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

Life Sciences Commons

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

226,862 Full-Text Articles 297,165 Authors 37,629,645 Downloads 435 Institutions

All Articles in Life Sciences

Faceted Search

226,862 full-text articles. Page 1 of 6002.

Environmental Rnai Pathways In The Two-Spotted Spider Mite, Mosharrof Mondal, Jacob Peter, Obrie Scarbrough, Alex Flynt 2021 The University of Arizona

Environmental Rnai Pathways In The Two-Spotted Spider Mite, Mosharrof Mondal, Jacob Peter, Obrie Scarbrough, Alex Flynt

Faculty Publications

© 2020, The Author(s).

Background:RNA interference (RNAi) regulates gene expression in most multicellular organisms through binding of small RNA effectors to target transcripts. Exploiting this process is a popular strategy for genetic manipulation and has applications that includes arthropod pest control. RNAi technologies are dependent on delivery method with the most convenient likely being feeding, which is effective in some animals while others are insensitive. The two-spotted spider mite, Tetranychus urticae, is prime candidate for developing RNAi approaches due to frequent occurrence of conventional pesticide resistance. Using a sequencing-based approach, the fate of ingested RNAs was explored to identify ...


Understanding Students’ Global Interdependence In Science Instruction, Walter S. Smith 2021 Texas Tech University

Understanding Students’ Global Interdependence In Science Instruction, Walter S. Smith

Journal of Global Education and Research

Multiple American educational organizations such as the National Education Association, Association for Supervision and Curriculum Development, and the Council of Chief State School Officers have advocated for globalizing the K-12 curriculum. The National Science Teaching Association (NSTA) in a position statement on international education and the Next Generation Science Standards have produced goals and standards for internationalizing the science curriculum by addressing topics such as climate change, environment, and disease that cross borders. In contrast to those pronouncements on the curriculum, this article views global science education through an instructional lens that focuses on a students’ global interdependence in science ...


Meeting Minutes, June 4th, 2021, National Smokejumper Association Board of Directors 2021 Eastern Washington University

Meeting Minutes, June 4th, 2021, National Smokejumper Association Board Of Directors

National Smokejumper Association Meeting Minutes

Agenda: Call to order, review and approval of Agenda; Consent Agenda; Information Items; Investment Report; Budget; Request for NSA Endorsement of USFS Covid 19 Preparedness Letter from National Wildfire Institute to Secretary Perdue; Trails Report; Scholarship Report; Keep the Flame Legacy Jump List; Q & A on Written Report; Identifying and Recruiting New Board Members; Information and Odds and Ends; In Attendance via Zoom;


Ecology Of Estuarine Birds: Differences In Desensitization Of Year-Round And Transient Species, Sarah Thomas 2021 Coastal Carolina University

Ecology Of Estuarine Birds: Differences In Desensitization Of Year-Round And Transient Species, Sarah Thomas

Honors Theses

Huntington Beach State Park in Murrells Inlet, SC, USA is considered a “hotspot” for birds, according to the eBird database (eBird, 2020). The park is also visited by approximately 300,000 people, annually (Hobdy, 2019). The causeway at the park is an area of high human and wildlife activity. Here, the differences in desensitization, or lack thereof, of year-round and transient bird species to the stimuli of vehicles and humans were determined. Multiple surveys of the birds at Huntington Beach State Park were conducted from 22nd September, 2019 to 13th June, 2020. Desensitization was quantified by use of a range ...


The Study Of High Intensity Interval Training's Effect On Enjoyment, Keali Mari 2021 University of Nebraska at Omaha

The Study Of High Intensity Interval Training's Effect On Enjoyment, Keali Mari

Theses/Capstones/Creative Projects

This study assessed participant’s level of enjoyment in high-intensity training over moderate intensity-training. High intensity interval training is defined as short bouts of exercise performed at a near-maximal effort with rest periods or light activity in between. High intensity interval training involves repeatedly exercising at a high intensity for 30 seconds to several minutes, separated by 1-5 minutes of recovery. This type of exercise has sparked the interest of many active people due to its decreased time commitment and the benefits it elicits. The results of this study show that high intensity interval training induces a higher enjoyment rate ...


Mechanisms Of Overyielding And Coexistence In Diverse Tallgrass Prairie Communities, Leslie E. Forero 2021 Utah State University

Mechanisms Of Overyielding And Coexistence In Diverse Tallgrass Prairie Communities, Leslie E. Forero

All Graduate Theses and Dissertations

Plants compete for the same basic nutrient and water resources. According to the competitive exclusion principle, when a substantial overlap in resource pools exists, the best competitor for resources should drive all other species to extinction. The ability for plants to coexist in violation of the competitive exclusion principle is the “biodiversity paradox”. Coexistence is actually beneficial for plants: as species diversity increases, you typically see increases in plant biomass production (known as the biodiversity-productivity relationship). The mechanisms behind coexistence and the biodiversity-productivity relationship remain an ecological mystery. One hypothesis is that plants obtain water and nutrients from different places ...


Patterns Of Post-Fire Aspen Seedling Establishment, Growth, And Mortality In The Western United States, Mark Regier Kreider 2021 Utah State University

Patterns Of Post-Fire Aspen Seedling Establishment, Growth, And Mortality In The Western United States, Mark Regier Kreider

All Graduate Theses and Dissertations

Sexual seedling establishment in aspen is increasingly recognized as an important natural regeneration pathway for the species in the western U.S. However, information on seedling abundance as well as factors influencing aspen sexual regeneration is limited and frequently anecdotal, due to historical assumptions of seedling rarity as well as difficulty identifying sexual seedlings from asexual aspen sucker regeneration. This thesis contributes to the field of aspen seedling ecology in three major ways. Chapter 1 utilizes historical aspen seedling occurrences in the western U.S. and a systematic field survey of 2018 fire footprints to explore patterns and test assumptions ...


The Fate And Cycling Of Nitrogen, Phosphorous, And Trace Heavy Metals In Beaver-Altered Headwater Streams, Desneiges S. Murray 2021 Utah State University

The Fate And Cycling Of Nitrogen, Phosphorous, And Trace Heavy Metals In Beaver-Altered Headwater Streams, Desneiges S. Murray

All Graduate Theses and Dissertations

Human land-use can increase the amount of non-point source (NPS) pollution in a stream, negatively affecting ecosystem health and beneficial services provided by an ecosystem. Unfortunately, NPS pollution remains high in many waterbodies. Beaver dams may be a passive, cost-effective strategy for removing NPS pollution in headwater streams because beaver dams slow stream flow and collect sediments. Impounded sediments can change how nutrients and pollutants are cycled in a stream through multiple pathways. In the first part of our study, we investigated whether beaver activity can reduce nitrogen, phosphorous and heavy metals from otherwise traveling downstream. Results suggest beaver ponds ...


The Effects Of Trace Mineral Supplementation On Performance, Health, And Carcass Quality Of At-Risk Mineral Deficient Feedlot Cattle, Tevan J. Brady 2021 Utah State University

The Effects Of Trace Mineral Supplementation On Performance, Health, And Carcass Quality Of At-Risk Mineral Deficient Feedlot Cattle, Tevan J. Brady

All Graduate Theses and Dissertations

Morbidity in feedlot cattle due to disease is a common economical loss for feedlot producers. Utah is not typically considered a ‘feedlot state’, but there are several producers in the southern part of the state that specialize in receiving at-risk cattle. These cattle are at-risk because they are coming from areas known to be mineral deficient. Areas such as the western US, are known to be deficient in several trace minerals important in immune response. Therefore, it is critical that producers have an adequate plan to decrease the negative effects that this has on economic viability of their beef operations ...


Range-Wide Migratory Connectivity Of Painted Buntings, Andrew J. Sharp 2021 Utah State University

Range-Wide Migratory Connectivity Of Painted Buntings, Andrew J. Sharp

All Graduate Theses and Dissertations

The Painted Bunting (Passerina cirus) is a small (~16g), short/medium-distance migratory songbird that is listed as a species of conservation concern by the US Fish and Wildlife Service. Painted Buntings breed in two distinct populations, one eastern population and one interior population, separated by a 500 km gap that stretches from Mississippi to Georgia. I analyzed tracking data from 112 Painted Buntings from 11 different breeding sites to explore how individuals from different breeding sites differ in wintering location (chapter 2) and migratory timing (chapter 3). Additionally, I examined differences in migratory behavior between male and females in the ...


Greater Sage-Grouse And Community Responses To Strategies To Mitigate Environmental Resistance In An Anthropogenic Altered Sagebrush Landscape, Justin R. Small 2021 Utah State University

Greater Sage-Grouse And Community Responses To Strategies To Mitigate Environmental Resistance In An Anthropogenic Altered Sagebrush Landscape, Justin R. Small

All Graduate Theses and Dissertations

Sagebrush (Artemisia spp.) ecosystems are diverse habitats found throughout western North America. Anthropogenic disturbances has resulted in the loss of over half of the sagebrush ecosystems impacting sagebrush obligate species such as sage-grouse (Centrocercus spp.). Federal, state, and private land managers have implemented landscape scale mechanical pinyon (Pinus spp.) and juniper (Juniperus spp.; conifer) removal projects in an effort to restore functioning sagebrush communities to benefit sage-grouse. However, few studies have investigated the potential for using large-scale conifer treatments to mitigate factors impeding sage-grouse seasonal movements and space-use in anthropogenic altered landscapes.

To address this management need, I analyzed pre- ...


Bighorn Sheep Demographics Following Pneumonia Die-Off Events, Kylie Sinclair 2021 Utah State University

Bighorn Sheep Demographics Following Pneumonia Die-Off Events, Kylie Sinclair

All Graduate Theses and Dissertations

Bighorn sheep populations across the Intermountain West are subject to disease pressure from the respiratory bacteria Mycoplasma ovipneumoniae. Although the effects of M. ovipneumoniae-associated disease die-offs are well documented, less is known about the factors driving long-term differences in post-die-off population responses. While many herds experience years to decades in which recruitment is less than 20 lambs per 100 ewes, some herds’ lamb survival rates are able to rebound rapidly following die-off events. The reason why these herds recover quickly while others do not is currently unknown. Here, we assess the roles environmental, demographic, and pathogen-associated factors could play ...


Patterns Of Use In A Division I University Fueling Station Before And After Implementing A Nutrition Education Intervention, Cady L. Peters 2021 Utah State University

Patterns Of Use In A Division I University Fueling Station Before And After Implementing A Nutrition Education Intervention, Cady L. Peters

All Graduate Theses and Dissertations

Well-timed nutrition strategies are a well-established way to improve athletic performance and minimize recovery time, however, athletes often do not prioritize nutrition as a strategy to gain an edge over their competitors. Even with a resource such as a Fueling Station, which provides athletes with nutrient dense, convenient pre- and post-workout snacks, athletes still struggle understanding which foods are an appropriate choice for their purpose of eating.

The purpose of this research was to examine the changes in the appropriateness of the athlete’s meal choices at the Fueling Station based on their macronutrient distribution and timing of workout or ...


Investigation Of Methionine And Lysine Derivatives As A Source Of Rumen-Protected Amino Acids For Lactating Dairy Cows, Mark Avila Fagundes 2021 Utah State University

Investigation Of Methionine And Lysine Derivatives As A Source Of Rumen-Protected Amino Acids For Lactating Dairy Cows, Mark Avila Fagundes

All Graduate Theses and Dissertations

Cows have a protein requirement for growth, maintenance, and lactation. In order to meet those protein requirements, dairy farmers can supplement or feed cattle with specific amino acids, the building blocks that make-up protein. However, in order for the amino acid product to be effective it must avoid degradation in the rumen and be delivered in the small intestine for absorption. Lysine and methionine have traditionally been recognized as the most limiting amino acids for lactating dairy cows. Therefore, nutrition companies have focused on finding ways to encapsulate or protect lysine and methionine from rumen microbes. The N-acetyl-L-methionine and N-acetyl-L-lysine ...


Fatty Acid Composition Of Forages And Their Effect On The Fatty Acid Composition In Beef Cattle, Britney G. Allen 2021 Utah State University

Fatty Acid Composition Of Forages And Their Effect On The Fatty Acid Composition In Beef Cattle, Britney G. Allen

All Graduate Theses and Dissertations

This study focused on how diet changes the rumen microbiome in the cattle and the effects of that on the long chain fatty acids (LCFA) by microbes in the rumen, and on the short chain fatty acids (SCFA) these microbes produce from feed carbohydrates like fiber and starch. The abundance of bacteria belonging to the phyla Tenericutes and Proteobacteria increased in response to high-fiber or high-starch diets, respectively. The production of two SCFA was positively correlated with the presence of increased Tenericutes (acetate) and Proteobacteria (propionate). A greater acetate to propionate ratio is associated with elevated production of enteric methane ...


Niche Differentiation Of Bacteria And Fungi In Carbon And Nitrogen Cycling Of Different Habitats In A Temperate Coniferous Forest: A Metaproteomic Approach, Robert Starke, Rubén López Mondéjar, Zander Rainer Human, Diana Navrátilová, Martina Štursová, Tomáš Větrovský, Heather M. Olson, Daniel J. Orton, Stephen J. Callister, Mary S. Lipton, Adina Howe, Lee Ann McCue, Christa Pennacchio, Igor Grigoriev, Petr Baldrian 2021 Institute of Microbiology of the Czech Academy of Sciences

Niche Differentiation Of Bacteria And Fungi In Carbon And Nitrogen Cycling Of Different Habitats In A Temperate Coniferous Forest: A Metaproteomic Approach, Robert Starke, Rubén López Mondéjar, Zander Rainer Human, Diana Navrátilová, Martina Štursová, Tomáš Větrovský, Heather M. Olson, Daniel J. Orton, Stephen J. Callister, Mary S. Lipton, Adina Howe, Lee Ann Mccue, Christa Pennacchio, Igor Grigoriev, Petr Baldrian

Agricultural and Biosystems Engineering Publications

Temperate coniferous forests sustain the highest levels of biomass of all terrestrial ecosystems and belong to the major carbon sinks on Earth. However, the community composition and its functional diversity depending on the habitat have yet to be unveiled. Here, we analyzed the proteomes from litter, plant roots, rhizosphere, and bulk soil in a temperate coniferous forest at two time points to improve the understanding of the interplay between bacterial and eukaryotic communities in different habitats. Our metaproteomic approach yielded a total of 139,127 proteins that allowed to differentiate the contribution of microbial taxa to protein expression as well ...


Laboratory Techniques In Public Health: Bi-520 Introduction To Public Health Lab Manual, Anuradha Srivastava 2021 CUNY Queensborough Community College

Laboratory Techniques In Public Health: Bi-520 Introduction To Public Health Lab Manual, Anuradha Srivastava

Open Educational Resources

This laboratory manual for a foundations course Public Health is unique in the sense that very rarely, a foundations course in the field has a lab component offered with the lecture. This lab manual provides basic laboratory exercises that could be useful to introduce undergraduate students to the basics of public health laboratory practices.


Effects Of Varying Heat Indexes On Habitat Utilization And Behavior On Captive Red-Ruffed Lemurs (Varecia Rubra), Jeffrey Gammon 2021 University of Central Florida

Effects Of Varying Heat Indexes On Habitat Utilization And Behavior On Captive Red-Ruffed Lemurs (Varecia Rubra), Jeffrey Gammon

The Pegasus Review: UCF Undergraduate Research Journal

The two captive red-ruffed lemurs (Varecia rubra) at the Central Florida Zoo experienced a more temperate climate and utilized a differing habitat than they would in their native range, Madagascar. Proper management of the species in captivity is crucial for its long-term survival as they are critically endangered. Over a four month period, heat index temperature, lemur behavior, and habitat utilization data were collected via an instantaneous scan sample. Variables were analyzed to characterize how variations in heat index alter habitat utilization and behavior of the captive lemurs. As the heat index increased, habitat use became more restricted with a ...


Scc-Civic-Pg Track B: Data And Tools To Build Resilience In Western Gateway And Natural Amenity Region Communities, Jordan Smith 2021 Utah State University

Scc-Civic-Pg Track B: Data And Tools To Build Resilience In Western Gateway And Natural Amenity Region Communities, Jordan Smith

Funded Research Records

No abstract provided.


Community Supported Enterprises – Preparing For The Future, Charlotte Narjes 2021 University of Nebraska-Lincoln

Community Supported Enterprises – Preparing For The Future, Charlotte Narjes

Cornhusker Economics

The Bayard Grocery store made headline news in Nebraska the end of January with the announcement of its upcoming closure. Unfortunately, a grocery store closing is not uncommon in Nebraska or across the United States. A North Dakota study from the state’s association of rural electric cooperatives in 2017 found that in communities with 2,100 people or fewer, there are 98 full-service grocery stores, down from 137 in 2014. In addition, A PEW Trusts article in October 2019, further addresses the nationwide challenge of rural grocery store closures. Challenges include decreased population, competition from superstores (i.e., Walmart ...


Digital Commons powered by bepress