs) with potency rivaling current commercially available glucocorticoids were described. In this study, a further series of existing and novel stereopure APGRAs were thoroughly examined for biological activity and evaluated for …

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Effects Of Sensory Cues On Product Acceptability And Consumer Perceptions, Emotions, And Behavior, Cristhiam Gurdian Curran Sep 2022

Effects Of Sensory Cues On Product Acceptability And Consumer Perceptions, Emotions, And Behavior, Cristhiam Gurdian Curran

LSU Doctoral Dissertations

Visual and cognitive cues can affect overall liking (OL) and consumer perceptions, emotions, and behavior. The first study explored the effect of product color difference on the liking, perception, and purchase intent (PI) of cheese-flavored-tortilla chips (CFTC) formulations (A and B) on serving plates (plastic, foam, and paper). Color differences between formulations influenced crunchiness and saltiness liking and perception, which together with overall flavor liking and formulation, mainly determined CFTC OL. Although having similar fracturability (N) and sodium content, formulation A had higher crunchiness and saltiness likings. PI was influenced by crunchiness, saltiness, and OF liking with 37, 49, and …

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Endothelin-1 As A Novel Target For The Prevention Of Metabolic Dysfunction With Intermittent Hypoxia In Male Participants, Jacqueline K. Limberg, Sarah E. Baker, Humphrey G. Petersen-Jones, Winston Guo, An Huang, Michael D. Jensen, Prachi Singh Sep 2022

Endothelin-1 As A Novel Target For The Prevention Of Metabolic Dysfunction With Intermittent Hypoxia In Male Participants, Jacqueline K. Limberg, Sarah E. Baker, Humphrey G. Petersen-Jones, Winston Guo, An Huang, Michael D. Jensen, Prachi Singh

Clinical Research Faculty Publications

We examined the effect of intermittent hypoxia (IH, a hallmark feature of sleep apnea) on adipose tissue lipolysis and the role of endothelin-1 (ET-1) in this response. We hypothesized that IH can increase ET-1 secretion and plasma free fatty acid (FFA) concentrations. We further hypothesized that inhibition of ET-1 receptor activation with bosentan could prevent any IH-mediated increase in FFA. To test this hypothesis, 16 healthy male participants (32 ± 5 yr, 26 ± 2 kg/m2) were exposed to 30 min of IH in the absence (control) and presence of bosentan (62.5 mg oral twice daily for 3 days prior). …

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Comparative Efficacy Of A Fungal Entomopathogen With A Broad Host Range Against Two Human-Associated Pests, Aaron R. Ashbrook, Aram Mikaelyan, Coby Schal Sep 2022

Comparative Efficacy Of A Fungal Entomopathogen With A Broad Host Range Against Two Human-Associated Pests, Aaron R. Ashbrook, Aram Mikaelyan, Coby Schal

Faculty Publications

The ability of a fungal entomopathogen to infect an insect depends on a variety of factors, including strain, host, and environmental conditions. Similarly, an insect’s ability to prevent fungal infection is dependent on its biology, environment, and evolutionary history. Synanthropic pests have adapted to thrive in the indoor environment, yet they arose from divergent evolutionary lineages and occupy different feeding guilds. The hematophagous bed bug (Cimex lectularius) and omnivorous German cockroach (Blattella germanica) are highly successful indoors, but have evolved different physiological and behavioral adaptations to cope with the human-built environment, some of which also reduce the efficacy of fungal …

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Sci: A Bayesian Adaptive Phase I/Ii Dose-Finding Design Accounting For Semi-Competing Risks Outcomes For Immunotherapy Trials, Yifei Zhang, Beibei Guo, Sha Cao, Chi Zhang, Yong Zang Sep 2022

Sci: A Bayesian Adaptive Phase I/Ii Dose-Finding Design Accounting For Semi-Competing Risks Outcomes For Immunotherapy Trials, Yifei Zhang, Beibei Guo, Sha Cao, Chi Zhang, Yong Zang

Faculty Publications

An immunotherapy trial often uses the phase I/II design to identify the optimal biological dose, which monitors the efficacy and toxicity outcomes simultaneously in a single trial. The progression-free survival rate is often used as the efficacy outcome in phase I/II immunotherapy trials. As a result, patients developing disease progression in phase I/II immunotherapy trials are generally seriously ill and are often treated off the trial for ethical consideration. Consequently, the happening of disease progression will terminate the toxicity event but not vice versa, so the issue of the semi-competing risks arises. Moreover, this issue can become more intractable with …

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Redox-Engineering Enhances Maize Thermotolerance And Grain Yield In The Field, Stuart A. Sprague, Tej Man Tamang, Trevor Steiner, Qingyu Wu, Ying Hu, Tayebeh Kakeshpour, Jungeun Park, Jian Yang, Zhao Peng, Blake Bergkamp, Impa Somayanda, Morgan Peterson, Ely Oliveira Garcia, Yangfan Hao, Paul St. Amand, Guihua Bai, Paul A. Nakata, Ivo Rieu, David P. Jackson, Ninghui Cheng, Barbara Valent, Kendal D. Hirschi, Sv Krishna Jagadish, Sanzhen Liu, Frank F. White, Sunghun Park Sep 2022

Redox-Engineering Enhances Maize Thermotolerance And Grain Yield In The Field, Stuart A. Sprague, Tej Man Tamang, Trevor Steiner, Qingyu Wu, Ying Hu, Tayebeh Kakeshpour, Jungeun Park, Jian Yang, Zhao Peng, Blake Bergkamp, Impa Somayanda, Morgan Peterson, Ely Oliveira Garcia, Yangfan Hao, Paul St. Amand, Guihua Bai, Paul A. Nakata, Ivo Rieu, David P. Jackson, Ninghui Cheng, Barbara Valent, Kendal D. Hirschi, Sv Krishna Jagadish, Sanzhen Liu, Frank F. White, Sunghun Park

Faculty Publications

Increasing populations and temperatures are expected to escalate food demands beyond production capacities, and the development of maize lines with better performance under heat stress is desirable. Here, we report that constitutive ectopic expression of a heterologous glutaredoxin S17 from Arabidopsis thaliana (AtGRXS17) can provide thermotolerance in maize through enhanced chaperone activity and modulation of heat stress-associated gene expression. The thermotolerant maize lines had increased protection against protein damage and yielded a sixfold increase in grain production in comparison to the non-transgenic counterparts under heat stress field conditions. The maize lines also displayed thermotolerance in the reproductive stages, resulting in …

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Effect Of Two Strains Of Beauveria Bassiana On The Fecundity Of Nezara Viridula L. (Heteroptera: Pentatomidae), Maribel Portilla, Gadi V.P. Reddy, Moukaram Tertuliano Sep 2022

Effect Of Two Strains Of Beauveria Bassiana On The Fecundity Of Nezara Viridula L. (Heteroptera: Pentatomidae), Maribel Portilla, Gadi V.P. Reddy, Moukaram Tertuliano

Faculty Publications

The southern green stink bug (SGSB) Nezara viridula (L.) (Heteroptera: Pentatomidae), has become a significant pest of soybean and cotton in southern Central America and in the lower mid-southern U.S. A laboratory colony of SGSB was used to evaluate the effect of two isolates of Beauveria bassiana (Balsamo-Crivelli) Vuillemin (Hypocreales: Cordycipitaceae) including the commercial strain GHA and the Mississippi Delta native NI8 strain on the fecundity of this pest. Water control, Tween-80, and four concentrations of each strain (n × 104, 105, 106, and 107) were evaluated. Both native and commercial isolates with the highest concentrations were susceptible to the …

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Susceptibility Of Different Life Stages Of Kudzu Bug Megacopta Cribraria (F.) (Hemiptera: Plataspidae) To Two Different Native Strains Of Beauveria Bassiana, James Paul Glover, Maribel Portilla, Katherine Parys, Clint Allen, Justin George, Gadi V.P. Reddy Sep 2022

Susceptibility Of Different Life Stages Of Kudzu Bug Megacopta Cribraria (F.) (Hemiptera: Plataspidae) To Two Different Native Strains Of Beauveria Bassiana, James Paul Glover, Maribel Portilla, Katherine Parys, Clint Allen, Justin George, Gadi V.P. Reddy

Faculty Publications

This is the first study that examined and compared the survival, LC50, and RR50 estimates of Megacopta cribraria F. (Hemiptera: Plataspidae) nymphs and adults that were exposed to two native Beauveria bassiana isolates (Previously codified as NI8 and KUDSC strains) at four concentrations. The greatest reduction in survival and mortality was observed primarily on or after 10 d post-exposure to B. bassiana isolates. Survival of early instars (2nd, 3rd) were not affected by either strains or concentration at 3 d and 5 d post-exposure. Survival of later instars (5th) and adults was significantly reduced when exposed to the KUDSC strain …

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Roosting Ecology Of Gould's Wild Turkeys In Southeastern Arizona, Nicholas W. Bakner, Nathan Fyffe, Brittany Oleson, Alex Smallwood, James R. Heffelfinger, Michael J. Chamberlain, Bret A. Collier Sep 2022

Roosting Ecology Of Gould's Wild Turkeys In Southeastern Arizona, Nicholas W. Bakner, Nathan Fyffe, Brittany Oleson, Alex Smallwood, James R. Heffelfinger, Michael J. Chamberlain, Bret A. Collier

Faculty Publications

Availability of suitable roosting sites influences distribution of wild turkeys (Meleagris gallopavo) across the landscape. In semi-arid environments, roosts are limited to riparian corridors capable of supporting trees large enough to provide suitable roost sites. Gould's wild turkeys (M. g. mexicana) are spatially restricted to mountainous semi-arid areas of southwestern United States and Mexico, and information on their distribution and habitat use is limited. We evaluated roost site selection and fidelity of Gould's wild turkeys relative to environmental gradients and forested land cover during 2016–2017 in southeastern Arizona, USA. We monitored 51 global positioning system (GPS)-tagged individuals and collected 7,954 …

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Spatiotemporal Patterns Of Male And Female White-Tailed Deer On A Hunted Landscape, Dylan G. Stewart, William D. Gulsby, Stephen S. Ditchkoff, Bret A. Collier Sep 2022

Spatiotemporal Patterns Of Male And Female White-Tailed Deer On A Hunted Landscape, Dylan G. Stewart, William D. Gulsby, Stephen S. Ditchkoff, Bret A. Collier

Faculty Publications

Resource selection in sexually dimorphic ungulates is at least partially explained by sex-specific resource requirements and risk aversion strategies. Females generally spend more time in areas with less risk and abundant, high-quality forage due to their smaller body size. However, demographically variable responses to risk are context dependent, and few have concurrently quantified male and female behavior within areas with the same resource base. We captured 111 (54 males, 57 females) adult white-tailed deer (Odocoileus virginianus) from 2009 to 2018 on a site in South Carolina, USA, where hunters were the primary source of adult mortality. We fit each deer …

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Adipocyte-Specific Laminin Alpha 4 Deletion Preserves Adipose Tissue Health Despite Increasing Adiposity, Jennifer L. Bailey, David H. Burk, Susan J. Burke, Scott D. Reed, Sujoy Ghosh, Carrie M. Elks Sep 2022

Adipocyte-Specific Laminin Alpha 4 Deletion Preserves Adipose Tissue Health Despite Increasing Adiposity, Jennifer L. Bailey, David H. Burk, Susan J. Burke, Scott D. Reed, Sujoy Ghosh, Carrie M. Elks

Division of Basic Science Faculty Publications

Laminins are heterotrimeric glycoproteins with structural and functional roles in basement membranes. The predominant laminin alpha chain found in adipocyte basement membranes is laminin α4 (LAMA4). Global LAMA4 deletion in mice leads to reduced adiposity and increased energy expenditure, but also results in vascular defects that complicate the interpretation of metabolic data. Here, we describe the generation and initial phenotypic analysis of an adipocyte-specific LAMA4 knockout mouse (Lama4AKO). We first performed an in-silico analysis to determine the degree to which laminin α4 was expressed in human and murine adipocytes. Next, male Lama4AKO and control mice were fed chow or high-fat …

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Climate Trends And Behavior Of A Model Amazonian Terrestrial Insectivore, Black-Faced Antthrush, Indicate Adjustment To Hot And Dry Conditions, Vitek Jirinec, Elisa C. Elizondo, Patricia F. Rodrigues, Philip C. Stouffer Sep 2022

Climate Trends And Behavior Of A Model Amazonian Terrestrial Insectivore, Black-Faced Antthrush, Indicate Adjustment To Hot And Dry Conditions, Vitek Jirinec, Elisa C. Elizondo, Patricia F. Rodrigues, Philip C. Stouffer

Faculty Publications

Rainforest loss threatens terrestrial insectivorous birds throughout the world's tropics. Recent evidence suggests these birds are declining in undisturbed Amazonian rainforest, possibly due to climate change. Here, we first asked whether Amazonian terrestrial insectivorous birds were exposed to increasingly extreme ambient conditions using 38 years of climate data. We found long-term trends in temperature and precipitation at our study site, especially in the dry season, which was ~1.3°C hotter and 21% drier in 2019 than in 1981. Second, to test whether birds actively avoided hot and dry conditions, we used field sensors to identify periodic intervals of ambient extremes and …

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Applied Nutritional Investigationeffects Of Acute Arginine Supplementation On Neuroendocrine, Metabolic, Cardiovascular, And Mood Outcomes In Younger Men: A Double-Blind, Placebo-Controlled Trial, John W. Apolzan, Jesse A. Stein, Jennifer C. Rood, Robbie A. Beyl, Shengping Yang, Frank L. Greenway, Harris R. Lieberman Sep 2022

Applied Nutritional Investigationeffects Of Acute Arginine Supplementation On Neuroendocrine, Metabolic, Cardiovascular, And Mood Outcomes In Younger Men: A Double-Blind, Placebo-Controlled Trial, John W. Apolzan, Jesse A. Stein, Jennifer C. Rood, Robbie A. Beyl, Shengping Yang, Frank L. Greenway, Harris R. Lieberman

Clinical Research Faculty Publications

Objectives: Arginine is an amino-acid supplement and precursor for nitric-oxide synthesis, which affects various biologic processes. The objective of this study was to determine the effects of arginine supplementation on growth hormone (GH) and metabolic parameters. Methods: Thirty physically active, healthy men (age 18–39 y; body mass index: 18.5–25 kg/m2) were randomized in a double-blind, placebo-controlled, crossover trial. Arginine (10 g) and placebo (0 g) beverages were consumed after an overnight fast. Blood samples were collected at baseline and 1.5, 3.0, and 24 h after supplementation. The primary outcomes were serum GH and metabolomics. Also, amino acids, glucose, insulin, triacylglycerols, …

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Estimating R0 From Early Exponential Growth: Parallels Between 1918 Influenza And 2020 Sars-Cov-2 Pandemics, Grant Foster, Bret D. Elderd, Robert L. Richards, Tad Dallas Sep 2022

Estimating R0 From Early Exponential Growth: Parallels Between 1918 Influenza And 2020 Sars-Cov-2 Pandemics, Grant Foster, Bret D. Elderd, Robert L. Richards, Tad Dallas

Faculty Publications

The large spatial scale, geographical overlap, and similarities in transmission mode between the 1918 H1N1 influenza and 2020 SARS-CoV-2 pandemics together provide a novel opportunity to investigate relationships between transmission of two different diseases in the same location. To this end, we use initial exponential growth rates in a Bayesian hierarchical framework to estimate the basic reproductive number, R0, of both disease outbreaks in a common set of 43 cities in the United States. By leveraging multiple epidemic time series across a large spatial area, we are able to better characterize the variation in R0 across the United States. Additionally, …

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Development And Validation Of An Optimized Marker Set For Genomic Selection In Southern U.S. Rice Breeding Programs, Tommaso Cerioli, Christopher O. Hernandez, Brijesh Angira, Susan R. Mccouch, Kelly R. Robbins, Adam N. Famoso Sep 2022

Development And Validation Of An Optimized Marker Set For Genomic Selection In Southern U.S. Rice Breeding Programs, Tommaso Cerioli, Christopher O. Hernandez, Brijesh Angira, Susan R. Mccouch, Kelly R. Robbins, Adam N. Famoso

Faculty Publications

The potential of genomic selection (GS) to increase the efficiency of breeding programs has been clearly demonstrated; however, the implementation of GS in rice (Oryza sativa L.) breeding programs has been limited. In recent years, efforts have begun to work toward implementing GS into the Louisiana State University (LSU) Agricultural Center rice breeding program. One of the first steps for successful GS implementation is to establish a suitable marker set for the target germplasm and a reliable, cost-effective genotyping platform capable of providing informative marker data with an adequate turnaround time. The objective of this study was to develop a …

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Rates Of Future Climate Change In The Gulf Of Mexico And The Caribbean Sea: Implications For Coral Reef Ecosystems, A. E. Lawman, S. G. Dee, K. L. Delong, A. M.S. Correa Sep 2022

Rates Of Future Climate Change In The Gulf Of Mexico And The Caribbean Sea: Implications For Coral Reef Ecosystems, A. E. Lawman, S. G. Dee, K. L. Delong, A. M.S. Correa

Faculty Publications

Rising temperatures and ocean acidification due to anthropogenic climate change pose ominous threats to coral reef ecosystems in the Gulf of Mexico (GoM) and the western Caribbean Sea. Unfortunately, the once structurally complex coral reefs in the GoM and Caribbean have dramatically declined since the 1970s; relatively few coral reefs still exhibit a mean live coral cover of >10%. Additional work is needed to characterize future climate stressors on coral reefs in the GoM and the Caribbean Sea. Here, we use climate model simulations spanning the period of 2015–2100 to partition and assess the individual impacts of climate stressors on …

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Gabra5 Plays A Sexually Dimorphic Role In Pomc Neuron Activity And Glucose Balance, Zhou Pei, Yang He, Jonathan C. Bean, Yongjie Yang, Hailan Liu, Meng Yu, Kaifan Yu, Ilirjana Hyseni, Xing Cai, Hesong Liu, Na Qu, Longlong Tu, Kristine M. Conde, Mengjie Wang, Yongxiang Li, Na Yin, Nan Zhang, Junying Han, Camille H.S. Potts, Nikolas A. Scarcelli, Zili Yan, Pingwen Xu, Qi Wu, Yanlin He, Yong Xu, Chunmei Wang Aug 2022

Gabra5 Plays A Sexually Dimorphic Role In Pomc Neuron Activity And Glucose Balance, Zhou Pei, Yang He, Jonathan C. Bean, Yongjie Yang, Hailan Liu, Meng Yu, Kaifan Yu, Ilirjana Hyseni, Xing Cai, Hesong Liu, Na Qu, Longlong Tu, Kristine M. Conde, Mengjie Wang, Yongxiang Li, Na Yin, Nan Zhang, Junying Han, Camille H.S. Potts, Nikolas A. Scarcelli, Zili Yan, Pingwen Xu, Qi Wu, Yanlin He, Yong Xu, Chunmei Wang

Division of Basic Science Faculty Publications

Pro-opiomelanocortin (POMC) neurons are important for the regulation of body weight and glucose balance. The inhibitory tone to POMC neurons is mediated primarily by the GABA receptors. However, the detailed mechanisms and functions of GABA receptors are not well understood. The α5 subunit of GABAA receptor, Gabra5, is reported to regulate feeding, and we found that Gabra5 is highly expressed in POMC neurons. To explore the function of Gabra5 in POMC neurons, we knocked down Gabra5 specifically from mature hypothalamic POMC neurons using the clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 strategy. This POMC-specific knock-down of Gabra5 did not affect …

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Long-Term Changes In Avian Biomass And Functional Diversity Within Disturbed And Undisturbed Amazonian Rainforest, David A. Luther, W. Justin Cooper, Vitek Jirinec, Jared D. Wolfe, Cameron L. Rutt, Richard O. Bierregaard, Thomas E. Lovejoy, Philip C. Stouffer Aug 2022

Long-Term Changes In Avian Biomass And Functional Diversity Within Disturbed And Undisturbed Amazonian Rainforest, David A. Luther, W. Justin Cooper, Vitek Jirinec, Jared D. Wolfe, Cameron L. Rutt, Richard O. Bierregaard, Thomas E. Lovejoy, Philip C. Stouffer

Faculty Publications

Recent long-term studies in protected areas have revealed the loss of biodiversity, yet the ramifications for ecosystem health and resilience remain unknown. Here, we investigate how the loss of understory birds, in the lowest stratum of the forest, affects avian biomass and functional diversity in the Amazon rainforest. Across approximately 30 years in the Biological Dynamics of Forest Fragments Project, we used a historical baseline of avian communities to contrast the avian communities in today's primary forest with those in modern disturbed habitat. We found that in primary rainforest, the reduced abundance of insectivorous species led to reduced functional diversity, …

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The Effects Of Covid 19-Related Social Media Hate Crime On Asian And Asian Americans' Self-Esteem, Saachi Chugh Aug 2022

The Effects Of Covid 19-Related Social Media Hate Crime On Asian And Asian Americans' Self-Esteem, Saachi Chugh

LSU Master's Theses

The COVID-19 pandemic has changed the way people communicate, live, socialize and perhaps the way they feel about the Asian population. The United States has seen a rise in the Asian hate crimes on online and offline platforms since the beginning of the pandemic which has affected the overall well-being of the Asian population. To our knowledge, the present study is one of the first studies to address the effects of COVID 19-related online perceived racial discrimination on the self-esteem of Asians. Additional objectives were to reveal the different coping mechanisms being used by the Asian population to cope with …

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The Effects Of Covid 19-Related Social Media Hate Crime On Asian And Asian Americans' Self-Esteem, Saachi Chugh Aug 2022

The Effects Of Covid 19-Related Social Media Hate Crime On Asian And Asian Americans' Self-Esteem, Saachi Chugh

LSU Master's Theses

The COVID-19 pandemic has changed the way people communicate, live, socialize and perhaps the way they feel about the Asian population. The United States has seen a rise in the Asian hate crimes on online and offline platforms since the beginning of the pandemic which has affected the overall well-being of the Asian population. To our knowledge, the present study is one of the first studies to address the effects of COVID 19-related online perceived racial discrimination on the self-esteem of Asians. Additional objectives were to reveal the different coping mechanisms being used by the Asian population to cope with …

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Dynamic Modeling Of Aba-Dependent Expression Of The Arabidopsis Rd29a Gene, Ruth Ndathe, Renee Dale, Naohiro Kato Aug 2022

Dynamic Modeling Of Aba-Dependent Expression Of The Arabidopsis Rd29a Gene, Ruth Ndathe, Renee Dale, Naohiro Kato

Faculty Publications

The abscisic acid (ABA) signaling pathway is the key defense mechanism against drought stress in plants. In the pathway, signal transduction among four core proteins, pyrabactin resistance (PYR), protein phosphatase 2C (PP2C), sucrose-non-fermenting-1-related protein kinase 2 (SnRK2), and ABRE binding factor (ABF) leads to altered gene expression kinetics that is driven by an ABA-responsive element (ABRE). A most recent and comprehensive study provided data suggesting that ABA alters the expression kinetics in over 6,500 genes through the ABF-ABRE associations in Arabidopsis. Of these genes, termed ABA gene regulatory network (GRN), over 50% contain a single ABRE within 4 kb of …

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Mercury Biomagnification In A Coastal Louisiana Food Web Following The 2010 Deepwater Horizon Oil Spill, Katelyn J. Lamb, Stephen R. Midway, Rebecka L. Brasso, Paola C. López-Duarte, Matthew E. Kimball, Michael J. Polito Aug 2022

Mercury Biomagnification In A Coastal Louisiana Food Web Following The 2010 Deepwater Horizon Oil Spill, Katelyn J. Lamb, Stephen R. Midway, Rebecka L. Brasso, Paola C. López-Duarte, Matthew E. Kimball, Michael J. Polito

Faculty Publications

The estuarine environments surrounding coastal Louisiana create favorable conditions for microbially mediated mercury (Hg) methylation and subsequent bioaccumulation by biota. In 2010, the Deepwater Horizon (DWH) oil spill released large amounts of oil which, despite having low Hg concentrations, had the potential to influence methylmercury (MeHg) bioavailability in the coastal zone. To explore this possibility, we assessed Hg concentrations and trophodynamics in the coastal Louisiana food web prior to and immediately following the DWH oil spill and compared these metrics with an adjacent coastal ecosystem in the northern Gulf of Mexico. We found no differences in MeHg concentrations between oysters …

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Economically Optimizing Elevation Of New, Single-Family Residences For Flood Mitigation Via Life-Cycle Benefit-Cost Analysis, Ehab Gnan, Carol J. Friedland, Rubayet Bin Mostafiz, Md Adilur Rahim, Thanos Gentimis, Arash Taghinezhad, Robert V. Rohli Aug 2022

Economically Optimizing Elevation Of New, Single-Family Residences For Flood Mitigation Via Life-Cycle Benefit-Cost Analysis, Ehab Gnan, Carol J. Friedland, Rubayet Bin Mostafiz, Md Adilur Rahim, Thanos Gentimis, Arash Taghinezhad, Robert V. Rohli

Faculty Publications

Construction with freeboard—vertical height of a structure above the minimum required—is commonly accepted as a sound investment for flood hazard mitigation. However, determining the optimal height of freeboard poses a major decision problem. This research introduces a life-cycle benefit-cost analysis (LCBCA) approach for optimizing freeboard height for a new, single-family residence, while incorporating uncertainty, and, in the case of insured homes, considering the costs from losses, insurance, and freeboard (if any) to the homeowner and National Flood Insurance Program (NFIP) separately. Using a hypothetical, case study home in Metairie, Louisiana and U.S. Army Corps of Engineers design depth-damage functions for …

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Role Of Nucleobindin-2/Nesfatin-1 In The Regulation Of Energetic Status And Maternal Mouthbrooding In The Cichlid Fish, Astatotilapia Burtoni, Saachi Chugh Aug 2022

Role Of Nucleobindin-2/Nesfatin-1 In The Regulation Of Energetic Status And Maternal Mouthbrooding In The Cichlid Fish, Astatotilapia Burtoni, Saachi Chugh

LSU Master's Theses

Feeding and energetics are fundamental processes in all species that must also be balanced with reproductive investment. The peptide hormone nesfatin-1 is encoded by the nucleobindin-2(nucb2) gene and has recently emerged as a key player involved in both feeding and reproduction across vertebrates. How nesfatin-1 might help regulate trade-offs between feeding and reproduction, however, are relatively unexplored. The female cichlid fish Astatotilapia burtoniis an ideal system to examine the role of nesfatin-1 in regulating metabolic and reproductive functions because this species cycles between a gravid feeding state while preparing to mate, followed by a forced starvation …

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Impacts Of Ocean-Atmosphere Teleconnection Patterns On The South-Central United States, Robert V. Rohli, Gregg A. Snedden, Elinor R. Martin, Kristine L. Delong Aug 2022

Impacts Of Ocean-Atmosphere Teleconnection Patterns On The South-Central United States, Robert V. Rohli, Gregg A. Snedden, Elinor R. Martin, Kristine L. Delong

Faculty Publications

Recent research has linked the climate variability associated with ocean-atmosphere teleconnections to impacts rippling throughout environmental, economic, and social systems. This research reviews recent literature through 2021 in which we identify linkages among the major modes of climate variability, in the form of ocean-atmosphere teleconnections, and the impacts to temperature and precipitation of the South-Central United States (SCUSA), consisting of Arkansas, Louisiana, New Mexico, Oklahoma, and Texas. The SCUSA is an important areal focus for this analysis because it straddles the ecotone between humid and arid climates in the United States and has a growing population, diverse ecosystems, robust agricultural …

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