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2008

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Articles 8761 - 8790 of 15513

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Resting And Reactive Frontal Brain Electrical Activity (Eeg) Among A Non-Clinical Sample Of Socially Anxious Adults: Does Concurrent Depressive Mood Matter?, Elliott A. Beaton, Louis A. Schmidt, A R. Ashbaugh, D L. Santesso, M M. Antony, R E. Mccabe Feb 2008

Resting And Reactive Frontal Brain Electrical Activity (Eeg) Among A Non-Clinical Sample Of Socially Anxious Adults: Does Concurrent Depressive Mood Matter?, Elliott A. Beaton, Louis A. Schmidt, A R. Ashbaugh, D L. Santesso, M M. Antony, R E. Mccabe

Psychology Faculty Publications

A number of studies have noted that the pattern of resting frontal brain electrical activity (EEG) is related to individual differences in affective style in healthy infants, children, and adults and some clinical populations when symptoms are reduced or in remission. We measured self-reported trait shyness and sociability, concurrent depressive mood, and frontal brain electrical activity (EEG) at rest and in anticipation of a speech task in a non-clinical sample of healthy young adults selected for high and low social anxiety. Although the patterns of resting and reactive frontal EEG asymmetry did not distinguish among individual differences in social anxiety, …

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Overwintering Site Selection By Short-Horned Lizards (Phrynosoma Hernandesi) In Northeastern Colorado, Tom Mathies, Daniel J. Martin Feb 2008

Overwintering Site Selection By Short-Horned Lizards (Phrynosoma Hernandesi) In Northeastern Colorado, Tom Mathies, Daniel J. Martin

United States Department of Agriculture Wildlife Services: Staff Publications

Radio telemetry was used to track 16 adult Short-Horned Lizards (Phrynosoma hernandesi) to their individual overwintering sites on the Central Plains Experimental Range (CPER) in Weld County, Colorado. Above-ground habitat characteristics of overwintering sites and randomly selected points within the study area were assessed. All individuals entered overwintering between 29 August and 19 September with a mean estimated entrance date of 7 September. Arrival of the first subzero nighttime air temperatures occurred shortly thereafter on 16 September. No lizard left its normal area of use to overwinter, and there was no tendency to aggregate. Lizards did not necessarily …

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Using Rare Books To Inspire Learning -- Part 1: Anthropology - Diaries, Gene Waddell Feb 2008

Using Rare Books To Inspire Learning -- Part 1: Anthropology - Diaries, Gene Waddell

Against the Grain

No abstract provided.

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With One Stroke Of The Pen: How Can Extension Professionals Involve Developers And Policymakers In Creating Sustainable Communities?, Mark Hostetler, Pierce Jones, Michael Dukes, Hal Knowles Feb 2008

With One Stroke Of The Pen: How Can Extension Professionals Involve Developers And Policymakers In Creating Sustainable Communities?, Mark Hostetler, Pierce Jones, Michael Dukes, Hal Knowles

Journal of Extension

Residential developments have a huge impact on natural resources, and sustainable or "green" communities are beginning to be built throughout the United States. Ultimately, with one stroke of a pen, developers, planners, and policymakers determine how a community will look and feel for many years to come. To interface with this non-traditional audience, we have created a new program called the Program for Resource Efficient Communities (PREC ) at the University of Florida. Through our experiences, we discuss the importance of partnering with developers, planners, and policymakers, and techniques to create resource-efficient communities.

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Structure And Metal Binding Properties Of Znua, A Periplasmic Zinc Transporter From Escherichia Coli, Liliya A. Yatsunyk, J. Allen Easton, Lydia R. Kim, Stacy A. Sugarbaker, Brian Bennett, Robert M. Breece, Ivan I. Vorontsov, David L. Tierney, Michael W. Crowder, Amy C. Rosenzweig Feb 2008

Structure And Metal Binding Properties Of Znua, A Periplasmic Zinc Transporter From Escherichia Coli, Liliya A. Yatsunyk, J. Allen Easton, Lydia R. Kim, Stacy A. Sugarbaker, Brian Bennett, Robert M. Breece, Ivan I. Vorontsov, David L. Tierney, Michael W. Crowder, Amy C. Rosenzweig

Physics Faculty Research and Publications

ZnuA is the periplasmic Zn2+-binding protein associated with the high-affinity ATP-binding cassette ZnuABC transporter from Escherichia coli. Although several structures of ZnuA and its homologs have been determined, details regarding metal ion stoichiometry, affinity, and specificity as well as the mechanism of metal uptake and transfer remain unclear. The crystal structures of E. coli ZnuA (Eco-ZnuA) in the apo, Zn2+-bound, and Co2+-bound forms have been determined. ZnZnuA binds at least two metal ions. The first, observed previously in other structures, is coordinated tetrahedrally by Glu59, His60, His143, and His207. Replacement of Zn2+ …

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Templated Biomimetic Multifunctional Coatings, Chih-Hung Sun, Adriel Gonzalez, Nicholas C. Linn, Peng Jiang, Bin Jiang Feb 2008

Templated Biomimetic Multifunctional Coatings, Chih-Hung Sun, Adriel Gonzalez, Nicholas C. Linn, Peng Jiang, Bin Jiang

Mathematics and Statistics Faculty Publications and Presentations

We report a bioinspired templating technique for fabricating multifunctional optical coatings that mimic both unique functionalities of antireflective moth eyes and superhydrophobic cicada wings. Subwavelength-structured fluoropolymer nipple arrays are created by a soft-lithography-like process. The utilization of fluoropolymers simultaneously enhances the antireflective performance and the hydrophobicity of the replicated films. The specular reflectivity matches the optical simulation using a thin-film multilayer model. The dependence of the size and the crystalline ordering of the replicated nipples on the resulting antireflective properties have also been investigated by experiment and modeling. These biomimetic materials may find important technological application in self-cleaning antireflection coatings.

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Expression And Evolutionary Relationships Of The Chenopodium Quinoa 11s Seed Storage Protein Gene, Mikel Stevens, Peter J. Maughan, Daniel J. Fairbanks, Marie R. B. Balzotti, Jennifer N. Thornton, David A. Mcclellan, Eric N. Jellen, Craig E. Coleman Feb 2008

Expression And Evolutionary Relationships Of The Chenopodium Quinoa 11s Seed Storage Protein Gene, Mikel Stevens, Peter J. Maughan, Daniel J. Fairbanks, Marie R. B. Balzotti, Jennifer N. Thornton, David A. Mcclellan, Eric N. Jellen, Craig E. Coleman

Faculty Publications

Quinoa (Chenopodium quinoa Willd.) is a food crop cultivated by subsistence farmers and commercial growers on the high Andean plateau, primarily in Bolivia, Peru, and Chile. Present interest in quinoa is due to its tolerance of harsh environments and its nutritional value. It is thought that the seed storage proteins of quinoa, particularly the 11S globulins and 2S albumins, are responsible for the relatively high protein content and ideal amino acid balance of the quinoa seed. Here we report the genomic and cDNA sequences for two 11S genes representing two orthologous loci from the quinoa genome. Important features of the …

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Non-Enzymatic Glycation In Diabetic Complications, Fatma Hussain, Munir A. Sheikh, Mohammad Arif, Arooj Arshad, Amer Jamil Feb 2008

Non-Enzymatic Glycation In Diabetic Complications, Fatma Hussain, Munir A. Sheikh, Mohammad Arif, Arooj Arshad, Amer Jamil

Saudi Medical Journal

No abstract provided.

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Possible Predisposing Factors For Thrombotic Cerebrovascular Accidents In Sudanese Patients, Abdelgadir H. Elagib, Ammar E. Ahmed, Abbashar Hussein, Ahmed M. Musa, Eltahir A. Khalil, Ahmed M. El-Hassan Feb 2008

Possible Predisposing Factors For Thrombotic Cerebrovascular Accidents In Sudanese Patients, Abdelgadir H. Elagib, Ammar E. Ahmed, Abbashar Hussein, Ahmed M. Musa, Eltahir A. Khalil, Ahmed M. El-Hassan

Saudi Medical Journal

No abstract provided.

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Effects Of Crocus Sativus On The Fetal Development Of Nmri Mice, Mohammad J. Golalipour, Anneh M. Gharravi, Sorya Ghafari, Mohammad Afshar, Vahid Khori Feb 2008

Effects Of Crocus Sativus On The Fetal Development Of Nmri Mice, Mohammad J. Golalipour, Anneh M. Gharravi, Sorya Ghafari, Mohammad Afshar, Vahid Khori

Saudi Medical Journal

No abstract provided.

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The Differential Impact Of Relational Health On Alcohol Consumption And Consequences In First Year College Women, Joseph W. Labrie, Alysha D. Thompson, Paul Ferraiolo, Jonathan A. Garcia, Karie Huchting, Kristin Shelesky Feb 2008

The Differential Impact Of Relational Health On Alcohol Consumption And Consequences In First Year College Women, Joseph W. Labrie, Alysha D. Thompson, Paul Ferraiolo, Jonathan A. Garcia, Karie Huchting, Kristin Shelesky

Heads Up!

The Relational Health Indices (RHI) is a relatively new measure that assesses the strength of relationships. It has been found that relational health has a protective factor for women, such that it enhances positive experiences and limits negative ones. The current study is the first to use the RHI to examine the effect of relational health on alcohol consumption and alcohol consequences. First year college women were given questionnaires assessing relational health, drinking motives, and alcohol use in their first few months at a mid-sized, private university. Due to the social nature of college settings, it was predicted that relational …

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Towards A New Russia Policy, Stephen J. Blank Dr. Feb 2008

Towards A New Russia Policy, Stephen J. Blank Dr.

Books, Monographs & Collaborative Studies

It is obvious that U.S.-Russian relations and East-West relations more broadly have recently deteriorated. Yet analyses of why this is the case have often been confined to American policy. The author examines some of the key strategic issues at stake in this relationship and traces that decline to Russian factors which have been overlooked or neglected. At the same time, he has devoted considerable time to recording some of the shortcomings of U.S. policy and recommending a way out of the growing impasse confronting both sides.

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Postgraduate Conference Fund, Conference Reports: Complexity In Geomorphology: 38th Annual Binghamton Geomorphology Symposium, Duke University, North Carolina, Usa, 5-7 October 2007, Caroline M. Burberry Feb 2008

Postgraduate Conference Fund, Conference Reports: Complexity In Geomorphology: 38th Annual Binghamton Geomorphology Symposium, Duke University, North Carolina, Usa, 5-7 October 2007, Caroline M. Burberry

Department of Earth and Atmospheric Sciences: Faculty Publications

The British Society for Geomorphology Postgraduate Conference Fund, Conference Report on Complexity in Geomorphology: 38th Annual Binghamton Geomorphology Symposium, held at Duke University, North Carolina, USA, October 5-7, 2007.

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Repression Of Proinflammatory Gene Expression By Lipid Extract Of Nostoc Commune Var Sphaeroides Kützing, A Blue-Green Alga, Via Inhibition Of Nuclear Factor-Κb In Raw 264.7 Macrophages, Young-Ki Park, Heather E. Rasmussen, Sarah J. Ehlers, Kara R. Blobaum, Fan Lu, Vicki L. Schlegel, Timothy P. Carr, Ji-Young Lee Feb 2008

Repression Of Proinflammatory Gene Expression By Lipid Extract Of Nostoc Commune Var Sphaeroides Kützing, A Blue-Green Alga, Via Inhibition Of Nuclear Factor-Κb In Raw 264.7 Macrophages, Young-Ki Park, Heather E. Rasmussen, Sarah J. Ehlers, Kara R. Blobaum, Fan Lu, Vicki L. Schlegel, Timothy P. Carr, Ji-Young Lee

Department of Food Science and Technology: Faculty Publications

We investigated whether lipid extract from a blue-green alga, N. commune, modulates proinflammatory gene expression in RAW 264.7 macrophages. The cells were incubated with N. commune lipid extract (0–100 μg/mL) and subsequently activated by LPS (100 ng/mL). Quantitative real-time PCR analysis showed that mRNA abundance of proinflammatory mediators, including TNF-α, COX-2, IL-1β, IL-6, and iNOS, was significantly reduced by N. commune lipid extract in a dose-dependent manner. Secretion of TNF-α and IL-1β into cell culture medium was also significantly decreased by N. commune lipid extract. Thin-layer chromatography-densitometry analysis showed that N. commune …

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Silvopasture: Establishment & Management Principles For Pine Forests In The Southeastern United States Feb 2008

Silvopasture: Establishment & Management Principles For Pine Forests In The Southeastern United States

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Silvopasture is an agroforestry practice that integrates livestock, forage production, and forestry on the same land management unit. Silvopasture systems are deliberately designed and managed to produce a high-value timber product (such as sawtimber) in the long term while providing short-term annual economic benefit from a livestock component through the management of forage or an annual crop component.

Well-managed silvopasture systems may also:

• Improve overall economic performance of a farm enterprise through diversification and maintaining biodiversity

• Maintain or increase tree growth

• Improve cool-season grass production

• Allow warm-season grass production with careful canopy management

• Provide shade …

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Soil Modification By Invasive Plants: Effects On Native And Invasive Species Of Mixed-Grass Prairies, Nicholas R. Jordan, Diane L. Larson, Sheri C. Huerd Feb 2008

Soil Modification By Invasive Plants: Effects On Native And Invasive Species Of Mixed-Grass Prairies, Nicholas R. Jordan, Diane L. Larson, Sheri C. Huerd

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Invasive plants are capable of modifying attributes of soil to facilitate further invasion by conspecifics and other invasive species. We assessed this capability in three important plant invaders of grasslands in the Great Plains region of North America: leafy spurge (Euphorbia esula), smooth brome (Bromus inermis) and crested wheatgrass (Agropyron cristatum). In a glasshouse, these three invasives or a group of native species were grown separately through three cycles of growth and soil conditioning in both steam-pasteurized and non-pasteurized soils, after which we assessed seedling growth in these soils. Two of the three invasive …

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Automated Bead-Trapping Apparatus And Control System For Single-Molecule Dna Sequencing, Gregory Bashford, Don Lamb, Dan Grone, Bob Eckles, Kevin Kornelsen, Lyle Middendorf, John Williams Feb 2008

Automated Bead-Trapping Apparatus And Control System For Single-Molecule Dna Sequencing, Gregory Bashford, Don Lamb, Dan Grone, Bob Eckles, Kevin Kornelsen, Lyle Middendorf, John Williams

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Abstract: We have been investigating a microfluidics platform for highspeed, low-cost sequencing of single DNA molecules using novel “chargeswitch” nucleotides. A significant challenge is the design of a flowcell suitable for manipulating bead-DNA complexes and sorting labeled polyphosphate molecules by charge. The flowcell is part of a singlemolecule detection instrument, creating fluorescence images from labeled polyphosphates. These images would ultimately be analyzed by signal processing algorithms to identify specific nucleotides in a DNA sequence. Here we describe requirements of the fluidics system for loading, identifying, tracking, and positioning beads. By dynamically modulating pressure gradients in the plenum chambers of a …

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Herbivore-Mediated Ecological Costs Of Reproduction Shape The Life History Of An Iteroparous Plant, Tom E. X. Miller, Brigitte Tenhumberg, Svata M. Louda Feb 2008

Herbivore-Mediated Ecological Costs Of Reproduction Shape The Life History Of An Iteroparous Plant, Tom E. X. Miller, Brigitte Tenhumberg, Svata M. Louda

School of Biological Sciences: Faculty Publications

Plant reproduction yields immediate fitness benefits but can be costly in terms of survival, growth, and future fecundity. Lifehistory theory posits that reproductive strategies are shaped by tradeoffs between current and future fitness that result from these direct costs of reproduction. Plant reproduction may also incur indirect ecological costs if it increases susceptibility to herbivores. Yet ecological costs of reproduction have received little empirical attention and remain poorly integrated into life-history theory. Here, we provide evidence for herbivore-mediated ecological costs of reproduction, and we develop theory to examine how these costs influence plant life-history strategies. Field experiments with an iteroparous …

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The Role Of Phylogeny And Ecology In Experimental Host Specificity: Inisights From A Eugregarine-Host System, Jillian Tikka Detwiler, John J. Janovy Jr. Feb 2008

The Role Of Phylogeny And Ecology In Experimental Host Specificity: Inisights From A Eugregarine-Host System, Jillian Tikka Detwiler, John J. Janovy Jr.

John J. Janovy, Jr. Publications

The degree to which parasites use hosts is fundamental to host–parasite coevolution studies, yet difficult to assess and interpret in an evolutionary manner. Previous assessments of parasitism in eugregarine–host systems suggest high degrees of host specificity to particular host stages and host species; however, rarely have the evolutionary constraints on host specificity been studied experimentally. A series of experimental infections were conducted to determine the extent of host stadium specificity (larval vs. adult stage) and host specificity among 6 tenebrionid host species and 5 eugregarine parasite species. Eugregarines from all host species infected both the larva and adult stages of …

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Substrate-Dependent Signaling Success In The Wolf Spider, Schizocosa Retrorsa, Eileen Hebets, Damian O. Elias, Andrew C. Mason, Gary L. Miller, Gail E. Stratton Feb 2008

Substrate-Dependent Signaling Success In The Wolf Spider, Schizocosa Retrorsa, Eileen Hebets, Damian O. Elias, Andrew C. Mason, Gary L. Miller, Gail E. Stratton

Eileen Hebets Publications

Signals used in communication are often hypothesized to be optimally designed for their signaling environment. Here, we explore the importance of signaling substrate on seismic signal efficacy and reproductive behavior in the wolf spider, Schizocosa retrorsa: a species found on multiple signaling substrates (pine litter and/or red clay or sand). In this multimodal signaling species, simultaneous with conspicuous visual displays, males produce percussive seismic signals via an impulse mechanism which tends to excite a substrate evenly across a wide band of frequencies. We first quantified the transmission characteristics of this broadband percussive signal by playing recorded signals back across three …

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Antioxidant Status In Diabetic And Non-Diabetic Senile Patients, With Cataract Or Cardiovascular Complications, Anjuman Gul, Muhammad A. Rahman Feb 2008

Antioxidant Status In Diabetic And Non-Diabetic Senile Patients, With Cataract Or Cardiovascular Complications, Anjuman Gul, Muhammad A. Rahman

Saudi Medical Journal

OBJECTIVE: To assess the total antioxidant status in diabetic and non-diabetic senile patients, with cataract or cardiovascular complications, and without complications. METHODS: A comparative study on 186 senile patients and control subjects was carried out from March 2004 to November 2006 on patients from Ziauddin University Hospital, Karachi, Pakistan. Among them, 33 were diabetic patients without any clinical evidence of chronic diabetic complications, 32 with cardiovascular complications, 30 non-diabetic patients with cardiovascular complications, 30 diabetic patients with cataract, 30 non-diabetic patients with cataract, and 31 apparently normal, age, gender, and weight matched control subjects were investigated. All patients were selected …

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Fetal And Neonatal Responses Following Maternal Exposure To Mobile Phones, Ahmed Y. Rezk, Khaled Abdulqawi, Randa M. Mustafa, Hesham Al-Inany Feb 2008

Fetal And Neonatal Responses Following Maternal Exposure To Mobile Phones, Ahmed Y. Rezk, Khaled Abdulqawi, Randa M. Mustafa, Hesham Al-Inany

Saudi Medical Journal

OBJECTIVE: To study fetal and neonatal heart rate (HR) and cardiac output (COP), following acute maternal exposure to electromagnetic fields (EMF) emitted by mobile phones. METHODS: The present study was carried out at Benha University Hospital and El-Shorouq Hospital, Cairo, Egypt, from October 2003 to March 2004. Ninety women with uncomplicated pregnancies aged 18-33 years, and 30 full term healthy newborn infants were included. The pregnant mothers were exposed to EMF emitted by mobile telephones while on telephone-dialing mode for 10 minutes during pregnancy and after birth. The main outcome were measurements of fetal and neonatal HR and COP. RESULTS: …

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Autologous Serum Is More Effective Than Fetal Bovine Serum On Proliferation Of Bone Marrow Derived Human Mesenchymal Stem Cells, Mustafa Yilmaz, Ercument Ovali, Elif Akdogan, Ahmet Durmus, Mehmet Sonmez, Tamer Dikmen, Serdar B. Omay Feb 2008

Autologous Serum Is More Effective Than Fetal Bovine Serum On Proliferation Of Bone Marrow Derived Human Mesenchymal Stem Cells, Mustafa Yilmaz, Ercument Ovali, Elif Akdogan, Ahmet Durmus, Mehmet Sonmez, Tamer Dikmen, Serdar B. Omay

Saudi Medical Journal

No abstract provided.

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Prevalence Of Smoking Among Female Medical Students In The College Of Medicine, Riyadh, Saudi Arabia, Yousef A. Al-Turki, Norah A. Al-Rowais Feb 2008

Prevalence Of Smoking Among Female Medical Students In The College Of Medicine, Riyadh, Saudi Arabia, Yousef A. Al-Turki, Norah A. Al-Rowais

Saudi Medical Journal

No abstract provided.

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Gastroesophageal Reflux Disease Is Frequently Present In Patients With Laryngeal And Voice Disorders., Rinaldo Pellicano, Sharmila Fagonee, Hassan A. Bokhary Feb 2008

Gastroesophageal Reflux Disease Is Frequently Present In Patients With Laryngeal And Voice Disorders., Rinaldo Pellicano, Sharmila Fagonee, Hassan A. Bokhary

Saudi Medical Journal

No abstract provided.

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A Tick From A Prehistoric Arizona Coprolite, Keith L. Johnson, Karl J. Reinhard, Luciana Sianto, Adauto Araújo, Scott Lyell Gardner, John J. Janovy Jr. Feb 2008

A Tick From A Prehistoric Arizona Coprolite, Keith L. Johnson, Karl J. Reinhard, Luciana Sianto, Adauto Araújo, Scott Lyell Gardner, John J. Janovy Jr.

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Ticks have never been reported in archaeological analyses. Here, we present the discovery of a tick from a coprolite excavated from Antelope Cave in extreme northwest Arizona. Dietary analysis indicates that the coprolite has a human origin. This archaeological occupation is associated with the Ancestral Pueblo culture (Anasazi). This discovery supports previous hypotheses that ticks were a potential source of disease and that ectoparasites were eaten by ancient people.

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Two Cyclocoelids From The Lesser Yellowlegs, Tringa Flavipes (Scolopacidae), From The Central Flyway Of North America, Including The Description Of Haematotrephus Selfi N. Sp. (Digenea: Cyclocoelidae), Norman O. Dronen, Scott Lyell Gardner, F. Agustin Jimenez-Ruiz Feb 2008

Two Cyclocoelids From The Lesser Yellowlegs, Tringa Flavipes (Scolopacidae), From The Central Flyway Of North America, Including The Description Of Haematotrephus Selfi N. Sp. (Digenea: Cyclocoelidae), Norman O. Dronen, Scott Lyell Gardner, F. Agustin Jimenez-Ruiz

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Seven specimens of cyclocoelids (6 specimens representing Haematotrephus selfi n. sp. and 1 specimen representing a second unidentified species of Haematotrephus) collected by the late Dr. J. Teague Self, former professor, Department of Zoology, University of Oklahoma, Norman, Oklahoma, U.S.A., from the body cavities of 3 lesser yellowlegs, Tringa flavipes, (2 birds collected from Roger Mills County, Oklahoma on 23 and 29 August 1963, and 1 collected from Manitoba, Canada on 3 June 1964) and deposited in the Manter Laboratory of Parasitology, University of Nebraska, Lincoln, Nebraska are described. Haematotrephus selfi n. sp. can be distinguished from all …

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Re-Homing Exotic Species--A Pilot Program To Prevent Release Of Exotic Aquatic Pet Species, Andrew M. Lazur, Ruth Hanessian Feb 2008

Re-Homing Exotic Species--A Pilot Program To Prevent Release Of Exotic Aquatic Pet Species, Andrew M. Lazur, Ruth Hanessian

Journal of Extension

An educational poster program designed to inform pet owners of the dangers of releasing exotic species and provide a re-homing mechanism was evaluated as a means to reduce unwanted environmental releases. The poster provided a URL to the program partners' Web site, which listed participating re-homing pet shops in Maryland. Survey results revealed that 201 aquatic animals were re-homed.1 Survey respondents rated the poster at 94% and 92% percent for educating consumers of the potential of re-homing and benefits to the pet industry, respectively. The program provides a proactive opportunity and alternative to environmental release of exotic species.

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Biomass And Toxicity Responses Of Poison Ivy (Toxicodendron Radicans) To Elevated Atmospheric Co2: Comment, Stefan A. Schnitzer, Ronald A. Londre, John Klironomos, Peter B. Reich Feb 2008

Biomass And Toxicity Responses Of Poison Ivy (Toxicodendron Radicans) To Elevated Atmospheric Co2: Comment, Stefan A. Schnitzer, Ronald A. Londre, John Klironomos, Peter B. Reich

Biological Sciences Faculty Research and Publications

No abstract provided.

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Historic Genetic Structuring And Paraphyly Within The Great-Tailed Grackle, Jeffrey M. Dacosta, Walter Wehtje, John Klicka Feb 2008

Historic Genetic Structuring And Paraphyly Within The Great-Tailed Grackle, Jeffrey M. Dacosta, Walter Wehtje, John Klicka

Ornithology Program (HRC)

The Great-tailed Grackle (Quiscalus mexicanus) and Boat-tailed Grackle (Q. major) are sister species that have expanded their ranges during historical times. This expansion has created an area of sympatry between these species in Texas and Louisiana, and between distinctive Great-tailed Grackle subspecies in the southwestern United States and northern Mexico. We investigated the evolutionary histories of both species using mitochondrial DNA sequence data and modern phylogenetic methods. Our results reveal genetic structure within Great-tailed, but not Boat-tailed Grackles. Great-tailed Grackles are separated into two clades, but range expansion in the north has led to secondary contact …

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