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Browsing Biology by Title
Now showing items 1-20 of 143
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A biogeographic perspective on the evolution of fire syndromes in pine trees (Pinus: Pinaceae)
(2018)Our goals were to explore the relationship between biogeography and the evolution of fire-adaptive syndromes in the genus Pinus. We used a previously published time-calibrated phylogeny and conducted ancestral trait ... -
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A diamond in the rough desert shrublands of the Great Basin in the Western United States: A new cryptic toad species (Amphibia: Bufonidae: Bufo (Anaxyrus)) discovered in Northern Nevada
(2017)We describe a new species of toad from the Great Basin region of northern Nevada belonging to the Bufo (Anaxyrus) boreas species complex. This cryptic species was detected through genetic analyses of toad populations sampled ... -
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A mast-seeding desert shrub regulates population dynamics and behavior of its heteromyid dispersers
(2016)Granivorous rodent populations in deserts are primarily regulated through precipitation-driven resource pulses rather than pulses associated with mast-seeding, a pattern more common in mesic habitats. We studied heteromyid ... -
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A neonicotinoid pesticide impairs foraging, but not learning, in free-flying bumblebees
(2019)Neonicotinoids are widely-used pesticides implicated in the decline of bees, known to have sub-lethal effects on bees' foraging and colony performance. One proposed mechanism for these negative effects is impairment to ... -
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A Rare Case of Carotid Web Presenting with Ischemic Stroke in a Young Woman and a Brief Review of the Literature
(2018)Carotid web is a radiological description of a shelf-like intraluminal filling defect in the carotid bulb. It is histologically defined as atypical fibromuscular dysplasia (FMD), with abnormal fibrosis and smooth muscle ... -
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A Trade-Off Between Natural and Acquired Antibody Production in a Reptile: Implications for Long-Term Resistance to Disease
(11/15/2012)Skip to Next Section Vertebrate immune systems are understood to be complex and dynamic, with trade-offs among different physiological components (e.g., innate and adaptive immunity) within individuals and among taxonomic ... -
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Absence of population structure across elevational gradients despite large phenotypic variation in mountain chickadees (Poecile gambeli)
(2017)Montane habitats are characterized by predictably rapid heterogeneity along elevational gradients and are useful for investigating the consequences of environmental heterogeneity for local adaptation and population genetic ... -
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Across Multiple Species, Phytochemical Diversity and Herbivore Diet Breadth Have Cascading Effects on Herbivore Immunity and Parasitism in a Tropical Model System
(2018)Terrestrial tri-trophic interactions account for a large part of biodiversity, with approximately 75% represented in plant-insect-parasitoid interactions. Herbivore diet breadth is an important factor mediating these ... -
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Allelopathic Characteristics of Artemisia tridentata and Purshia tridentata and Implications for Invasive Species Management
(Associate Students of the University of Nevada (ASUN), 10/25/2014)Big sagebrush (Artemisia tridentata) and antelope bitterbrush (Purshia tridentata) are native species to the sagebrush ecosystem of northern Nevada. Both of these species exhibit allelopathic effects, whereby they produce ... -
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An ecoimmunological approach to disease in tortoises reveals the importance of lymphocytes
(2018)We quantified the severity of upper respiratory tract disease (URTD) and immunological metrics (differential white blood cell counts and bacteria-killing ability of blood plasma) in relation to climatic variables in 20 ... -
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An Ecological Function Approach to Managing Harmful Cyanobacteria in Three Oregon Lakes: Beyond Water Quality Advisories and Total Maximum Daily Loads (TMDLs)
(2019)The Oregon Department of Environmental Quality (ODEQ) uses Total Maximum Daily Load (TMDL) calculations, and the associated regulatory process, to manage harmful cyanobacterial blooms (CyanoHABs) attributable to non-point ... -
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Analysis of Limiting Factors Across the Life Cycle of Delta Smelt (Hypomesus transpacificus)
(2018)We developed a mechanistic life-cycle model derived from the elicitation of multiple factors influencing the success of individual life-stages of the imperiled delta smelt (Hypomesus transpacificus). We discuss the relevance ... -
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Arabidopsis Heat Stress-Induced Proteins Are Enriched in Electrostatically Charged Amino Acids and Intrinsically Disordered Regions
(2018)Comparison of the proteins of thermophilic, mesophilic, and psychrophilic prokaryotes has revealed several features characteristic to proteins adapted to high temperatures, which increase their thermostability. These ... -
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Artificial Light at Night Reduces Daily Energy Expenditure in Breeding Great Tits (Parus major)d
(2017)The ecological impact of artificial light at night (ALAN) is an increasingly recognized process that accompanies expanding urbanization. Yet, we have limited knowledge on the impact of ALAN on wild species, and on the ... -
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Ascending midbrain dopaminergic axons require descending GAD65 axon fascicles for normal pathfinding
(2014)The Nigrostriatal pathway (NSP) is formed by dopaminergic axons that project from the ventral midbrain to the dorsolateral striatum as part of the medial forebrain bundle. Previous studies have implicated chemotropic ... -
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Assessment of Longitudinal Gradients in Nematode Communities in the Deep Northern Gulf of Mexico and Concordance with Benthic Taxa
(6/14/2012)Meiobenthic nematode assemblages were examined at 16 stations along two transects on the eastern and western boundaries of the deep northern Gulf of Mexico (dNGOM) at depths of 212–3000 m. The highest abundance (297 ... -
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Behavior Responses to Chemical and Optogenetic Stimuli in Drosophila Larvae
(2018)An animal's ability to navigate an olfactory environment is critically dependent on the activities of its first-order olfactory receptor neurons (ORNs). While considerable research has focused on ORN responses to odorants, ... -
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Benthic protists and fungi of Mediterranean deep hypsersaline anoxic basin redoxcline sediments
(2014)Some of the most extreme marine habitats known are the Mediterranean Deep Hypersaline Anoxic Basins (DHABs; water depth ~3500m). Brines of DHABs are nearly saturated with salt, leading many to suspect they are uninhabitable ... -
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Blocking Apoptotic Signaling Rescues Axon Guidance in Netrin Mutants
(3/28/2013)Summary Netrins are guidance cues that form gradients to guide growing axons. We uncover a mechanism for axon guidance by demonstrating that axons can accurately navigate in the absence of a Netrin gradient if apoptotic ... -
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Cell-Autonomous and Non-Cell-Autonomous Regulation of a Feeding State-Dependent Chemoreceptor Gene via MEF-2 and bHLH Transcription Factors
(2016)Food and feeding-state dependent changes in chemoreceptor gene expression may allow Caenorhabditis elegans to modify their chemosensory behavior, but the mechanisms essential for these expression changes remain poorly ...