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2014

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Articles 7531 - 7560 of 7603

Full-Text Articles in Life Sciences

Health Promotion In Multiple Domains: Capitalizing On The Spillover Effect, Gabrielle Maria D'Lima Jan 2014

Health Promotion In Multiple Domains: Capitalizing On The Spillover Effect, Gabrielle Maria D'Lima

Psychology Theses & Dissertations

Lifestyle behaviors, such as physical activity and food consumption choices, play a critical role in the development of chronic diseases and ultimately mortality. Optimally, multiple health-related behaviors are changed to reduce risk rather than targeting only one risk behavior. The purpose of the current research was to examine the potential utility of the spillover effect in the application of a multiple health behavior intervention. The online intervention developed in this study aimed primarily to foster self-regulation, bolstered by impulsivity control and self-efficacy, in one health-related behavior (i.e., physical activity) in order to potentially affect change in other health-related behaviors (e.g., …

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Developing A Caenorhabditis Elegans Model For Marfan Syndrome, Pauline Fotopoulos Jan 2014

Developing A Caenorhabditis Elegans Model For Marfan Syndrome, Pauline Fotopoulos

Theses and Dissertations

Marfan Syndrome (MFS) is one of the most common monogenic diseases and affects approximately 1 in 5,000 individuals worldwide. The syndrome is characterized by elongated extremities, tall stature, slender frame, and cardiac, and vision abnormalities due to severe connective tissue defects. It is caused by mutations in the fbn1 gene, which encodes an extracellular matrix glycoprotein, and is required for proper cardiac and skeletal development and for sequestration of TGFβ (transforming growth factor beta) and BMP (bone morphogenetic protein) within the extracellular matrix (ECM). The primary objective of this study was to establish a C.elegans MFS model and use this …

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Voltage Sensing Mechanism In The Voltage-Gated And Proton (H+)-Selective Ion Channel Hv1, Aaron L. Randolph Jan 2014

Voltage Sensing Mechanism In The Voltage-Gated And Proton (H+)-Selective Ion Channel Hv1, Aaron L. Randolph

Theses and Dissertations

Activation of the intrinsic aqueous water-wire proton conductance (GAQ) in Hv1 channels is controlled by changes in membrane potential and the transmembrane pH gradient (ΔpH). The mechanism by which changes in ΔpH affect the apparent voltage dependence of GAQ activation is not understood. In order to measure voltage sensor (VS) activation in Hv1, we mutated a conserved Arg residue in the fourth helical segment (S4) to His and measured H+ currents under whole-cell voltage clamp in transfected HEK-293 cells. Consistent with previous studies in VS domain containing proteins, we find that Hv1 R205H mediates a robust resting-state H+ ‘shuttle’ conductance …

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The Group Iva Cytosolic Phospholipase A2/C1p Interaction And Its Role In Eicosanoid Synthesis And Inflammation, Jennifer A. Mietla Jan 2014

The Group Iva Cytosolic Phospholipase A2/C1p Interaction And Its Role In Eicosanoid Synthesis And Inflammation, Jennifer A. Mietla

Theses and Dissertations

In the presented study, we demonstrate that the interaction of group IVA cytosolic phospholipase A2 and ceramide-1-phosphate is crucial for production of eicosanoid synthesis in inflammation. Inflammation is a critical component of many disease states including anaphylaxis, cancer, cardiovascular disease, rheumatoid arthritis, diabetes and asthma. Eicosanoids are well established mediators of inflammation, and the initial rate limiting step in the production of eicosanoids is the liberation of arachidonic acid (AA) from membrane phospholipids by a phospholipase A2 (PLA2). The major phospholipase involved in this liberation of AA during the inflammatory response is group IVA cytosolic phospholipase A2 (cPLA2α). Previous studies …

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Developing C. Elegans As A Model To Study Type 2 Diabetes Mellitus, Jheesoo Ahn Jan 2014

Developing C. Elegans As A Model To Study Type 2 Diabetes Mellitus, Jheesoo Ahn

Theses and Dissertations

Caenorhabditis elegans has been studied as a model organism in various areas of biomedical research because it shares many conserved functions at molecular and genetic levels with humans. Specifically, it is an ideal organism to study heterogeneous metabolic syndromes such as Type 2 Diabetes Mellitus (T2DM) as C. elegans can be used to delineate molecular pathways that are at the core of its problems. A growing number of populations worldwide are faced with chronic T2DM, which also manifests several complications, such as blindness, neuropathy and cardiovascular diseases. Currently, metformin is the first-line drug of choice administered to treat T2DM. While …

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The Effects Of Sampling Design On Abundance And Distribution Of Bottlenose Dolphins In The St. Johns River, Florida, Samantha Ryanne Nekolny Jan 2014

The Effects Of Sampling Design On Abundance And Distribution Of Bottlenose Dolphins In The St. Johns River, Florida, Samantha Ryanne Nekolny

UNF Graduate Theses and Dissertations

The National Oceanic and Atmospheric Administration (NOAA) is tasked with upholding the regulations prescribed in the Marine Mammal Protection Act of 1972. One of the ways this is accomplished is by producing regular stock assessment reports. For these reports, knowledge about a species abundance and distribution is a vital component, allowing informed management decisions to be made that may potentially reduce the natural and anthropogenic impacts on the organisms. In 2010, an Unusual Mortality Event (UME) occurred in the lower St. Johns River, resulting in an unusually large number of bottlenose dolphin strandings. As the data regarding this population was …

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Reproductive Biology Of The Bonnethead (Sphyrna Tiburo) From The Southeastern U.S. Atlantic Coast, Melissa I. Gonzalez De Acevedo Jan 2014

Reproductive Biology Of The Bonnethead (Sphyrna Tiburo) From The Southeastern U.S. Atlantic Coast, Melissa I. Gonzalez De Acevedo

UNF Graduate Theses and Dissertations

Understanding the life history of marine wildlife is essential for the management of both commercial and recreational fisheries. Bonnetheads (Sphyrna tiburo) are a component of the small coastal shark (SCS) fishery complex, and are caught regularly in both types of fisheries. Despite being well studied in the Gulf of Mexico, little is known about bonnetheads from the U.S. Atlantic coast. The goal of the first component of this study was to provide new, key information on their life history to improve management of U.S. Atlantic populations, particularly by identifying reproductive seasonality, periodicity and fecundity. This was accomplished by examining sexually …

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Development Of Leaf Shape And Vein Homologies In Five Species Of The Genus Ipomoea (Convolvulaceae), Austin William Jones Jan 2014

Development Of Leaf Shape And Vein Homologies In Five Species Of The Genus Ipomoea (Convolvulaceae), Austin William Jones

Dissertations and Theses @ UNI

Angiosperm leaves are extremely variable in form while predominantly maintaining the function of the primary photosynthetic organ of the plant. Changes in leaf form can result from myriad physiological processes which may be influenced by ecology, physical stimuli, phylogeny, or other factors. In studying the development of divergent leaf forms among closely related species, conserved morphological elements may be identified that are not apparent in the mature form. The genus Ipomoea (Convolvulaceae) contains over 600 species and a wide range in leaf shapes. Five species, I. purpurea, I. coccinea, I. sloteri, I. quamoclit, and I. cairica show a range in …

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Tracking Above- And Below- Ground Seed Persistence And Mortality In A Native Tallgrass Prairie Restoration, Carmen Pellish Jan 2014

Tracking Above- And Below- Ground Seed Persistence And Mortality In A Native Tallgrass Prairie Restoration, Carmen Pellish

Dissertations and Theses @ UNI

The large cost of seed and low seedling establishment rates make restoring native tallgrass prairies expensive and difficult. Tallgrass prairie restorations typically achieve seedling emergence rates of only 10%. This begs the question of what happens to the remaining 90% of seeds that do not emerge as seedlings. This thesis sought to assess or quantify the importance of seed predators and death by microorganisms or to senescence on seed survival and seedling establishment within a newly planted native tallgrass prairie restoration under typical restoration conditions. I hypothesized that small vertebrate seed predators would play be detrimental to overall seedling emergence …

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Geometric Morphometric Analysis Of Skeletal Shape Variation Across The Pleuronectiformes, Corinthia R. Black Jan 2014

Geometric Morphometric Analysis Of Skeletal Shape Variation Across The Pleuronectiformes, Corinthia R. Black

Dissertations and Theses @ UNI

Pleuronectiformes, commonly called flatfishes, is a large order of highly specialized fishes that display two eyes on one side of the head. Comprised of approximately 716 species, flatfishes share many similar characteristics. However, the complex history of the classification of the group reveals the diversity of shape across the order. This study focused on the diversity of shape across the order by examining skeletal elements. Landmark-based geometric morphometrics was used to visualize shape variation across the order of Pleuronectiformes. A total of 457 specimens were radiographed from collections at the University of Kansas Natural History Museum and the Smithsonian National …

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Russian Olive Control - Cut Stump Treatment, Ron Patterson, Dennis Worwood Jan 2014

Russian Olive Control - Cut Stump Treatment, Ron Patterson, Dennis Worwood

All Current Publications

This fact sheet discusses cut stump herbicide treatment, which can be used to control Russian olive at any time of the year.

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Grain Finishing Beef: Alternative Rations, Cattle Performance And Feeding Costs For Small Feeders, Dillon M. Feuz, Jesse Russell Jan 2014

Grain Finishing Beef: Alternative Rations, Cattle Performance And Feeding Costs For Small Feeders, Dillon M. Feuz, Jesse Russell

All Current Publications

In a feeding trial at Utah State University during the summer of 2013, it was found that cattle had higher ADG when fed SFC compared to whole corn. However, when the relative cost of SFC and whole corn were considered, feeding whole corn compared to SFC resulted in nearly identical feed costs per pound of gain. Actual and relative costs of SFC and whole corn can and do vary over time and across geographic regions. Therefore, feeders could use the information in this fact sheet to determine which feed will be the most economical for them.

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Nurturing Native Plants, A Guide To Vegetative Propagation Of Native Woody Plants In Utah, Larry Rupp, Adrea Wheaton Jan 2014

Nurturing Native Plants, A Guide To Vegetative Propagation Of Native Woody Plants In Utah, Larry Rupp, Adrea Wheaton

All Current Publications

The goal of this publication was to collect propagation protocols from research literature and compile successful methods used for each native species listed. Where information was unavailable for a species, we have listed the only propagation alternatives. The propagation protocols are laid out much like a recipe would be, listing the various ingredients and materials required for each ‘dish’. This ‘cookbook’ is a work-in-progress. If you find you have additions to suggest, please email: [email protected].

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Demonstrating Advancements In Biotechnology To Ranchers In Southern Utah: Genetic Testing, Kevin Heaton, Katelyn Peterson Jan 2014

Demonstrating Advancements In Biotechnology To Ranchers In Southern Utah: Genetic Testing, Kevin Heaton, Katelyn Peterson

All Current Publications

This fact sheet describes genetic testing for beef cattle to identify which animals in a herd are the most productive or least productive and make some culling decisions based on the results of the tests.

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Basic Selection, Nutrition And Care Of Show Poultry, Troy D. Cooper, Darrell Rothlisberger, David D. Frame Jan 2014

Basic Selection, Nutrition And Care Of Show Poultry, Troy D. Cooper, Darrell Rothlisberger, David D. Frame

All Current Publications

This fact sheet provides tips on selecting chickens for shows, and how to feed and care for show poultry.

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Effect Of Feed Additives On Amino Acid And Dipeptide Transport By Intestines Of American Lobster And Atlantic White Shrimp, Maria Louise Peterson Jan 2014

Effect Of Feed Additives On Amino Acid And Dipeptide Transport By Intestines Of American Lobster And Atlantic White Shrimp, Maria Louise Peterson

UNF Graduate Theses and Dissertations

Previous nutritional physiology research using L-histidine and zinc in American lobster intestine (Homarus americanus) has suggested that these solutes can be co-transported as complexes (Histidine-Zinc-Histidine) across the intestine using a peptide transporter. Furthermore, transport of L-leucine was shown to be inhibited by high calcium concentrations. Dipeptide and bis-complex transport and the role of calcium were investigated in the perfused intestines of lobster and Atlantic white shrimp (Litopenaeus setiferus). Following trans-intestinal transport, serosal medium was analyzed for amino acid composition by gas chromatography. In lobster, the transport of glycylsarcosine (Gly-Sar) from mucosa to serosa was stimulated two-fold …

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Functional Characterization Of A Putative Disaccharide Membrane Transporter In Crustacean Intestine, Rasheda S. Likely Jan 2014

Functional Characterization Of A Putative Disaccharide Membrane Transporter In Crustacean Intestine, Rasheda S. Likely

UNF Graduate Theses and Dissertations

The mechanisms of transepithelial absorption of dietary sucrose in the American lobster, Homarus americanus, were investigated in this study to determine whether sugars can be transported across an animal gut intact or as monosaccharides following hydrolysis. Lobster intestine was isolated and mounted in a perfusion chamber to characterize the mechanisms of mucosal to serosal (MS) 14C -sucrose transport across the intestine MS fluxes were measured by adding varying concentrations of 14C-sucrose to the perfusate which resulted in a hyperbolic curve following Michaelis-Menten kinetics. The kinetic constants of the proposed sucrose transporter were KM = 15.84 ± 1.81 …

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Effects Of Elevated Salinity And Oxidative Stress On The Physiology Of The Toxigenic Cyanobacterium Microcystis Aeruginosa, Billy Christopher Warhurst Jan 2014

Effects Of Elevated Salinity And Oxidative Stress On The Physiology Of The Toxigenic Cyanobacterium Microcystis Aeruginosa, Billy Christopher Warhurst

UNF Graduate Theses and Dissertations

Harmful algal blooms (HABs) are found worldwide, particularly in places where warm, well-lit, and stagnant waters are common. HABs can have negative effects on aquatic plants and wildlife due to the reduction in light availability associated with turbidity, decrease in O2 availability, and the production of secondary metabolites that can harm or even prove lethal. Aquatic ecosystems are regularly being affected by elevated salinity because of recent water management strategies, episodes of drought, and salt water intrusion. This research focused on how salinity levels ranging from 0-10ppt affected physiological attributes such as cellular growth and abundance, cell mortality, toxin …

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The Social Structure And Mating Strategies Of Bottlenose Dolphins (Tursiops Truncatus) In The St. Johns River, Jessica Lea Ermak Jan 2014

The Social Structure And Mating Strategies Of Bottlenose Dolphins (Tursiops Truncatus) In The St. Johns River, Jessica Lea Ermak

UNF Graduate Theses and Dissertations

Across populations, bottlenose dolphins (Tursiops sp.) exhibit a fission-fusion pattern of associations, in which group size and composition change fluidly throughout the day. Beneath this seemingly ephemeral social structure, considerable variation exists across study sites. While females typically have moderate bonds with one another within a large social network, male-male bonds are variable, though males typically take one of two strategies; some males encounter females individually for opportunities to breed while others cooperate within a first-order alliance to collectively herd females. In addition, multi-tiered alliances in which two first-order alliances cooperate to defend or assist in the theft of a …

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Kingswood Lake Management Plan, Sarah Martina Tierney Jan 2014

Kingswood Lake Management Plan, Sarah Martina Tierney

Honors Theses and Capstones

High water quality and natural buffers exist on Kingswood Lake located in Brookfield, New Hampshire. A comprehensive lakes inventory (CSI) was recorded and health of the land, wildlife, and waterways were observed. Educational outreach was taken to inform the local community and to instruct them on proper stewardship of the land. A completed watershed management plan was constructed including key recommendation of limiting nitrogen loading in the area, checking septic systems for leaching, stabilizing shoreline from erosion, and establishing man-made rain gardens to help preserve water quality. The Kingswood watershed management plan acts as a guide for the town of …

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Investigating The Interactions Between Cyanobacteria And Vibrio Parahaemolyticus, Caroline E. Ward Jan 2014

Investigating The Interactions Between Cyanobacteria And Vibrio Parahaemolyticus, Caroline E. Ward

Honors Theses and Capstones

One well-known pathogen that has been the topic of many recent studies is Vibrio parahaemolyticus, which causes thousands of foodborne illnesses a year, mostly from the ingestion of raw or undercooked oysters. It has been shown cyanobacteria can act as a long-term reservoir of Vibrio cholerae, another pathogenic Vibrio, by encasing the cells within mucilaginous sheaths during which Vibrios enter a viable but non-culturable state. In this study we investigated the interaction of V. parahaemolyticus with cyanobacteria to determine whether cyanobacteria aid in the longevity and survival of V. parahaemolyticus. We found that non-pathogenic V. parahaemolyticus …

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The Pleiotropic Effects Of Beneficial Mutations Of Adapted Escherichia Coli Populations, Brian Scott Van Dam Jan 2014

The Pleiotropic Effects Of Beneficial Mutations Of Adapted Escherichia Coli Populations, Brian Scott Van Dam

Honors Theses and Capstones

Mutations that improve fitness in one environment can often be beneficial, deleterious, or neutral in alternative environments. When a single mutation effects fitness in multiple environments, it is said to be a pleiotropic, which can have important consequences for niche specialization, niche expansion, speciation, and even extinction in the face of environmental change. While previous studies have revealed that pleiotropy is nearly universal, the role of adaptive history in the spectrum of pleiotropic effects has yet to undergo detailed experimental observation. Using experimental evolution we gathered beneficial mutations in a previously adapted strain of Escherichia coli growing in the same …

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The Distribution Of Fitness Effects Of Spontaneous Mutations In Vibrio Fischeri, Chelsea K. Jones Jan 2014

The Distribution Of Fitness Effects Of Spontaneous Mutations In Vibrio Fischeri, Chelsea K. Jones

Honors Theses and Capstones

Mutations are the ultimate source of the biological diversity on which natural selection acts, but the vast majority of these mutations are harmful. As such, mutations lead to disease states like cancer, extinction of small populations, and can drive pathogen evolution. Unfortunately, because mutations are rare and past studies have been subject to detection biases, very little is known about the distribution of fitness effects from naturally occurring mutations. In this study, we used mutation accumulation and full genome sequencing to capture naturally occurring mutations before they were exposed to the sieve of natural selection in Vibrio fischeri. We …

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Diel Vertical Migration Strategies Of Zooplankton In Oligotrophic Russell Pond, New Hampshire, Kelsey Ann Dobe Jan 2014

Diel Vertical Migration Strategies Of Zooplankton In Oligotrophic Russell Pond, New Hampshire, Kelsey Ann Dobe

Honors Theses and Capstones

Russell Pond is an ultra-oligotrophic lake with low chlorophyll a (1.9 mg L-1), total phosphorus (3.4 mg L-1), high Secchi Disk (10.4 m) and high light transmission (water coefficient of water, kw=0.33). Vertical migration of Chaoborus, Bosmina, Daphnia, and copepods were examined using net collections of zooplankton discrete depth counts and sonar. Three contrasting patterns of vertical migration were observed in Russell Pond. Chaoborus punctipennis larvae vertical migration began at 7 pm and migrated through the entire lake water column, a total of 23 m from the sediments to the surface water in …

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Insights From Project Feederwatch: Changes In The Abundance And Occurrence Of Birds In New Hampshire Over The Past 24 Years, Lee A. Sutcliffe Jan 2014

Insights From Project Feederwatch: Changes In The Abundance And Occurrence Of Birds In New Hampshire Over The Past 24 Years, Lee A. Sutcliffe

Honors Theses and Capstones

Changes in the climate and land use over time can lead to changes in the composition of wildlife communities. Using data from Project FeederWatch, we examine trends in the abundance and occurrence of birds documented in the winters from 1988 to 2012 in New Hampshire. Changes in abundance and occurrence are summarized for individual bird species as well as across species based on life history traits. In addition, we examined trends for the state as a whole as well as in subregions. We discuss these changes with regards to the variations of climate and land use that are occurring throughout …

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Effects Of Keratin Filaments On Erk Signaling During Fas-Induced Death Of Cervical Cancer (Hela) Cells, Amanda Berger Jan 2014

Effects Of Keratin Filaments On Erk Signaling During Fas-Induced Death Of Cervical Cancer (Hela) Cells, Amanda Berger

Honors Theses and Capstones

Survival of cancer cells is influenced by a variety of factors, including physical elements such as keratin filaments. We know HeLa cells containing or lacking keratin 8/18 intermediate filaments (K+ and K- cells, respectively) are more sensitive to the death-inducing effects of Fas agonist compared to the cytokines tumor necrosis factor alpha (TNF-α) or TNF-related apoptosis-inducing ligand. Additionally, K- cells are more sensitive to Fas-induced death than K+ as shown by previous studies using mitochondrial activity and caspase activation assays. In the current study we tested the hypothesis that keratin filaments associate with the mitogen activated protein kinase (MAPK) cascade …

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Do Flame Retardants Promote Vitamin D Deficiency?, Audrey Petteruti Jan 2014

Do Flame Retardants Promote Vitamin D Deficiency?, Audrey Petteruti

Honors Theses and Capstones

Vitamin D deficiency in the Unites States has become more prevalent in recent years. Research has shown that environmental chemicals such as flame-retardants induce hepatic enzymes in the cytochrome P450 family such as CYP24 and CYP3A that are important in vitamin D metabolism. To determine if exposure to one class of flame-retardants known as polybrominated diethyl ethers (PBDEs) promotes vitamin D deficiency, 15 rats consumed a diet marginally deficient in Vitamin D - 85 IU Vitamin D/kg diet - for 56 days. On day 28 of the experiment, 7 rats were gavaged daily with 7 mg/kg BW PBDEs and 8 …

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Drought Sensitivity Of Slash Pine And Longleaf Pine Deduced By Tree Ring Analysis, Conor Madison Jan 2014

Drought Sensitivity Of Slash Pine And Longleaf Pine Deduced By Tree Ring Analysis, Conor Madison

Honors Theses and Capstones

Annual tree rings give us the opportunity to investigate the adaptation of trees to climate and environmental changes over a long period of time. In particular, the physical characteristics of each ring (width and earlywood and late wood differentiation) can be used to reconstruct past environment conditions. Physiological responses of trees will be evaluated for two conifers species, i.e. Longleaf pine and Slash pine, giving the opportunity to compare the two species and understand how each species (Longleaf pine and Slash pine) adapt their water use to thrive in such extreme environments. Growth data will then be related to the …

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Effects Of Audible Human Disturbance On Koala (Phascolarctos Cinereus) Behavior In Queensland, Australia And Implications For Management, Galina Eugenia Kinsella Jan 2014

Effects Of Audible Human Disturbance On Koala (Phascolarctos Cinereus) Behavior In Queensland, Australia And Implications For Management, Galina Eugenia Kinsella

Honors Theses and Capstones

As the growing human population continues to encroach on wildlife habitat, species are forced to adapt in order to survive. In addition to causing habitat loss, human presence can create more subtle disturbances, such as noise pollution, that disrupt wildlife behavior. Adapting to human presence is particularly difficult for species with specialized resource needs or low mobility. The koala (Phascolarctos cinereus), a national icon of Australia, meets both these criteria. Koalas were once abundant throughout Australia, but are now classified as “threatened.” Habitat loss is at least partly responsible for this decline, but anthropogenic noise may also be …

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How Do Various Maize Crop Models Vary In Their Responses To Climate Change Factors?, Simon Bassu, Nadine Brisson, Jean-Louis Durand, Kenneth J. Boote, Jon Lizaso, James Jones, Cynthia Rosenzweig, Alex Ruane, Myriam Adam, Christian Baron, Bruno Basso, Christian Biernath, Hendrick Boogaard, Sjaak Conijn, Marc Corbeels, Delphine Deryng, Giacomo De Sanctis, Sebastian Gayler, Patricio Grassini, Jerry Hatfield, Steven Hoek, Cesar Izaurralde, Raymond Jongschaap, Armen Kemanian, Christian Kersebaum, Soo-Hyung Kim, Naresh Kumar, David Makowski, Christoph Muller, Claas Nendel, Eckart Priesack, Maria Virinia Pravia, Federico Sau, Iurii Shcherbak, Fulu Tao, Edmar Teixeira, Dennis Timlin, Katharina Waha Jan 2014

How Do Various Maize Crop Models Vary In Their Responses To Climate Change Factors?, Simon Bassu, Nadine Brisson, Jean-Louis Durand, Kenneth J. Boote, Jon Lizaso, James Jones, Cynthia Rosenzweig, Alex Ruane, Myriam Adam, Christian Baron, Bruno Basso, Christian Biernath, Hendrick Boogaard, Sjaak Conijn, Marc Corbeels, Delphine Deryng, Giacomo De Sanctis, Sebastian Gayler, Patricio Grassini, Jerry Hatfield, Steven Hoek, Cesar Izaurralde, Raymond Jongschaap, Armen Kemanian, Christian Kersebaum, Soo-Hyung Kim, Naresh Kumar, David Makowski, Christoph Muller, Claas Nendel, Eckart Priesack, Maria Virinia Pravia, Federico Sau, Iurii Shcherbak, Fulu Tao, Edmar Teixeira, Dennis Timlin, Katharina Waha

Department of Agronomy and Horticulture: Faculty Publications

Potential consequences of climate change on crop production can be studied using mechanistic crop simulation models. While a broad variety of maize simulation models exist, it is not known whether different models diverge on grain yield responses to changes in climatic factors, or whether they agree in their general trends related to phenology, growth, and yield. With the goal of analyzing the sensitivity of simulated yields to changes in temperature and atmospheric carbon dioxide concentrations [CO2], we present the largest maize crop model intercomparison to date, including 23 different models. These models were evaluated for four locations representing a wide …

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