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2014

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Articles 7291 - 7320 of 7603

Full-Text Articles in Life Sciences

The Effects That Liquid And Solid Cattle Manure Have On The Water Quality Of Drainage Ditches In Putnam County, Ohio, Janelle Horstman Jan 2014

The Effects That Liquid And Solid Cattle Manure Have On The Water Quality Of Drainage Ditches In Putnam County, Ohio, Janelle Horstman

Honors Projects

Lake Erie has experienced harmful algal blooms with increased frequency since the mid-1990s due to excess nutrients from Rivers, such as the Maumee River, and largely agricultural watersheds. Nonpoint source pollution from agriculture contributes to eutrophication, algal blooms, and the degradation of water quality. This creates stress on aquatic fauna, reduced aesthetic quality, odor, and limits of the water for usage of drinking, recreation, and industry. This research paper asks what the contributions of having access to manure application records, soil records, and information about antibiotics have on what is known about manure management and antibiotic resistance, which has been …

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The Effects Of Anxiety On Sensory Gating, Jonathon Meier Jan 2014

The Effects Of Anxiety On Sensory Gating, Jonathon Meier

Honors Projects

Sensory gating is a proposed important physiological process of inhibiting neuronal responses of repetitious stimuli in the central nervous system to allocate more cognitive resources to additional salient information. Sensory gating is currently being studied to better understand psychiatric illnesses, especially those characterized by emotional changes and the inability to concentrate such as schizophrenia, ADHD, anxiety disorder, and Parkinson’s. Anxiety is a strong feeling of nervousness that occurs in all individuals at varying degrees and is associated with detrimental health effects as well as hindering concentration. Numerous brain regions are associated with anxiety levels such as the anterior limbic system, …

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Extent Of Bgsu Student Food Insecurity And Community Resource Use, Kathryn Koller Jan 2014

Extent Of Bgsu Student Food Insecurity And Community Resource Use, Kathryn Koller

Honors Projects

This research examines student food insecurity at Bowling Green State University (BGSU) and available resources in Bowling Green, Ohio. Seven classes from BGSU’s main campus were randomly chosen to complete a survey regarding participant background information, details concerning food attainment, food security level, and use of community resources to allow for food acquisition. These classes included undergraduate classes and ranged from 15 to 272 students per class. Less than one quarter of student participants had food insecurity (19%), and food insecurity was significantly associated with financial dependence (P=0.04). There was a significant relationship between not utilizing community food resources and …

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Structure-Functional Prediction And Analysis Of Cancer Mutation Effects In Protein Kinases, Anshuman Dixit, Gennady M. Verkhivker Jan 2014

Structure-Functional Prediction And Analysis Of Cancer Mutation Effects In Protein Kinases, Anshuman Dixit, Gennady M. Verkhivker

Mathematics, Physics, and Computer Science Faculty Articles and Research

A central goal of cancer research is to discover and characterize the functional effects of mutated genes that contribute to tumorigenesis. In this study, we provide a detailed structural classification and analysis of functional dynamics for members of protein kinase families that are known to harbor cancer mutations. We also present a systematic computational analysis that combines sequence and structure-based prediction models to characterize the effect of cancer mutations in protein kinases. We focus on the differential effects of activating point mutations that increase protein kinase activity and kinase-inactivating mutations that decrease activity. Mapping of cancer mutations onto the conformational …

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In The News, Robert J. Lewis, Joe N. Caudell Jan 2014

In The News, Robert J. Lewis, Joe N. Caudell

Human–Wildlife Interactions

No abstract provided.

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Identifying People’S Most Preferred Management Technique For Feral Cats In Hawaii, Cheryl A. Lohr, Christopher A. Lepczyk, Linda J. Cox Jan 2014

Identifying People’S Most Preferred Management Technique For Feral Cats In Hawaii, Cheryl A. Lohr, Christopher A. Lepczyk, Linda J. Cox

Human–Wildlife Interactions

Feral cats (Felis catus) are abundant in many parts of the world and pose a threat to native wildlife. Human–wildlife conflicts regarding how feral cats should be managed have increased recently. In Hawaii, previous research has revealed that most residents would like to see the feral cat abundance reduced, but opinions differ regarding which techniques are acceptable for achieving this. This paper describes an analytical hierarchy process that combines rankings of decision criteria by Hawaii’s residents with expert knowledge of the costs and benefits associated with 7 techniques (live-capture and adoption, live-capture and lethal injection, live-capture and lethal gunshot, trap-neuter-release …

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Morbidity And Mortality In Reptiles Presented To A Wildlife Care Facility In Central Illinois, Anne E. Rivas, Matthew C. Allender, Mark Mitchell, Julia K. Whittington Jan 2014

Morbidity And Mortality In Reptiles Presented To A Wildlife Care Facility In Central Illinois, Anne E. Rivas, Matthew C. Allender, Mark Mitchell, Julia K. Whittington

Human–Wildlife Interactions

We examined morbidity and mortality of 200 reptiles, representing 13 different species that were presented to the University of Illinois Wildlife Medical Clinic (WMC) from 2003 to 2010. Snapping turtles (Chelydra serpentine; n = 46), box turtles (Terrapene sp.; n = 43), painted turtles (Chrysemys picta; n = 37), and red-eared slider turtles (Trachemys scripta elegans; n = 33) were the most frequently seen species. Turtles were significantly more likely to be presented to the WMC following collision with a motor vehicle (n = 73) than any other reason, including idiopathic trauma (i.e., …

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Evaluation Of Eight Repellents In Deterring Eastern Cottontail Herbivory In Connecticut, Scott C. Williams, Michael R. Short Jan 2014

Evaluation Of Eight Repellents In Deterring Eastern Cottontail Herbivory In Connecticut, Scott C. Williams, Michael R. Short

Human–Wildlife Interactions

Herbivory by eastern cottontails (Sylvilagus floridanus) can be the source of significant agricultural, nursery, and managed landscape damage. Where cottontails cannot be managed by lethal means or where trap and release is infeasible, repellents may be a reasonable alternative. We tested 8 different repellent formulations (Bobbex Deer Repellent® Canadian formulation concentrate, Bobbex Deer Repellent® Canadian ready-to-use (RTU), Bobbex-R Animal Repellent® concentrate, Bonide Repels All® concentrate, Bonide Deer & Rabbit Repellent® concentrate, Liquid Fence® Deer & Rabbit Repellent concentrate, Plantskydd® soluble powder, and Rabbit Stopper® RTU) on Johnny jump-ups (Viola tricolor), lettuce (Lactuca sativa), and …

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In The News, Robert J. Lewis, Joe N. Caudell Jan 2014

In The News, Robert J. Lewis, Joe N. Caudell

Human–Wildlife Interactions

No abstract provided.

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A Spatially Explicit Model Of The White-Tailed Deer Population In Delaware, Brian Jennings, Jacob L. Bowman, Elizabeth L. Tymkiw Jan 2014

A Spatially Explicit Model Of The White-Tailed Deer Population In Delaware, Brian Jennings, Jacob L. Bowman, Elizabeth L. Tymkiw

Human–Wildlife Interactions

Population models of white-tailed deer (Odocoileus virginianus) are used by many states to predict population levels and aid in making management decisions. Delaware did not have a deer population model, so we developed one and used it to investigate the implications of changes to the harvest. We modeled 7 changes to the harvest regime and compared these changes to the base line of no changes to the harvest regime. We used survival rates, reproductive rates, harvest data, a population estimate, and spotlight counts to construct the model. The model scenario began in February 2006 and ran until August …

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Characteristics And Distribution Of Live-Stock Losses Caused By Wild Carnivores In Maasai Steppe Of Northern Tanzania, Batistino P. Mponzi, Christopher A. Lepczyk, Bernard M. Kissui Jan 2014

Characteristics And Distribution Of Live-Stock Losses Caused By Wild Carnivores In Maasai Steppe Of Northern Tanzania, Batistino P. Mponzi, Christopher A. Lepczyk, Bernard M. Kissui

Human–Wildlife Interactions

Agricultural development accelerates the loss of habitat for many wildlife species and brings humans and animals in close proximity, resulting in increased human–wildlife conflict. In Africa, such conflicts contribute to carnivore population declines in the form of human retaliation for livestock depredation. However, little knowledge exists about when and where carnivores attack livestock. Given this need, our objectives were to (1) understand the spatial and temporal variation of human–carnivore conflict and (2) identify conflict-prone areas. We addressed these objectives in 18 Tanzanian villages of the Maasai Steppe using livestock depredation data on lions (Panthera leo), spotted hyenas ( …

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Examining Patterns Of Animal–Vehicle Collisions In Alabama, Usa, Xiongwen Chen, Shuhong Wu Jan 2014

Examining Patterns Of Animal–Vehicle Collisions In Alabama, Usa, Xiongwen Chen, Shuhong Wu

Human–Wildlife Interactions

Animal–vehicle collisions (AVCs) cause animal death, human injury, and vehicle damage. Uncovering the general patterns and related ecological processes of AVCs is useful for developing mitigation strategies. We examined some previous patterns about AVCs from records in Alabama during 2001 to 2011. The results confirm that: (1) there was a seasonal pattern, with >50% of AVCs occurring in winter; (2) AVCs occurred most frequently at dawn and dusk in the diurnal pattern; and (3) most AVCs occurred on county highways. However, interstate and federal highways had higher numbers of AVCs per km of road. Counties within metropolitan areas had more …

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Efficacy Of Ropel® As A Coyote Repellent, Elizabeth A. Miller, Julie K. Young, Scott Stelting, Bruce A. Kimball Jan 2014

Efficacy Of Ropel® As A Coyote Repellent, Elizabeth A. Miller, Julie K. Young, Scott Stelting, Bruce A. Kimball

Human–Wildlife Interactions

We examined the repellency of a commercially available animal repellent to determine the efficacy of its application to objects that are attractive to coyotes (Canis latrans). Specifically, we aimed to both prevent chewing behavior by coyotes on a nylon-like strapping material, which is used to construct barrier-arresting systems on military airstrips, and determine the ability of the solution to prevent the animals from repeating the undesired behavior. We mixed Ropel® Animal and Rodent Repellent with a liquid latex sticker to form a 2% latex and 98% Ropel solution. We used a 2% latex and 98% water solution as …

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Oil And Gas Impacts On Wyoming’S Sagegrouse: Summarizing The Past And Predicting The Foreseeable Future, Dave H. Applegate, Nick L. Owens Jan 2014

Oil And Gas Impacts On Wyoming’S Sagegrouse: Summarizing The Past And Predicting The Foreseeable Future, Dave H. Applegate, Nick L. Owens

Human–Wildlife Interactions

Historical impacts from oil and gas development to greater sage-grouse (Centrocercus urophasianus) habitat are well-documented in some areas of Wyoming, in particular within natural gas development fields, such as the Powder River Basin and JonahPinedale. The drilling techniques and pad densities in these fields have been extrapolated to estimate future oil and gas impacts in the U. S. Fish and Wildlife Service (2010) warranted-but-precluded listing determination for the sage-grouse under the Endangered Species Act. Further, assumptions regarding the scale of oil and gas development are incorporated within various resource management plan amendments by the Bureau of Land Management …

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A Device For Refilling Practice Bear Spray Canisters, John Gookin, Tom S. Smith, Alison Williams Jan 2014

A Device For Refilling Practice Bear Spray Canisters, John Gookin, Tom S. Smith, Alison Williams

Human–Wildlife Interactions

No abstract provided.

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Squalestatin-Induced Production Of Taxol And Baccatin In Cell Suspension Culture Of Yew (Taxus Baccata L.), Sayed Asadollah Amini, Leila Shabani, Ladan Afghani, Zohreh Jalalpour, Majid Sharifi-Tehrani Jan 2014

Squalestatin-Induced Production Of Taxol And Baccatin In Cell Suspension Culture Of Yew (Taxus Baccata L.), Sayed Asadollah Amini, Leila Shabani, Ladan Afghani, Zohreh Jalalpour, Majid Sharifi-Tehrani

Turkish Journal of Biology

Various elicitors have already been reported to enhance the production of taxol and related taxanes. In this study, effects of a fungal metabolite, squalestatin, on production of taxol and baccatin III were studied. Expressions of 4 key involved genes, ts, dbat, bapt, and dbtnbt, in suspension cultures of Taxus baccata were also detected using qPCR. Results showed that application of squalestatin significantly increased taxol and baccatin III yields. Increased expressions of the genes were in accordance with measures of taxol and baccatin accumulations in cells and medium. Production of H_{2}O_{2} has significant positive correlations with both gene expression and taxanes, …

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Current Paradigms Of Cancer Chemoprevention, Rajendra G. Mehta Jan 2014

Current Paradigms Of Cancer Chemoprevention, Rajendra G. Mehta

Turkish Journal of Biology

Cancer chemoprevention has been continually evolving ever since the term was coined in the 70s. From the original approaches of identifying chemopreventive agents from the dietary constituents based on the epidemiological data to the current status of adapting them from the molecular targets, significant understanding of cancer as a disease and its possible prevention has been achieved. The identification of the chemopreventive agent from a complex mixture of natural product extracts involves numerous steps including bioassay guided fractionation; evaluation of the extracts, fractions and isolated new chemicals selectively using in vitro and in vivo experimental models; and understanding the mechanism …

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Genotoxic, Cytotoxic, And Apoptotic Effects Of Crude Extract Of Usnea Filipendula Stirt. In Vitro, Serap Çeli̇kler Kasimoğullari, Seyhan Oran, Ferda Ari, Engi̇n Ulukaya, Nazlihan Aztopal, Mehmet Sarimahmut, Şule Öztürk Jan 2014

Genotoxic, Cytotoxic, And Apoptotic Effects Of Crude Extract Of Usnea Filipendula Stirt. In Vitro, Serap Çeli̇kler Kasimoğullari, Seyhan Oran, Ferda Ari, Engi̇n Ulukaya, Nazlihan Aztopal, Mehmet Sarimahmut, Şule Öztürk

Turkish Journal of Biology

Lichens are recently receiving great attention because they have potential anticancer activity. Therefore, in this study, genotoxic and antigrowth properties of lichen species Usnea filipendula Stirt. were tested against human breast cancer cell lines (MCF-7 and MDA-MB-231). Antigrowth effect was assayed by the MTT and ATP viability assays. Cell death modes (apoptosis/necrosis) were evaluated morphologically (fluorescence staining) and biochemically (caspase-cleaved cytokeratin 18, caspase-3 activity, and poly-(ADP-ribose) polymerase (PARP) cleavage). Genotoxic activity of U. filipendula was determined by using micronucleus, chromosomal aberration, and comet assays in human lymphocyte culture. U. filipendula inhibited growth in a dose-dependent manner and induced apoptosis by …

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Stimulatory Effect Of Methyl Jasmonate And Squalestatin On Phenolic Metabolism Through Induction Of Lox Activity In Cell Suspension Culture Of Yew, Zohreh Jalalpour, Leila Shabani, Ladan Afghani, Majid Sharifi-Tehrani, Sayed Asadollah Amini Jan 2014

Stimulatory Effect Of Methyl Jasmonate And Squalestatin On Phenolic Metabolism Through Induction Of Lox Activity In Cell Suspension Culture Of Yew, Zohreh Jalalpour, Leila Shabani, Ladan Afghani, Majid Sharifi-Tehrani, Sayed Asadollah Amini

Turkish Journal of Biology

Cell suspension cultures of Taxus baccata were treated with 2 elicitor compounds, methyl jasmonate (MeJA) and squalestatin (S), individually and in combination for 7 days to determine if they mediated the enhancement of biosynthesis of endogenous jasmonate through induction of lipoxygenase (LOX) activity. Total phenolic compounds, total flavonoids, total antioxidants, phenylalanine ammonia-lyase (PAL), polyphenol oxidase (PPO), and LOX activities in 5-month-old yew cell cultures were studied. Our results showed that MeJA and S could stimulate production of phenol derivatives in cell suspension cultures of T. baccata. In parallel to the induction of phenolic production in elicited cells, results showed that …

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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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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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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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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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Global Changes In Mineral Transporters In Tetraploid Switchgrasses (Panicum Virgatum L.), Nathan A. Palmer, Aaron J. Saathoff, Brian M. Waters, Teresa Donze, Tiffany M. Heng-Moss, Paul Twigg, Christian M. Tobias, Gautam Sarath Jan 2014

Global Changes In Mineral Transporters In Tetraploid Switchgrasses (Panicum Virgatum L.), Nathan A. Palmer, Aaron J. Saathoff, Brian M. Waters, Teresa Donze, Tiffany M. Heng-Moss, Paul Twigg, Christian M. Tobias, Gautam Sarath

Department of Agronomy and Horticulture: Faculty Publications

Switchgrass (Panicum virgatum L) is a perennial, C4 grass with great potential as a biofuel crop. An in-depth understanding of the mechanisms that control mineral uptake, distribution, and remobilization will benefit sustainable production. Nutrients are mobilized from aerial portions to below-ground crowns and rhizomes as a natural accompaniment to above-ground senescence post seed-set. Mineral uptake and remobilization is dependent on transporters, however, little if any information is available about the specific transporters that are needed and how their relative expression changes over a growing season.Using well-defined classes of mineral transporters, we identified 520 genes belonging to 40 different transporter …

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Grazing Management Effect On Micro- And Macro- Scale Fate Of C And N In Rangelands, Martha Mamo, Jeff Bradshaw, Richard Ferguson, Kent M. Eskridge, John A. Guretzky, Karla Jenkins, Walter H. Schacht, Jerry Volesky, Sean Whipple, Anita Wingeyer, Haishun Yang Jan 2014

Grazing Management Effect On Micro- And Macro- Scale Fate Of C And N In Rangelands, Martha Mamo, Jeff Bradshaw, Richard Ferguson, Kent M. Eskridge, John A. Guretzky, Karla Jenkins, Walter H. Schacht, Jerry Volesky, Sean Whipple, Anita Wingeyer, Haishun Yang

Department of Agronomy and Horticulture: Faculty Publications

No abstract provided.

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