Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Brigham Young University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 3811 - 3840 of 10994

Full-Text Articles in Entire DC Network

The Antioxidant And Dna Repair Capacities Of Resveratrol, Piceatannol, And Pterostilbene, Justin Ryan Livingston Jun 2015

The Antioxidant And Dna Repair Capacities Of Resveratrol, Piceatannol, And Pterostilbene, Justin Ryan Livingston

Theses and Dissertations

Lifestyle diseases represent a large burden on developed societies and account for much morbidity worldwide. Research has shown that eating a diet rich in fruit and vegetables helps to ameliorate and prevent some of these diseases. Antioxidants found in fruits and vegetables may provide a substantial benefit in reducing disease incidence. This thesis examines the antioxidant properties of resveratrol, piceatannol, and pterostilbene, and the ability of Burkitt's Lymphoma (Raji) cells to uptake these three antioxidants. It also studies the effect of the antioxidants in protecting against DNA damage and their role in DNA repair following oxygen radical exposure in Raji …

Go to article

Investigation Of Parameters Affecting The Nanoinjection Of Hela 229 Cancer Cells, Tyler E. Lewis Jun 2015

Investigation Of Parameters Affecting The Nanoinjection Of Hela 229 Cancer Cells, Tyler E. Lewis

Theses and Dissertations

The ability to deliver sequences of DNA and other molecular loads across the membrane of a cell and into its nucleus is an area of interest in the medical community. One of its many applications is that of gene therapy. In contrast to other forms of treatment, gene therapy seeks to treat diseases at the cellular level. The success of these treatments depends on the technologies for cell transfection that are available. Physical methods are sometimes able to overcome poor efficiencies of chemical methods and the safety concerns of viral methods, but are usually impractical due to the limited number …

Go to article

Assessing Validity Of A Screener For Social, Emotional, And Behavioral Concerns: Analyzing Gender Differences In A Middle School Population, Kimberly Lowe Jun 2015

Assessing Validity Of A Screener For Social, Emotional, And Behavioral Concerns: Analyzing Gender Differences In A Middle School Population, Kimberly Lowe

Theses and Dissertations

Systematic screening for social, emotional, and behavioral concerns (SEBC) identifies at-risk students and provides information to guide interventions that may prevent negative outcomes (Glover & Albers, 2006; Kauffman, 1999; Severson, Walker, Hope-Dolittle, Katochwill, & Gresham, 2007). However, the screening process may be influenced by the gender of the student (Young, Sabbah, Young, Reiser, & Richardson, 2010). This study further examined the influence of student gender on screening by assessing the congruency of gates one and two of a screening process based on student gender. Participants included 59 middle school teachers who nominated at-risk students on the Teacher Nomination Form (TNF; …

Go to article

Cigarette Smoke Increases Cardiomyocyte Ceramide Accumulation And Inhibits Mitochondrial Respiration, Trevor Stanley Tippetts Jun 2015

Cigarette Smoke Increases Cardiomyocyte Ceramide Accumulation And Inhibits Mitochondrial Respiration, Trevor Stanley Tippetts

Theses and Dissertations

Cigarette smoking is a common and lethal worldwide habit, with considerable mortality stemming from its deleterious effects on heart function. While current theories posit altered blood lipids and fibrinogen metabolism as likely mediators, none have explored the role of the sphingolipid ceramide in exacerbating heart function with smoke exposure. Ceramide production is a consequence of cigarette smoke in the lung, and considering ceramide's harmful effects on mitochondrial function, we sought to elucidate the role of ceramide in mediating smoke-induced altered heart mitochondrial respiration. Lung cells were exposed to cigarette smoke extract and heart cells were exposed to the lung-cell conditioned …

Go to article

Orchestrating Mathematical Discussions: A Novice Teacher's Implementation Of Five Practices To Develop Discourse Orchestration In A Sixth-Grade Classroom, Jeffrey Stephen Young Jun 2015

Orchestrating Mathematical Discussions: A Novice Teacher's Implementation Of Five Practices To Develop Discourse Orchestration In A Sixth-Grade Classroom, Jeffrey Stephen Young

Theses and Dissertations

This action research study examined my attempts during a six-lesson unit of instruction to implement five practices developed by Stein, Engle, Smith, and Hughes (2008) to assist novice teachers in orchestrating meaningful mathematical discussions, a component of inquiry-based teaching and learning. These practices are anticipating student responses to a mathematical task, monitoring student responses while they engage with the task, planning which of those responses will be shared, planning the sequence of that sharing, and helping students make connections among student responses. Although my initial anticipations of student responses were broad and resulted in unclear expectations during lesson planning, I …

Go to article

Synthesis, Rna Binding And Antibacterial Studies Of 2-Dos Mimetics And Development Of Polymer Supported Nanoparticle Catalysts For Nitroarene And Azide Reduction, Venkata Reddy Udumula Jun 2015

Synthesis, Rna Binding And Antibacterial Studies Of 2-Dos Mimetics And Development Of Polymer Supported Nanoparticle Catalysts For Nitroarene And Azide Reduction, Venkata Reddy Udumula

Theses and Dissertations

Project I 2-Deoxystreptamine (2-DOS), the most conserved central scaffold of aminoglycosides, is known to specifically recognize the 5'-GU-'3 sequence step through highly conserved hydrogen bonds and electrostatic interactions within and without the context of aminoglycosides (Figure 1a). We proposed that a novel monomeric unnatural amino acid building block using 2-DOS as a template would allow us to develop RNA binding molecules with higher affinity and selectivity than those currently available. Conjugating two or more of the monomeric building blocks by an amide bond would introduce extra hydrogen bonding donors and acceptors that are absent in natural aminoglycosides and increase specificity …

Go to article

Patterns In Impact, Publication And Themes In International Blended Learning, Kristian Joy Spring Jun 2015

Patterns In Impact, Publication And Themes In International Blended Learning, Kristian Joy Spring

Theses and Dissertations

This research has found that the field of international blended learning (BL) is prepared for stronger communication and collaboration. Collaboration is currently limited, and regions vary greatly in terms of citations. However, BL is growing worldwide and each region has much to offer to the community. Greater collaboration among researchers and practitioners can be profitable regardless of location. In the first article the authors compared the top cited BL articles to understand which articles from each region are the most cited, how the regions compare in terms of citations and which journals publish these highly cited articles. The authors used …

Go to article

Identifying And Characterizing Yeast Pas Kinase 1 Substrates Reveals Regulation Of Mitochondrial And Cell Growth Pathways, Desiree Demille Jun 2015

Identifying And Characterizing Yeast Pas Kinase 1 Substrates Reveals Regulation Of Mitochondrial And Cell Growth Pathways, Desiree Demille

Theses and Dissertations

Glucose allocation is an important cellular process that is misregulated in the interrelated diseases obesity, diabetes and cancer. Cells have evolved critical mechanisms for regulating glucose allocation, one of which is sensory protein kinases. PAS kinase is a key sensory protein kinase that regulates glucose allocation in yeast, mice and man; and is a novel therapeutic target for the treatment of metabolic diseases such as obesity, diabetes and cancer. Despite its importance, the molecular mechanisms of PAS kinase function are largely unknown. Through large-scale protein-interaction studies, we have identified 93 novel binding partners for PAS kinase which help to expand …

Go to article

Hmgb1 And Ceramides: Potential Mediators Of Cigarette Smoke-Induced Metabolic Dysfunction, Mikayla Orton Thatcher Jun 2015

Hmgb1 And Ceramides: Potential Mediators Of Cigarette Smoke-Induced Metabolic Dysfunction, Mikayla Orton Thatcher

Theses and Dissertations

While cigarette smoking is a common-knowledge way to stay lean, it has long been known as a risk factor for diabetes and obesity. Here we establish that smoking causes fat gain and metabolic disruption in mice, effects which are exacerbated by a high-fat, high-sugar diet. We found that smoke exposure increases levels of ceramide—the lipid responsible for diet-induced insulin resistance—and that blocking ceramide production with the pharmacological inhibitor myriocin restored insulin sensitivity, stopped weight gain, and rescued mitochondrial respiration in vivo and in vitro.We also sought to assess the impact of the RAGE ligand HMGB1 on skeletal muscle metabolism. We …

Go to article

A Study Of Allylic Aminations As Catalyzed By Heterobimetallic Pd-Ti Complexes, Diana Lauren Ellis Jun 2015

A Study Of Allylic Aminations As Catalyzed By Heterobimetallic Pd-Ti Complexes, Diana Lauren Ellis

Theses and Dissertations

Heterobimetallic complexes present a unique approach to catalyzing challenging reactions. By having two metals in close proximity to each other, the metals are able to interact and alter their electronics in a way that simple organic ligands (carbon, nitrogen, sulfur etc.) cannot. Our studies of heterobimetallic complexes focus on a Pd–Ti complex. The complex features a dative interaction between the palladium and the titanium held together by a phosphonamide scaffold. This interaction increases the electrophilicity of the palladium and makes it a very suitable catalyst for allylic amination reactions. We have conducted extensive studies of this catalyst in allylic aminations, …

Go to article

Advancing Phage Genomics And Honeybee Health Through Discovery And Characterization Of Paenibacillaceae Bacteriophages, Bryan Douglas Merrill Jun 2015

Advancing Phage Genomics And Honeybee Health Through Discovery And Characterization Of Paenibacillaceae Bacteriophages, Bryan Douglas Merrill

Theses and Dissertations

The Paenibacillaceae family of bacteria includes two species known to infect the hives of honeybees, Paenibacillus larvae and Brevibacillus laterosporus. P. larvae, the causative agent of American Foulbrood (AFB) causes a lethal infection of honeybee larvae, while B. laterosporus is a secondary invader following European Foulbrood (EFB) infection. Increasing antibiotic resistance of P. larvae bacteria has prompted a search for alternative treatment methods for this disease. Bacteriophages are the most diverse life forms on earth and can provide important insights about the bacterial hosts they infect. However, few Paenibacillaceae phages have been isolated or characterized. In this study, the first …

Go to article

The Cost Effectiveness Of Psychotherapy For Treating Adults With Post-Traumatic Stress Disorder, Micah Lavar Ingalls Jun 2015

The Cost Effectiveness Of Psychotherapy For Treating Adults With Post-Traumatic Stress Disorder, Micah Lavar Ingalls

Theses and Dissertations

This paper presents results from cost-analysis research for treating Post-Traumatic Stress Disorder in adults. Data for this research was provided by Cigna, a nation-wide healthcare manager in the United States of America. The sample size was 12,845 adults who were diagnosed with PTSD and received outpatient individual and family psychotherapy from one of the following mental health care providers: Marriage and Family Therapists (MFTs), Master’s Nurses (RNs), Medical Doctors (MDs), Professional Counselors (LPCs), Psychologists (PSYs), and Social Workers (MSWs). Results were compared across treatment modality, across practitioner license type and between practitioner educational levels. The results demonstrated that family therapy …

Go to article

Isolation And Host Range Of Staphylococcus Aureus Bacteriophages And Use For Decontamination Of Fomites, Kyle C. Jensen Jun 2015

Isolation And Host Range Of Staphylococcus Aureus Bacteriophages And Use For Decontamination Of Fomites, Kyle C. Jensen

Theses and Dissertations

Staphylococcus aureus is a common bacterium found on the skin and mucosal membranes of about 20% of the population. S. aureus growth on the skin is harmless, but if it bypasses the skin it can causes life-threatening diseases such as pneumonia, meningitis, bacteremia, and sepsis. Antibiotic-resistant strains of S. aureus, called Methicillin Resistant S. aureus (MRSA), are resistant to most antibiotics except vancomycin. However, vancomycin resistant strains of MRSA are becoming more common. In this study, 12 phages were isolated capable of infecting human S. aureus and/or MRSA strains. Five phages were discovered through mitomycin C induction of prophages and …

Go to article

Estimating Pinyon And Juniper Cover Across Utah Using Naip Imagery, Darrell B. Roundy Jun 2015

Estimating Pinyon And Juniper Cover Across Utah Using Naip Imagery, Darrell B. Roundy

Theses and Dissertations

Expansion of Pinus L. (pinyon) and Juniperus L. (juniper) (P-J) trees into sagebrush (Artemisia L.) steppe communities can lead to negative effects on hydrology, loss of wildlife habitat, and a decrease in desirable understory vegetation. Tree reduction treatments are often implemented to mitigate these negative effects. In order to prioritize and effectively plan these treatments, rapid, accurate, and inexpensive methods are needed to estimate tree canopy cover at the landscape scale. We used object based image analysis (OBIA) software (Feature AnalystTM for ArcMap 10.1®, ENVI Feature Extraction®, and Trimble eCognition Developer 8.2®) to extract tree canopy cover using NAIP (National …

Go to article

Botheration And Recognition Of Prescriptive Rules, Sara D. Smith Jun 2015

Botheration And Recognition Of Prescriptive Rules, Sara D. Smith

Theses and Dissertations

Passions flare up around the use and “misuse” of prescriptive rules. Where there is variation in language use, language judgment usually follows—attaching value judgment to linguistic variants forms the foundation of prescriptive ideology in English. Prescriptive attitudes prevail among speakers and writers of English, who feel some pressure to use these forms to avoid a negative judgment. This study surveyed American English speakers using Mechanical Turk to determine which types of rules—spelling, syntactic, morphological, and lexical—bother people the most and inspire the harshest judgments when violated. The surveys asked participants to identify a violated prescriptive rule in a sentence, found …

Go to article

Does Video Game Content Matter? An Examination Of Two Competing Ideas, Nathan J. Smith Jun 2015

Does Video Game Content Matter? An Examination Of Two Competing Ideas, Nathan J. Smith

Theses and Dissertations

The current paper addresses the associations between video game content (i.e., physically aggressive, relationally aggressive, and prosocial) and physical aggression, relational aggression, and prosocial behavior in two distinct developmental periods. The purpose of the paper is to test whether playing video games with a particular type of content influences behaviors over time, or whether individuals who have higher levels of physical aggression, relational aggression, or prosocial behavior prefer to play games with similar content. Two theories will be simultaneously examined and tested in order to determine the relative merit in using each in research examining the relationships between video game …

Go to article

Bioinformatics For The Comparative Genomic Analysis Of The Cotton (Gossypium) Polyploid Complex, Justin Thomas Page Jun 2015

Bioinformatics For The Comparative Genomic Analysis Of The Cotton (Gossypium) Polyploid Complex, Justin Thomas Page

Theses and Dissertations

Understanding the composition, evolution, and function of the cotton (Gossypium) genome is complicated by the joint presence of two genomes in its nucleus (AT and DT genomes). Specifically, read-mapping (a fundamental part of next-generation sequence analysis) cannot adequately differentiate reads as belonging to one genome or the other. These two genomes were derived from progenitor A-genome and D-genome diploids involved in ancestral allopolyploidization. To better understand the allopolyploid genome, we developed PolyCat to categorize reads according to their genome of origin based on homoeo-SNPs that differentiate the two genomes. We re-sequenced the genomes of extant diploid relatives of tetraploid cotton …

Go to article

Finnishness And Colonization In Akseli Gallen-Kallela's Representations Of Africa, Camille Kathryn Richey Jun 2015

Finnishness And Colonization In Akseli Gallen-Kallela's Representations Of Africa, Camille Kathryn Richey

Theses and Dissertations

Akseli Gallen-Kallela is often discussed as the national painter of Finland, as one who helped define Finnishness when Finland was still a colonized area of Russia. However, his trip to Africa from 1909-1911 shows where Gallen-Kallela acts as a pictorial colonizer himself, not only sympathizing with the Africans but representing them through a European cosmopolitan lens, as purer and closer to nature, but still inferior. The assumptions inherent in his representations of Africa reveal that Gallen-Kallela is not only a colonized subject but a colonizer of his own country.

Go to article

Interactions Between Social Support, Acculturationand Health Among Mexican Immigrants, Christopher D. Anderson Jun 2015

Interactions Between Social Support, Acculturationand Health Among Mexican Immigrants, Christopher D. Anderson

Theses and Dissertations

The impact of acculturation and poor social support as potential risk factors for cardiovascular and metabolic disease amongst Mexican immigrants to the United States (U.S.) is a developing area of research. One theory is that acculturation to U.S. society is negatively associated with health due to the stress of immigration as well as the less healthy diet and lifestyle in the U.S. It is also theorized that positive social support is associated with better health during immigration due to the buffering effect relationships have on stress. Despite these theories, mixed findings have been found regarding the associations between acculturation and …

Go to article

Electrophysiological Endophenotypes In Autism Spectrum Disorder: A Family Study, Ann Clawson Jun 2015

Electrophysiological Endophenotypes In Autism Spectrum Disorder: A Family Study, Ann Clawson

Theses and Dissertations

Autism spectrum disorder (ASD) is a highly heritable neurodevelopmental disorder associated with altered neural connectivity and deficits in self-monitoring, response inhibition, and planning. One promising avenue of research to improve understanding of the symptoms and heritable nature of ASD may be the identification of neural endophenotypes of ASD. The error-related negativity (ERN) and post-error positivity (Pe), scalp-recorded event-related potentials (ERPs), reflect performance monitoring processes and may qualify as candidate endophenotypes of ASD. We collected ERP and behavioral data (error rates, response times) from 18 ASD probands and their families (mother, father, sibling) and 38 control youth and their parents to …

Go to article

Will Ultrasound Performed With The Rich-Mar Autosound™ Be As Effective At Increasing Tissue Temperature As Ultrasound Performed With A Traditional Machine?, Heather Diane Black Jun 2015

Will Ultrasound Performed With The Rich-Mar Autosound™ Be As Effective At Increasing Tissue Temperature As Ultrasound Performed With A Traditional Machine?, Heather Diane Black

Theses and Dissertations

STUDY DESIGN: Randomized crossover experiment. OBJECTIVE: To determine whether the Rich-Mar AutoSound™ would be as effective as traditional ultrasound at increasing the temperature of the triceps surae muscle during a 10-min, 1 MHz, 1.0 W/cm2 ultrasound treatment. BACKGROUND: The AutoSound™ is a hands-free ultrasound device that is strapped on the body and left for the duration of the ultrasound treatment. It requires no clinician during the actual ultrasound treatment, thus freeing the clinician to perform other tasks and reducing clinician error during treatments. METHODS: 16 healthy subjects (6 males, 10 females, age = 22 ± 1.6 yrs, height = 173.2 …

Go to article

Environmental And Adaptive Buffers That Mediate The Response Of Subalpine Ecosystems To Environmental Change, Lafe G. Conner Jun 2015

Environmental And Adaptive Buffers That Mediate The Response Of Subalpine Ecosystems To Environmental Change, Lafe G. Conner

Theses and Dissertations

This document reports the results of 4 studies of subalpine ecosystem ecology, describing ways that spatial heterogeneity in soils and plant communities mediate ecosystem responses to environmental change. Ecosystem responses to environmental change are also mediated by regional climate patterns and interannual variability in weather. In the first chapter we report the results of an experiment to test for the mediating effects of associational resistance in a forest community that experienced wide-spread beetle kill. We found that Engelmann spruce were more likely to survive a beetle outbreak when growing in low densities (host dilution) and not through other types of …

Go to article

Studies On The Roles Of Translationally Recoded Proteins From Cyclooxygenase-1 And Nucleobindin Genes In Autophagy, Jonathan J. Lee Jun 2015

Studies On The Roles Of Translationally Recoded Proteins From Cyclooxygenase-1 And Nucleobindin Genes In Autophagy, Jonathan J. Lee

Theses and Dissertations

Advances in next-generation sequencing and ribosomal profiling methods highlight that the proteome is likely orders of magnitude larger than previously thought. This expansion potentially occurs through translational recoding, a process that results in the expression of multiple variations of a protein from a single messenger RNA. Our laboratory demonstrated that cyclooxygenase-3/1b (COX-3/1b), a frameshifted, intron-1-retaining, alternative splice variant from the COX-1 gene, is multiply recoded, which results in the translation of at least seven different COX-3 proteins. Two of the recoded COX-3 proteins that we identified are active prostaglandin synthases and are inhibited by non-steroidal anti-inflammatory drugs (NSAIDs). Here we …

Go to article

The Quality Of Residential Parent-Child Relationships And Its Impact On Stepfamily Experiences, Megan Urick, Gordon E. Limb Jun 2015

The Quality Of Residential Parent-Child Relationships And Its Impact On Stepfamily Experiences, Megan Urick, Gordon E. Limb

Faculty Publications

This study sought to understand the effect that residential biological parent-child relationship has on retrospective accounts of overall stepfamily experiences. Using data from the Stepfamily Experiences Project (STEP), a nationally-based quota sample, retrospective accounts of 1,593 emerging adults’ stepfamily experiences were analyzed. Results indicated that a higher quality residential biological parent-child relationship was positively and significantly correlated with a higher quality stepfamily experience. Clinicians and other social scientists need to be aware of the importance of strengthening the parent-child relationship when providing services and interventions for stepfamilies.

Go to article

Northern Range Extension Of The Figeater Beetle, Cotinis Mutabilis (Scarabaeidae: Cetoniinae), Into Nevada, Utah, And Colorado, Frank-Thorsten Krell, Jeff B. Knight, Robert Hammon, Pamela Wheeler, Jeffrey Johns Roberts, Jason R. Eckberg May 2015

Northern Range Extension Of The Figeater Beetle, Cotinis Mutabilis (Scarabaeidae: Cetoniinae), Into Nevada, Utah, And Colorado, Frank-Thorsten Krell, Jeff B. Knight, Robert Hammon, Pamela Wheeler, Jeffrey Johns Roberts, Jason R. Eckberg

Western North American Naturalist

The native Figeater Beetle, Cotinis mutabilis (Coleoptera: Scarabaeidae: Cetoniinae), is known to occur from Texas, New Mexico, Arizona, and California to northern South America. Here we present records from Nevada, where it became established in the late 1960s; from Utah, where it has been found since the late 2000s; and from Colorado, where it was found in 2012. These records indicate a recent northward range extension of the species, which circumvents the Colorado Plateau. The range extension of C. mutabilis has potential positive effects, namely the addition of a new pollinator to those areas, but also potential negative implications if …

Go to article

Assessing The Value Of Potential "Native Winners" For Restoration Of Cheatgrass-Invaded Habitat, Rebecca S. Barak, Jeremie B. Fant, Andrea T. Kramer, Krissa A. Skogen May 2015

Assessing The Value Of Potential "Native Winners" For Restoration Of Cheatgrass-Invaded Habitat, Rebecca S. Barak, Jeremie B. Fant, Andrea T. Kramer, Krissa A. Skogen

Western North American Naturalist

Native plants that are able to persist and reproduce in highly disturbed habitats (i.e., “native winners”) may be useful to include in seed mixes when restoring similarly disturbed habitat. Establishing whether these plants produce viable seeds that germinate to a high degree under appropriate conditions is a first step to determining their utility as restoration species. We identified 10 potential native winners at sites degraded by cheatgrass (Bromus tectorum), an invasive annual grass ubiquitous in the Colorado Plateau. We assessed seed viability for each species to determine its potential to reproduce within a cheatgrass-invaded site, and conducted a …

Go to article

Antioxidant Capacity Of Wyoming Big Sagebrush (Artemisia Tridentata Ssp. Wyomingensis) Varies Spatially And Is Not Related To The Presence Of A Sagebrush Dietary Specialist, Xinzhu Pu, Lisa Lam, Kristina Gehlken, Amy C. Ulappa, Janet L. Rachlow, Jennifer Sorensen Forbey May 2015

Antioxidant Capacity Of Wyoming Big Sagebrush (Artemisia Tridentata Ssp. Wyomingensis) Varies Spatially And Is Not Related To The Presence Of A Sagebrush Dietary Specialist, Xinzhu Pu, Lisa Lam, Kristina Gehlken, Amy C. Ulappa, Janet L. Rachlow, Jennifer Sorensen Forbey

Western North American Naturalist

Sagebrush (Artemisia spp.) in North America is an abundant native plant species that is ecologically and evolutionarily adapted to have a diverse array of biologically active chemicals. Several of these chemicals, specifically polyphenols, have antioxidant activity that may act as biomarkers of biotic or abiotic stress. This study investigated the spatial variation of antioxidant capacity, as well as the relationship between a mammalian herbivore and antioxidant capacity in Wyoming big sagebrush (Artemisia tridentata wyomingensis). We quantified and compared total polyphenols and antioxidant capacity of leaf extracts from sagebrush plants from different spatial scales and at different levels …

Go to article

An Assessment Of Metrics To Measure Seasonal Variation In And Grazing Effects On Riparian Plant Communities, Caroline M. Laine, Karin M. Kettenring, Brett B. Roper May 2015

An Assessment Of Metrics To Measure Seasonal Variation In And Grazing Effects On Riparian Plant Communities, Caroline M. Laine, Karin M. Kettenring, Brett B. Roper

Western North American Naturalist

Several riparian plant community and streambank metrics were evaluated in 5 streams subject to grazing on public lands in central eastern Idaho. In this study, we evaluated 3 attributes associated with the ground cover on streambanks: percent cover of live vegetation, litter, and bare ground; and we evaluated 4 attributes that describe the vegetation community: plant species richness, wetland index value, percent cover of forbs, and percent cover of graminoids. We were particularly interested in how these attributes differed between grazed and ungrazed sites, how the attributes changed through time, and ultimately how the attributes were able to discriminate the …

Go to article

End Matter, Vol. 75 No. 1 May 2015

End Matter, Vol. 75 No. 1

Western North American Naturalist

No abstract provided.

Go to article

Effects Of Ungulate Disturbance And Weather Variation On Pediocactus Winkleri: Insights From Long-Term Monitoring, Deborah J. Clark, Thomas O. Clark, Michael C. Duniway, Cody Flagg May 2015

Effects Of Ungulate Disturbance And Weather Variation On Pediocactus Winkleri: Insights From Long-Term Monitoring, Deborah J. Clark, Thomas O. Clark, Michael C. Duniway, Cody Flagg

Western North American Naturalist

Population dynamics and effects of large ungulate disturbances on Winkler cactus (Pediocactus winkleri K.D. Heil) were documented annually over a 20-year time span at one plot within Capitol Reef National Park, Utah. This cactus species was federally listed as threatened in 1998. The study began in 1995 to gain a better understanding of life history aspects and threats to this species. Data were collected annually in early spring and included diameter, condition, reproductive structures, mortality, recruitment, and disturbance by large ungulates. We used odds ratio and probability model analyses to determine effects of large ungulate trampling and weather on …

Go to article

First Prev Next Last