Life Sciences Commons^™

Phenotypic Variability In Ipsc-Induced Cardiomyocytes And Cardiac Fibroblasts Carrying Diverse Lmna Mutations, Jiajia Yang

USF Tampa Graduate Theses and Dissertations

Mutations in the LMNA gene (encoding lamin A/C) are the second most common cause of familial arrhythmogenic cardiomyopathy. Diverse LMNA variants in cardiomyocytes have been associated with cardiac phenotypes. Moreover, cardiac fibroblasts make up a large fraction of the myocardium's non-myocyte component, intrinsically linked to extracellular matrix synthesis and turnover as well as secreting large amounts of bioactive metabolites. However, our understanding of how different mutation sites and the non-myocyte niche mediate cardiomyocyte function is limited. To fill this gap, in this thesis I investigated the hypothesis that variable LMNA mutations have significant effects on the genetic, structure and electrophysiological …

Differences In Stronger Versus Weaker Firefighters In Selected Measures Of Power, Quincy Johnson, J. Jay Dawes, Melissa Uftring, Marcel Lopes Dos Santos, Davis Hale, Gabriel J. Sanders, Will Peveler, Roger O. Kollock

International Journal of Exercise Science

International Journal of Exercise Science 15(4): 552-560, 2022. Firefighters are required to perform a wide array of physically demanding job tasks, such as forcible entry, charged hose advances and victim extractions. An adequate level of muscular strength and power are required to successfully perform these tasks. The purpose of this study is to investigate the differences in stronger and weaker firefighters in measures of power. Archived data for twenty-seven (age = 34.3 ± 7.9 yr, body height = 176.3 ± 7.2 cm, body mass = 89.4 ± 15.7 kg) full-time firefighters were analyzed. Participants were placed into one of two …

Effects Of Six-Week Periodized Versus Non-Periodized Kettlebell Swing Training On Strength, Power And Muscular Endurance, Evaldo Rui Tavares Santos Junior, Belmiro De Salles, Ingrid Dias, Roberto Simão, Jeff Willardson

International Journal of Exercise Science

International Journal of Exercise Science 15(4): 526-540, 2022. The purpose of this study was to compare a periodized versus a non- periodized protocol of kettlebell (KTB) swings over six weeks on strength, power, and muscular endurance. Twenty-eight high intensity functional training (HIFT) practitioners were assigned to non- periodized (NPG = 11), periodized (PG = 11), or control groups (CG = 6). NPG used the same load (20 kg) throughout the training period while the PG used a step loading progression (with an added four kilograms every two weeks). Measures of strength and muscular endurance in the deadlift exercise, and power …

Effect Of Different Numbers Of Interset Antagonist Proprioceptive Neuromuscular Facilitation Stretching On The Total Number Of Repetitions For The Agonists, Humberto Miranda, Aline Aparecida De Oliveira, Juliana Soares Dos Santos Ribeiro, Fabio Henrique De Freitas, Juliana Brandão Pinto De Castro, Renato L. Alvarenga, Jeff Willardson

International Journal of Exercise Science

International Journal of Exercise Science 15(4): 498-506, 2022. Recent studies have observed that stretching applied to antagonist muscles can promote improvement in agonist muscle performance. The purpose of this study was to investigate the effect of different numbers of interset proprioceptive neuromuscular facilitation (PNF) stretching for the antagonists on the total number of repetitions completed for the agonists (quadriceps) in the leg extension exercise. Fourteen physically active individuals (age: 29.35 ± 10.5 years; body mass: 79.1 ± 11.34 kg; height: 170.4 ± 8.7 cm) participated in this study. The following experimental protocols were performed: 1) Traditional protocol (Traditional) …

Pre-Exhaustion Training, A Narrative Review Of The Acute Responses And Chronic Adaptations, Thiago Trindade, Ragami Alves, Bruno De Castro, Matheus De Medeiros, Jason De Medeiros, Paulo Dantas, Jonato Prestes

International Journal of Exercise Science

International Journal of Exercise Science 15(3): 507-525, 2022. Pre-exhaustion (PE) is a popular resistance training strategy that involves performing a single-joint exercise followed by a multi-joint exercise with minimal recovery between the transition. This approach is widely used by bodybuilding athletes and resistance training (RT) enthusiasts with the aim of enhancing muscle strength and hypertrophy. The present paper aimed to provide a narrative review as to the effects of the PE method on different acute and chronic outcomes, and discuss relevant practical applications. When considering the body of literature as a whole, we conclude that current evidence does not support …

Electromyographic Examination Of Hip And Knee Extension Hex Bar Exercises Varied By Starting Knee And Torso Angles, Edward Jo, Kevin A. Valenzuela, Whitney Leyva, Jennifer Rivera, Kalin Tomlinson, Elisabeth Zetiz

International Journal of Exercise Science

International Journal of Exercise Science 15(1): 541-551, 2022. Variations of the deadlift can be executed using the hexagonal (hex) bar by altering, for instance, the knee and torso angles while maintaining a constant hip angle at the start position. PURPOSE: To examine muscle activation patterns of the biceps femoris, rectus femoris, and erector spinae during three deadlift variations using the hex bar. METHODS: Twenty resistance-trained male and female subjects performed hex bar deadlift variations in three different starting knee flexion positions: 128.4 ± 8.5°, 111.9 ± 8.7°, and 98.3 ± 6.5°. Subjects performed three repetitions at 75% of their three-repetition …

Case 71: Lactate Dehydrogenase As A Therapeutic Target To Treat Parasitic Disease, Dr. Kathleen Cornely

Chemistry & Biochemistry Case Studies

In this case study, researchers use their knowledge of lactate dehydrogenase in parasites and humans to investigate inhibitors that are selective for the parasite agent.

Comparative Toxicity Of Hydrocarbons For Evaluation Of Lysmata Boggessi As An Experimental Proxy For Deep-Water Column Micronekton, Dorothy-Ellen A. Renegar, Nicholas Turner, Gopal Bera, Eileen G. Whitemiller, Bernhard Riegl, Jose Sericano, Anthony H. Knap

Marine & Environmental Sciences Faculty Articles

The potential impacts of sub-surface hydrocarbon plumes to deep-water column micronekton are an important consideration in a more complete understanding of ecosystem effects resulting from deep-sea oil spills. However, evaluating toxicity in these organisms presents multiple challenges, and the use of a shallow-water proxy species allows comparison and validation of experimental results. This study thus examined the suitability of the peppermint shrimp, Lysmata boggessi, as an experimental proxy for ecologically important deep-sea zooplankton/micronekton in hydrocarbon toxicity assays. This crustacean species occurs in shallow coastal marine environments throughout the western Atlantic, Caribbean and Gulf of Mexico, is similar in …

Anti-Tumor Activity Of Cetuximab Plus Avelumab In Non-Small Cell Lung Cancer Patients Involves Innate Immunity Activation: Findings From The Cave-Lung Trial, Carminia Maria Della Corte, Morena Fasano, Vincenza Ciaramella, Flora Cimmino, Robert Cardnell, Carl M Gay, Kavya Ramkumar, Lixia Diao, Raimondo Di Liello, Giuseppe Viscardi, Vincenzo Famiglietti, Davide Ciardiello, Giulia Martini, Stefania Napolitano, Concetta Tuccillo, Teresa Troiani, Erika Martinelli, Jing Wang, Lauren Byers, Floriana Morgillo, Fortunato Ciardiello

Faculty, Staff and Student Publications

BACKGROUND: We recently conducted Cetuximab-AVElumab-Lung (CAVE-Lung), a proof-of-concept, translational and clinical trial, to evaluate the combination of two IgG1 monoclonal antibodies (mAb): avelumab, an anti-PD-L1 drug, and cetuximab, an anti-epidermal growth factor receptor (EGFR) drug, as second- or third-line treatment in non-small cell lung cancer (NSCLC) patients. We have reported clinically relevant anti-tumor activity in 6/16 patients. Clinical benefit was accompanied by Natural Killer (NK) cell-mediated antibody-dependent cell cytotoxicity (ADCC). Among the 6 responding patients, 3 had progressed after initial response to a previous treatment with single agent anti-PD-1, nivolumab or pembrolizumab.

METHODS: We report long-term clinical follow-up and additional …

Human Adaptation And Morphological Variation: Expanding Diversity In Anatomy Curriculum, Jordan Cass, Cooker Storm

Seaver College Research And Scholarly Achievement Symposium

Introduction: The recent upturn in our nation’s socio-political conversation has fueled interest in ensuring that college curricula is diverse and inclusive. Because human anatomy is ubiquitous across colleges, it may be a valuable avenue to purposefully incorporate topics of diversity in a way that positively impacts our socio-cultural relationships. Providing students with a scientific understanding of our visible differences may mitigate subconscious bias when we see others who have different features. Purpose: We investigated the biogeographical factors that contribute to the morphological variability of the face, hair, and body size; with the secondary aim of developing diverse and …

Developmental Staging And Morphological Comparisons Of Four Fern Gametophyte Species From The Santa Monica Mountains, Tristan Furlong

Seaver College Research And Scholarly Achievement Symposium

The fern life cycle alternates between two distinct phases: a diploid sporophyte phase consisting of the “adult” fern, and a haploid gametophyte phase. Early events and changes in gametophyte development can have considerable consequences in the morphologies of these different fern species and may facilitate the various adaptive strategies employed by the gametophytes in their different habitats. This study investigates early developmental events in the gametophytes of four different fern species found in the Santa Monica Mountains, Adiantum jordanii (chaparral understory, summer deciduous sporophyte), Woodwardia fimbriata (riparian stream), Dryopteris arguta (chaparral understory, evergreen), and Pentagramma triangularis (chaparral understory, resurrection sporophyte). …

Substrate Type Affects The Drying Speed And Desiccation Tolerance Of Fern Gametophytes, Jordyn D. Regier, Mayra J. Hernandez, Camille K. Sicangco, Stephen D. Davis, Helen I. Holmlund

Seaver College Research And Scholarly Achievement Symposium

Although most ferns require abundant water to thrive, some ferns can survive in habitats with limited water. Previous studies have examined the adaptations that allow xeric ferns to thrive in mediterranean-type ecosystems such as southern California. However, the large fern sporophyte only represents one stage of the fern life cycle; the independent gametophyte phase must also survive water stress, including the six-month summer drought periods of the Santa Monica Mountains. Some fern gametophytes have been reported to be desiccation tolerant (capable of recovery from near-complete drying), and this trait is believed to be dependent on the plant’s drying speed. In …

Endogenous Cftr Expression In Human Epithelial Cell Lines, Zithlaly Amezquita

Undergraduate Research Conference

CFTR (Cystic Fibrosis Transmembrane-conductance Regulator) is a plasma membrane protein that functions as a chloride ion channel on many epithelial cells. There are over 1000 mutations that affect the function of this protein; however, the most common mutation is DF508. CFTR mutations target many secretory organs like pancreas and lungs causing the genetic disease cystic fibrosis (CF), common among Caucasians of northern European origin. Detection of endogenous CFTR expression is possible by a difficult and costly immunoprecipitation method but not by the most used western blotting method. Therefore, the goal of this project was to detect the endogenous CFTR expression …

Absence Of Streptococcus Pneumoniae Capsule Increases Bacterial Binding, Perisstence, And Inflammation In Corneal Infection, Mary A. Carr, Dennis Marcelo, K. Michael Lovell, Angela H. Benton, Nathan A. Tullos, Erin W. Norcross, Brandon Myers, Hayley Craddieth, Mary E. Marquart

Student Publications

The role of the pneumococcal polysaccharide capsule is largely unclear for Streptococcus pneumoniae keratitis, an ocular inflammatory disease that develops as a result of bacterial infection of the cornea. In this study, capsule-deficient strains were compared to isogenic parent strains in their ability to adhere to human corneal epithelial cells. One isogenic pair was further used in topical ocular infection of mice to assess the contribution of the capsule to keratitis. The results showed that non-encapsulated pneumococci were significantly more adherent to cells, persisted in significantly higher numbers on mouse corneas in vivo, and caused significant increases in murine ocular …

Nitrogen Increases Early-Stage And Slows Late-Stage Decomposition Across Diverse Grasslands, Allison L. Gill, Peter B. Adler, Elizabeth T. Borer, Christopher R. Buyarski, Elsa E. Cleland, Carla M. D'Antonio, Kendi F. Davies, Daniel S. Gruner, W. Stanley Harpole, Kirsten S. Hofmockel, Andrew S. Macdougall, Rebecca L. Mcculley, Brett A. Melbourne, Joslin L. Moore, John W. Morgan, Anita C. Risch, Martin Schütz, Eric W. Seabloom, Justin P. Wright, Louie H. Yang, Sarah E. Hobbie

Wildland Resources Faculty Publications

1. To evaluate how increased anthropogenic nutrient inputs alter carbon cycling in grasslands, we conducted a litter decomposition study across 20 temperate grasslands on three continents within the Nutrient Network, a globally distributed nutrient enrichment experiment
2. We determined the effects of addition of experimental nitrogen (N), phosphorus (P) and potassium plus micronutrient (K_μ) on decomposition of a common tree leaf litter in a long-term study (maximum of 7 years; exact deployment period varied across sites). The use of higher order decomposition models allowed us to distinguish between the effects of nutrients on early- versus late-stage decomposition.
3. Across continents, the …

Plant-Soil Feedbacks Help Explain Plant Community Productivity, Andrew Kulmatiski, Jeanette Norton, Leslie E. Forero, Josephine Grenzer

Browse all Datasets

Plant community productivity tends to increase as species richness increases, but the mechanisms behind this biodiversity-productivity relationship are not fully understood. Plant-soil feedbacks (PSF) are a compelling potential mechanism of the biodiversity-productivity relationship because they can explain patterns of both underyielding and overyielding in diverse plant communities. To test the role of plant-soil feedbacks in the biodiversity-productivity relationship we measured all possible plant-soil feedbacks for sixteen species, and used the measured plant-soil feedbacks to predict plant community biomass production. We compared the predicted plant community biomass production to observed biomass production in a paired biodiversity-productivity experiment.

Size Structure And Intraguild Interactions Between Two Ambystoma Species, Gwyneth Daunton

Theses and Dissertations

Intraguild interactions affect population and community structure through a combination of competition and predation. Changes in size structure influence intraguild interactions by affecting the strength and direction of these species’ interactions. I tested for size-structured intraguild interactions in temporary pond ecosystems between marbled salamanders (Ambystoma opacum) and tiger salamanders (Ambystoma tigrinum) using an outdoor mesocosm experiment. I hypothesized that 1) A. opacum survivorship and growth would be negatively impacted when both species start at a similar size because tiger salamanders grow faster and are more aggressive 2) A. tigrinum will grow slower and have lower survivorship …

The Design, Construction, And Testing Of A Recombinant Dna Vaccine For Brucella Abortus And Brucella Melitensis, Stephanie Lynn Korle

LSU Doctoral Dissertations

Brucella spp. are a bacterium that cause brucellosis, a zoonotic disease, which is commonly seen in cattle, sheep, goats, swine, and canines. Brucellosis is a problem worldwide, although it is eradicated in some countries (Garin-Bastuji et al. 1998). The reason for designing recombinant DNA (rDNA) vaccines opposed to utilizing the live-attenuated vaccines on the market is that they cannot be given to pregnant animals without potentially causing abortion, while an rDNA vaccine should be safe for pregnant animals since it does not contain viable bacteria. Also, there are no serological tests that can accurately distinguish between an animal vaccinated …

Analyzing Inhibitors Of The Sars-Cov-2 Endoribonuclease Nsp15, Mary Staunton

Honors Scholar Theses

The global pandemic caused by the virus SARS-CoV-2 has devastated the world. A flurry of research into the structures and activities of the virus have identified several viable targets for drug therapy, including the endoribonuclease nsp15, also known as EndoU. EndoU has been shown to play a role in diminishing the host cell’s immune response to the virus by cleaving signaling dsRNA, specifically targeting uridine sequences. The development of the crystal structure nsp15 allowed our lab along with others to perform virtual screenings to identify inhibitors that might be able to dock at the active site and inhibit the activity …

Transcriptomic Analysis Of Liver Indicates Novel Vaccine To Porcine Reproductive And Respiratory Virus Promotes Homeostasis In T-Cell And Inflammatory Immune Responses Compared To A Commercial Vaccine In Pigs, Damarius S. Fleming, Laura C. Miller, Jiuyi Li, Albert Van Geelen, Yongming Sang

Agricultural and Environmental Sciences Faculty Research

One of the largest impediments for commercial swine production is the presence of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV), a devastating RNA viral infection that is responsible for over $1 billion in loss in the U.S. annually. The challenge with combating PRRSV is a combination of the effect of an extraordinary rate of mutation, the ability to infect macrophages, and subversion of host immune response through a series of actions leading to both immunomodulation and immune evasion. Currently there are a handful of commercial vaccines on the market that have been shown to be effective against homologous infections, but …

Comparison Of Recent Survey Techniques For Estimating Benthic Cover On Caribbean Mesophotic Reefs, Joseph R. Pawlik, Roy A. Armstrong, Stephanie Farrington, John Reed, Sara Rivero-Calle, Hanumant Singh, Brian K. Walker, Jason White

Marine & Environmental Sciences Faculty Articles

Highly divergent estimates of benthic cover of sponges have been reported for Caribbean mesophotic reefs (90-100 m) based on quadrat point-intercept data collection using 2 methods: visual surveys conducted in situ by technical divers, and analyses of photographs taken by unmanned underwater vehicles (UUVs). The second method has been criticized for potential errors from image distortion caused by variable camera angle relative to the substratum, but without a broader comparison of both methods. We find that studies that have used the UUV-based method are advantageous for a number of reasons, most importantly: (1) access to the full mesophotic zone, (2) …

Southeast Asia Must Narrow Down The Yield Gap To Continue To Be A Major Rice Bowl, Shen Yuan, Alexander M. Stuart, Alice G. Laborte, Juan I. Rattalino Edreira, Achim Dobermann, Le Vu Ngoc Kien, Lưu Thị Thúy, Kritkamol Paothong, Prachya Traesang, Khin Myo Tint, Su Su San, Marcelino Q. Villafuerte Ii, Emma D. Quicho, Anny Ruth P. Pame, Rathmuny Then, Rica Joy Flor, Neak Thon, Fahmuddin Agus, Nurwulan Agustiani, Nanyan Deng, Tao Li, Patricio Grassini

Department of Agronomy and Horticulture: Faculty Publications

Southeast Asia is a major rice-producing region with a high level of internal consumption and accounting for 40% of global rice exports. Limited land resources, climate change and yield stagnation during recent years have once again raised concerns about the capacity of the region to remain as a large net exporter. Here we use a modelling approach to map rice yield gaps and assess production potential and net exports by 2040. We find that the average yield gap represents 48% of the yield potential estimate for the region, but there are substantial differences among countries. Exploitable yield gaps are relatively …

Using Quantitative Imaging For Personalized Medicine In Pancreatic Cancer: A Review Of Radiomics And Deep Learning Applications, Kiersten Preuss, Nate Thach, Xiaoying Liang, Michael Baine, Justin Chen, Chi Zhang, Huijing Du, Hongfeng Yu, Chi Lin, Michael A. Hollingsworth, Dandan Zheng

School of Biological Sciences: Faculty Publications

As the most lethal major cancer, pancreatic cancer is a global healthcare challenge. Personalized medicine utilizing cutting-edge multi-omics data holds potential for major breakthroughs in tackling this critical problem. Radiomics and deep learning, two trendy quantitative imaging methods that take advantage of data science and modern medical imaging, have shown increasing promise in advancing the precision management of pancreatic cancer via diagnosing of precursor diseases, early detection, accurate diagnosis, and treatment personalization and optimization. Radiomics employs manually-crafted features, while deep learning applies computer-generated automatic features. These two methods aim to mine hidden information in medical images that is missed by …

An Objective System For Quantitative Assessment Of Television Viewing Among Children (Family Level Assessment Of Screen Use In The Home-Television): System Development Study, Anil Kumar Vadathya, Salma Musaad, Alicia Beltran, Oriana Perez, Leo Meister, Tom Baranowski, Sheryl O Hughes, Jason A Mendoza, Ashutosh Sabharwal, Ashok Veeraraghavan, Teresia O'Connor

Children’s Nutrition Research Center Staff Publications

Background: Television viewing among children is associated with developmental and health outcomes, yet measurement techniques for television viewing are prone to errors, biases, or both.

Objective: This study aims to develop a system to objectively and passively measure children's television viewing time.

Methods: The Family Level Assessment of Screen Use in the Home-Television (FLASH-TV) system includes three sequential algorithms applied to video data collected in front of a television screen: face detection, face verification, and gaze estimation. A total of 21 families of diverse race and ethnicity were enrolled in 1 of 4 design studies to train the algorithms and …

Estimating Effects Of Radiation Frost On Wheat Using A Field-Based Frost Control Treatment To Stop Freezing Damage, Brenton A. Leske, Ben Biddulph

Grain and Other Field Crops Research Articles

Crop phenotyping experiments have long struggled to have a reliable control treatment that excludes frost and associated freezing damage to plants. Previous attempts used a barrier, such as a removable shelter or cloth to exclude frost. However, these methods were labour intensive and varied in their effectiveness. An automated diesel heater was used to protect field plots of wheat (Triticum aestivum L.) from frost damage. In 2018 and 2019 there were 22 and 33 radiation frost events from July to October at the field site. The heater maintained canopy air temperature above freezing (>0 °C) for the duration of …

Microbiological Contamination Associated With The Proximity Of A Refuse Dumpsite To A River Situated In Okada, Edo State, Nigeria, Ebere J. Okafor-Elenwo, Odaro S. Imade, Osazee E. Izevbuwa

Journal of Bioresource Management

This study was performed to evaluate the potential contamination of the Okponha river situated near a dumpsite in Okada, Edo State, Nigeria. Water samples were collected and analyzed for bacteriological and parasitological quality using standard procedures. Isolation and enumeration of bacterial colonies were performed by pour plate technique and the isolated bacteria were identified by standard phenotypic tests. Helminths and protozoa were screened by the direct smear technique. The values of HPC (3.79 ± 0.12 log₁₀ CFU/ml) and TCC (2.20 ± 0.14 log₁₀ CFU/ml) obtained from the river water samples exceeded WHO and NAFDAC recommended limits (≤ 2 …

Amelioration Of Cr (Vi) Into Cr (Iii) By Some Heavy Metal Resistant Bacterial Strains Isolated From Naran Valley, Ifrah Fayyaz, Asma Kalsoom, Rida Batool

Journal of Bioresource Management

Total thirty-two strains were isolated from both water and soil samples collected from Naran Valley which is surrounded by the rugged mountains, located in the province of Khyber Pakhtunkhwa, Pakistan. Streak plate method was used to screen the bacterial strains for resistance against selected heavy metals like chromium (Cr), cobalt (Co), copper (Cu), nickel (Ni) and zinc (Zn). Resistance against multiple heavy metals was shown by all the strains, but S15 and W15 were significant as they exhibited a maximum resistance to chromium and copper (1200 µg/ml). These strains also presented multiple antibiotic (ampicillin, tetracycline, chloramphenicol, and erythromycin) resistance patterns. …

Statistical Modeling Of Drug Properties, Host Clinical And Genetic Factors In Drug-Induced Liver Injury, Kristin Ashby

Theses and Dissertations

Drug-induced liver injury (DILI) is a rare adverse reaction that can result in liver transplant or death. Currently, there are no reliable methods to identify which individuals are at risk of developing severe or chronic DILI prior to drug administration. Here, we investigated the interplay between drug properties, clinical, and genetic factors and DILI risk, severity, and trajectory. First, we used a large, published dataset of 1036 drugs to examine the relationship between DILI risk and two drug properties, lipophilicity and extent of metabolism. Each drug property was tested alone and in combination with daily dose using five different DILI …

Stepping-Stones And Mediators Of Pandemic Expansion: A Context For Humans As Ecological Super-Spreaders, Eric P. Hoberg, Walter A. Boeger, Daniel R. Brooks, Valeria Trivellone, Salvatore J. Agosta

MANTER: Journal of Parasite Biodiversity

Humans represent ecological super-spreaders in the dissemination and introduction of pathogens. These processes, consistent with the dynamics of the Stockholm paradigm, are exemplified in the origin and globalized distributions of SARS-CoV-2 since initial recognition in central Asia during 2019 and 2020. SARS-like viruses are not widespread in mammals but appear widespread in chiropterans. Bats are isolated ecologically from most other assemblages of mammals in terrestrial systems. Humans may be the stepping-stone hosts for broad global dissemination and wider infection (given the opportunity) among diverse assemblages of mammals in which host and viral capacity are compatible. Human globalization mediated insertion in …

Do 2h And 18o In Leaf Water Reflect Environmental Drivers Differently?, Lucas A. Cernusak, Adrià Barbeta, Rosemary T. Bush, Rebekka Eichstaedt Bögelein, Juan Pedro Ferrio, Lawrence B. Flanagan, Arthur Gessler, Paula Martín-Gómez, Regina T. Hirl, Ansgar Kahmen, Claudia Keitel, Chun-Ta Lai, Niels C. Munksgaard, Daniel B. Nelson, Jérôme Ogée, John S. Roden, Hans Schnyder, Steve L. Voelker, Lixin Wang, Hilary Stuart-Williams, Lisa Wingate, Wusheng Yu, Liangju Zhao, Matthias Cuntz

Michigan Tech Publications, Part 1

We compiled hydrogen and oxygen stable isotope compositions (δ H and δ O) of leaf water from multiple biomes to examine variations with environmental drivers. Leaf water δ H was more closely correlated with δ H of xylem water or atmospheric vapour, whereas leaf water δ O was more closely correlated with air relative humidity. This resulted from the larger proportional range for δ H of meteoric waters relative to the extent of leaf water evaporative enrichment compared with δ O. We next expressed leaf water as isotopic enrichment above xylem water (Δ H and Δ O) to remove the …