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Articles 2401 - 2430 of 25853
Full-Text Articles in Entire DC Network
Influence Of Nonnative And Native Ungulate Biomass And Seasonal Precipitation On The Vegetation Production In A Great Basin Ecosystem, Linda C. Zeigenfuss, Kathryn A. Schoenecker, Jason I. Ransom, Drew A. Ignizio, Tracy Mask
Influence Of Nonnative And Native Ungulate Biomass And Seasonal Precipitation On The Vegetation Production In A Great Basin Ecosystem, Linda C. Zeigenfuss, Kathryn A. Schoenecker, Jason I. Ransom, Drew A. Ignizio, Tracy Mask
Western North American Naturalist
The negative effects of equid grazers in semi-arid ecosystems of the American West has been considered to be disproportionate to the influence of native ungulates in these systems because of their large body size, hoof shape, and short history on the landscape relative to native grazers. Tools which can model the degree of influence of various grazers in an ecosystem and separate these effects from those caused by other variables (climate, anthropomorphic disturbances) can be useful to managers in determining location of non-native grazer impacts and assessing the effect of management actions targeted at different grazer populations. We used remotely …
Estimating The Ages Of Mountain Sucker Catostomus Platyrhynchus From The Black Hills: Precision, Maturation, And Growth, Jason J. Breeggemann, Cari-Ann Hayer, Jacob Krause, Luke D. Schultz, Katie N. Bertrand, Brian D. S. Graeb
Estimating The Ages Of Mountain Sucker Catostomus Platyrhynchus From The Black Hills: Precision, Maturation, And Growth, Jason J. Breeggemann, Cari-Ann Hayer, Jacob Krause, Luke D. Schultz, Katie N. Bertrand, Brian D. S. Graeb
Western North American Naturalist
Mountain Sucker Catostomus platyrhynchus is considered secure across its range, it has been declining in parts of its range, and is listed as a species of greatest conservation need in South Dakota. To our knowledge, no research has identified which calcified structure yields the most precise age estimates for Mountain Sucker and little is known about Mountain Sucker population dynamics. We compared scales, sectioned fin rays, whole otoliths, and polished otoliths to identify which structure provided the most precise age estimates for Mountain Sucker in the Black Hills of South Dakota. Additionally, we quantified recruitment, growth, age and size at …
Home-Range Size And Subadult Dispersal Of Black Bears In The Cascade Range Of Western Oregon, Dave Immell, Dewaine H. Jackson, Margaret C. Boulay
Home-Range Size And Subadult Dispersal Of Black Bears In The Cascade Range Of Western Oregon, Dave Immell, Dewaine H. Jackson, Margaret C. Boulay
Western North American Naturalist
Knowledge of home range size and subadult dispersal activity of North American black bears is essential for understanding the complexity of how bears interact within populations and the environment. During 1993-98, we monitored 96 radiocollared black bears (Ursus americanus) in the Cascade Range of western Oregon to estimate home range and dispersal movements. Composite fixed-kernel home ranges were calculated for 37 bears. Mean home range size differed between sexes (189.7 km2 for males and 33.6 km2 for females); however, there was no difference between subadult and adult male or subadult and adult female mean home range …
Rediscovered Populations Of The Idaho Point-Headed Grasshopper, Acrolophitus Pulchellus (Bruner), 1890 (Orthoptera: Acrididae), Beth A. Waterbury
Rediscovered Populations Of The Idaho Point-Headed Grasshopper, Acrolophitus Pulchellus (Bruner), 1890 (Orthoptera: Acrididae), Beth A. Waterbury
Western North American Naturalist
The Idaho point-headed grasshopper, Acrolophitus pulchellus, is a rare endemic of the Sinks Drainages of east-central Idaho. Past collections were infrequent and found few specimens. Searches in 1993 failed to find specimens, leading to speculaton that A. pulchellus was extinct. I report rediscovered populations of A. pulchellus based on 55 capture records (10 collected); describe distribution, habitat, morphological, and life history information; and present the first photos of live adult specimens.
New Vascular Plant Floristic Records For The Dakotas, Karen Meyer Walker, Ashley Pemberton, Tyler Grassrope, Kayla Gravatt, Sunshine Claymore, Wendy L. Applequist
New Vascular Plant Floristic Records For The Dakotas, Karen Meyer Walker, Ashley Pemberton, Tyler Grassrope, Kayla Gravatt, Sunshine Claymore, Wendy L. Applequist
Western North American Naturalist
Recent collections of vascular plants on the Crow Creek Indian Reservation in central South Dakota include 64 new county records for Hughes County, 72 for Buffalo County, and 1 for Hyde County. Additionally, 2 new county records are reported for Sioux County in southern North Dakota.
Las recientes colectas de plantas vasculares en la Reserva Indie Crow Creek en el centro de Dakota del Sur incluyen: 64 nuevos registros en el Condado Hughes, 72 en el Condado Buffalo y uno en el Condado Hyde. Además, se reportaron dos nuevos registros en al Condado Sioux, en el sur de Dakota del …
New Flea (Siphonaptera) Record For Heermann's Kangaroo Rat (Dipodomys Heermanni), San Luis Obispo County, California, Howard O. Clark Jr., Helen K. Pigage
New Flea (Siphonaptera) Record For Heermann's Kangaroo Rat (Dipodomys Heermanni), San Luis Obispo County, California, Howard O. Clark Jr., Helen K. Pigage
Western North American Naturalist
Three Heermann’s kangaroo rats (Dipodomys heermanni), from San Luis Obispo County, California, were examined for ectoparasites. Two species of flea were found,Meringis californicus and Hoplopsyllus anomalus. Occurrence of these two species onDipodomys heermanni has not been reported before and represents new host records.
Demographic Monitoring And Population Viability Analysis Of Two Rare Beardtongues From The Uinta Basin, Rebecca M. Mccaffery, Rita Reisor, Kathryn Irvine, Jessi Brunson
Demographic Monitoring And Population Viability Analysis Of Two Rare Beardtongues From The Uinta Basin, Rebecca M. Mccaffery, Rita Reisor, Kathryn Irvine, Jessi Brunson
Western North American Naturalist
Energy development, in combination with other environmental stressors, poses a persistent threat to rare species endemic to the energy-producing regions of the Western United States. Demographic analyses of monitored populations can provide key information on the natural dynamics of threatened plant and animal populations, and how they might be affected by ongoing and future development. In the Uinta Basin in Utah and Colorado, Graham’s beardtongue (Penstemon grahamii) and White River beardtongue (Penstemon scariosus var. albifluvis) are two rare endemic wildflowers that persist on oil shale habitats heavily impacted by current energy exploration and development, and slated …
Design Of Randomized Experiments In Networks, Dylan Walker, Lev Muchnik
Design Of Randomized Experiments In Networks, Dylan Walker, Lev Muchnik
Business Faculty Articles and Research
Over the last decade, the emergence of pervasive online and digitally enabled environments has created a rich source of detailed data on human behavior. Yet, the promise of big data has recently come under fire for its inability to separate correlation from causation-to derive actionable insights and yield effective policies. Fortunately, the same online platforms on which we interact on a day-to-day basis permit experimentation at large scales, ushering in a new movement toward big experiments. Randomized controlled trials are the heart of the scientific method and when designed correctly provide clean causal inferences that are robust and reproducible. However, …
The Plecoptera And Trichoptera Of The Arctic North Slope Of Alaska, Michael R. Kendrick, Alexander D. Huryn
The Plecoptera And Trichoptera Of The Arctic North Slope Of Alaska, Michael R. Kendrick, Alexander D. Huryn
Western North American Naturalist
The Arctic is currently experiencing changes in climate more rapid than any other biome. This warming trend has resulted in significant abiotic changes to the seasonal patterns of freshwater ecosystems. Thorough inventories of freshwater insect communities are required to provide benchmarks allowing for the detection of range shifts in response to a warming climate. While statewide studies have been conducted for Trichoptera and Plecoptera, species accounts for these orders in Arctic Alaska have received relatively little attention. We surveyed Plecoptera and Trichoptera of Alaska’s Arctic North Slope at a variety of habitat types over an 11 year period. We document …
Reproduction And Pollination Of The Endangered Dwarf Bear-Poppy Arctomecon Humilis (Papaveraceae) Across A Quarter Century: Unraveling Of A Pollination Web?, Vincent J. Tepedino, John Mull, Terry L. Griswold, Gerald Bryant
Reproduction And Pollination Of The Endangered Dwarf Bear-Poppy Arctomecon Humilis (Papaveraceae) Across A Quarter Century: Unraveling Of A Pollination Web?, Vincent J. Tepedino, John Mull, Terry L. Griswold, Gerald Bryant
Western North American Naturalist
Arctomecon humilis, a rare gypsophile of the extreme northeastern Mojave Desert, is restricted to a few isolated populations (occurrences) in Washington Co, Utah (USA). At several points in the past quarter century, we have studied the breeding system and reproductive success of this endangered species, recorded its pollinators and tested the feasibility of human-assisted gene flow by conducting reciprocal crosses between two isolated occurrences approximately 4 km apart. We found A. humilis to possess a mixed breeding system in the occurrence studied (Beehive Dome in 1988); some plants exhibited self-compatibility but fruit/flowers and seeds/fruit were significantly lower in pollinator-effected …
Plant Community Changes Following Closure Of Artesian Wells In Great Sand Dunes National Park, Colorado, Sarah J. Garza, Gillian Bowser, Kenneth R. Wilson
Plant Community Changes Following Closure Of Artesian Wells In Great Sand Dunes National Park, Colorado, Sarah J. Garza, Gillian Bowser, Kenneth R. Wilson
Western North American Naturalist
Artificial artesian wells have existed in the San Luis Valley of south central Colorado for over 100 years and are an important source of water for livestock and wildlife. When Great Sand Dunes National Park and Preserve (GRSA) expanded its boundaries in 2000, 10 of these wells were within the new park boundary. In 2010, the National Park Service capped these wells to restore the surrounding habitat to a more natural state, which was severely disturbed from cattle and wildlife trampling. To study changes after well capping, we compared the plant communities in 2011 and 2012 and measured plant cover, …
On The Frontlines Of Ebola, Unh Communications And Public Affairs
On The Frontlines Of Ebola, Unh Communications And Public Affairs
UNH Today Archive
No abstract provided.
Executive Committee - Agenda, 11/04/2014, Academic Senate
Executive Committee - Agenda, 11/04/2014, Academic Senate
Academic Senate Agendas
No abstract provided.
Volume 112, Number 9 - Tuesday, November 4, 2014, Saint Mary's College Of California
Volume 112, Number 9 - Tuesday, November 4, 2014, Saint Mary's College Of California
The Collegian
No abstract provided.
Population Genetic Structure Of The Baird's Pocket Gopher, Geomys Breviceps, In Eastern Texas, Sarah R. Welborn, Jessica E. Light
Population Genetic Structure Of The Baird's Pocket Gopher, Geomys Breviceps, In Eastern Texas, Sarah R. Welborn, Jessica E. Light
Western North American Naturalist
The Baird’s pocket gopher (Geomys breviceps) is a solitary, fossorial rodent found throughout areas of Texas, Arkansas, Oklahoma, and Louisiana. These rodents are highly modified morphologically for an underground lifestyle, often resulting in limited vagility and isolated populations. Despite these unique characteristics, little is known about the population genetics of pocket gophers. We used mitochondrial and microsatellite data and performed a series of population genetic analyses to better understand the population structure and gene flow among a series of G. brevicepslocalities. Population genetic analyses supported high levels of gene flow among nearby localities (within 2 km of …
A Sensitive Question: Asking About Race In A Research Interview, Laura O'Hare
A Sensitive Question: Asking About Race In A Research Interview, Laura O'Hare
The Qualitative Report
Conversations are significant, but often overlooked cultural sites where attitudes, beliefs, and values about race are both reified and challenged. As such, these sites deserve increased scholarly attention (Allen, 2007). We employed Brown and Levinson’s Politeness Theory as a framework to examine the discursive strategies used by 11 interviewers in a research context as they asked 115 patient participants (taking part in a larger study of patients at a community-based family medicine residency clinic) to identify their race, as well as to identify the discursive strategies used by patient participants who answered this question. Our analysis revealed that in their …
Use Of A Towed Camera System For Estimating Reef Fish Populations Densities On The West Florida Shelf, Sarah Elizabeth Grasty
Use Of A Towed Camera System For Estimating Reef Fish Populations Densities On The West Florida Shelf, Sarah Elizabeth Grasty
USF Tampa Graduate Theses and Dissertations
Reef fish species tend to reside over high relief habitat which makes them difficult to sample with traditional gears such as nets and trawls. Therefore, implementing and understanding the strengths and weaknesses of new approaches which incorporate acoustic and optical methods has become a priority for reef fish stock assessment. Beginning in June of 2013, a towed camera system known as the Camera-Based Assessment Survey System (C-BASS) has been used to visualize over 500 kilometers of transect and record more than 80 hours of video over several habitats in the Gulf of Mexico. Surveys have been completed on the West …
Phenyl Functionalized Sol-Gel Silica Sorbent For Capillary Microextraction And Chromia-Based Sol-Gel Ucon Stationary Phase For Capillary Gas Chromatography, Michael M. Mclean
Phenyl Functionalized Sol-Gel Silica Sorbent For Capillary Microextraction And Chromia-Based Sol-Gel Ucon Stationary Phase For Capillary Gas Chromatography, Michael M. Mclean
USF Tampa Graduate Theses and Dissertations
The first chapter of this thesis presents an introduction to sol-gel methodology whose usefulness as a synthetic route will be demonstrated with two applications in chromatography. The first application involves the fabrication of a capillary micro-extraction (CME) device by coating a phenyl functionalized extracting phase on the inner surface of a fused silica capillary for analyte pre-concentration. The device was coupled on-line to a RP-HPLC system and practicality was demonstrated using allergens as target analytes. The allergens chosen as model analytes are typically found in fragrance products and food. Most of the 26 fragrance allergens that are monitored by various …
Cloning And Characterization Of Il-1Β, Il-8, Il-10, And Tnfα From Golden Tilefish (Lopholatilus Chamaeleonticeps) And Red Snapper (Lutjanus Campechanus), Kristina L. Deak
Cloning And Characterization Of Il-1Β, Il-8, Il-10, And Tnfα From Golden Tilefish (Lopholatilus Chamaeleonticeps) And Red Snapper (Lutjanus Campechanus), Kristina L. Deak
USF Tampa Graduate Theses and Dissertations
Cytokines are pleiotropic and redundant signaling molecules that govern the inflammatory response and immunity, a critical ecological parameter for organism success and population growth. Produced at the site of injury or pathogen intrusion by a variety of cell types, cytokines mediate cell-signaling in either an autocrine or paracrine manner. The type and magnitude of the cytokine milieu produced subsequently dictates the strength and form of immune response. As the most diverse vertebrate group, with a high sensitivity to contaminants, fish represent an important foci for the evaluation of immune system evolution, function, and alteration upon toxicant exposure. While many cytokines …
Love And (M)Other (Im)Possibilities, Summer Renee Cunningham
Love And (M)Other (Im)Possibilities, Summer Renee Cunningham
USF Tampa Graduate Theses and Dissertations
This dissertation is a performative interrogation of the disagreement and (dis)interest, communication issues, surrounding motherhood in contemporary U.S. culture. Textual analysis of Mary Kelly's Post-Partum Document (PPD) plays a key role in my inquiry. I juxtapose documentation from my lived experiences and academic projects with Kelly's work to build upon the themes and ideas introduced throughout PPD. This project is guided by the concepts love and (im)possibility, and I will argue that, together, they are central to understanding mothering/caregiving as a site of communication inquiry. Love and (im)possibility are inherent to both mothering and communication, but they also are essential …
Quantification Of Protein Adhesion Strength To Surface Attached Poly (N- Isopropylacrylamide) Networks By Hydrodynamic Detachment Shear Stresses, Gulnur Sanden
USF Tampa Graduate Theses and Dissertations
Stimuli responsive coatings offer a versatile method by which to manipulate interfacial interactions of proteins in a desired way. However, there exists little guidance as to how the structure of a responsive polymer coating influences adsorption of proteins. In this dissertation, the adsorption behavior of immuglobulin G (IgG) on poly (N-isopropylacryamide) (PNIPAAm) hydrogel coatings was investigated as a function of film thickness. PNIPAAm exhibits a hydrophilic to hydrophobic transition above a critical temperature of ~32°C in aqueous solutions. In this research, through the use of quartz crystal microbalance with dissipation (QCM-D) it was observed that the adsorption was thickness dependent …
The Breeding Biology Of Pheasant Tailed Jacana, Hydrophasianus Chirurgus In Wetlands Of Pakistan, Zahid Iqbal Khan, Mohammad Shareef Mughal
The Breeding Biology Of Pheasant Tailed Jacana, Hydrophasianus Chirurgus In Wetlands Of Pakistan, Zahid Iqbal Khan, Mohammad Shareef Mughal
Journal of Bioresource Management
Pheasant Tailed Jacana, Hydrophasianus chirurgus is an attractive bird sustaining its presence in wetlands of Pakistan during summers. To facilitate conservation, the breeding biology of specific birds was recorded during 2004-07. According to the observations, the clutch size remains between 1-4 eggs, and most of the fertile females laid 2 consecutive clutches to hand over to two different males for hatching and chick rearing. Incubation calculated between 25-29 days hatchability was found to be around 80%. Defensive responses, egg laying, and chick care were observed to better understand the general behaviour of the species.
Biodiversity Assessment And Its Effect On The Environment Of Shakarparian Forest, Inayat Ullah Malik, Abul Hasan Faiz, Fakhar -I- Abbas
Biodiversity Assessment And Its Effect On The Environment Of Shakarparian Forest, Inayat Ullah Malik, Abul Hasan Faiz, Fakhar -I- Abbas
Journal of Bioresource Management
Shakarparian is known for its scenic beauty and wilderness and has a significant recreational value. It is a part of Margalla Hills National Park (MHNP), Islamabad and can be a good recourse to conduct various environmental studies. This study was aimed to explore the overall biodiversity of Shakarparian forest in terms of flora and its associated fauna. Phytosociological survey was carried out in order to identify the existing plant communities. The plant associations were then correlated to the existing fauna of the area. The results will provide the baseline data to support further studies on biodiversity analysis of ecologically rich …
A Checklist Of Birds Of Prey Of Rawalpindi, Islamabad And Adjacent Areas, Nadia Yousaf, Madeeha Manzoor
A Checklist Of Birds Of Prey Of Rawalpindi, Islamabad And Adjacent Areas, Nadia Yousaf, Madeeha Manzoor
Journal of Bioresource Management
Wildlife is declining worldwide due to loss of habitat, pollution, introduction of exotic species, climatic changes etc. Birds of prey are believed to be rapidly declining in Pakistan though no reliable recent data is available and the available literature suggests its previous wide distribution throughout Pakistan. This current study was carried out in the Rawalpindi, Islamabad and some adjacent areas (latitude N 33o27.34-33o48.05 longitude E 72o59.34-73o27.30) to make a checklist of previously and newly existing prey birds as well as to study their general behaviors and biology. Targeted areas were studied at …
Review: Role Of Syrphids (Diptera: Syrphidae) As Biotic Agents And Pollinators In Pakistan, Mohammad Irshad
Review: Role Of Syrphids (Diptera: Syrphidae) As Biotic Agents And Pollinators In Pakistan, Mohammad Irshad
Journal of Bioresource Management
The agriculture sector is important in the overall economy of Pakistan. There are many limiting factors in crop production. The two important factors are pest damage and pollination in addition to many others. Pest damage remained a serious problem since the dawn of human civilization. With the advancement of knowledge regarding safety of environment, pests are now tackled through Integrated Pest Management (IPM) techniques. In IPM, biological control through use of natural enemies is quite significant and the favored approach. Pollination is an essential ecosystem service. Effective pollination results in increased crop production, quality improvement and more seed production. One …
Toxic Metal Effect On Filamentous Fungi Isolated From The Contaminated Soil Of Multan And Gujranwala, Anam Rasool, Shazia Irum
Toxic Metal Effect On Filamentous Fungi Isolated From The Contaminated Soil Of Multan And Gujranwala, Anam Rasool, Shazia Irum
Journal of Bioresource Management
Considering the importance of filamentous fungi for bioremediation of wastewater and contaminated soils, this study was planned to investigate the metal tolerance potential of indigenous filamentous fungi. Certain metals are important to biological actions. However all metals, whether essential or inessential will show toxicity at certain levels. During 2012 total 17 fungi were isolated and preserved from contaminated peri-urban agricultural areas of Multan and Gujranwala for further detail investigation of heavy metal tolerance. Aspergillus niger, Aspergillus fumigatus and Aspergillus flavus isolated from both soil and water samples while Aspergillus terreus and Penicillium sp were only isolated from soil samples …
Anti-Cancer Mechanisms Of The Natural Plant Derived Compound, Withaferin A In Her-2/Neu Breast Cancer, Annalise Barnette
Anti-Cancer Mechanisms Of The Natural Plant Derived Compound, Withaferin A In Her-2/Neu Breast Cancer, Annalise Barnette
Open Access Dissertations
Overexpression of the HER-2/neu oncoprotein occurs in approximately 30% of breast cancer cases and is associated with a more aggressive tumor phenotype and poor prognosis for patients. Current treatment strategies are effective in a subset of patients however a significant number of patients relapse due to acquired mechanisms of resistance to current therapy. Alternative approaches, that utilize multiple modes of action, are therefore necessary to combat this severe form of breast cancer. Natural compounds are notorious for their multiple mechanisms of action, which make them ideal therapeutics for complex diseases such as cancer. Withaferin A (WA) is a purified product …