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Browsing Biology by Title
Now showing items 65-84 of 207
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Effects of the mid-Miocene Climatic Optimum on ecosystem structure and plant-animal interactions: a phytolith and stable isotope perspective
The mid-Miocene Climatic Optimum (MMCO, 17–14.75 Ma) is one of Earth’s most recent, prolonged global warming events that is thought to have promoted ecological change across the globe. Although there is general agreement ... -
Elevated maternal corticosterone alters offspring development, physiology, and behavior in quail
(2004)Within the last decade, a large body of literature has accumulated documenting the deposition of maternal androgens into egg yolk and their consequences for offspring. However, little is known about the transfer of maternal ... -
Elevated temperature and ocean acidification alter mechanics of mussel attachment
Global climate change by way of warming ocean temperatures and ocean acidification threatens the survival of marine organisms. For mussels, survival is tightly tied to byssal threads they form that anchor them to substrates, ... -
Embryonic xanthophore fate in the zebrafish, Danio rerio
(2014-04-30)Pigment patterns are one of the most diverse and visually appealing traits of any animal, playing important behavioral and ecological roles in mate choice, shoaling and predator avoidance. In the zebrafish, <italic>Danio ... -
The endocrinology and evolution of tropical social wasps: from casteless groups to high societies
(2013-04-17)The endocrinology and behavior of three social vespid wasps was studied in northeast Brazil (São Cristóvão, Sergipe) from 2010-2011. There were two main objectives of this work: to test a hypothesis on the origin of ... -
Enhancing Evolution: When Spatial Structure and Environmental Change Improve Adaptation
(2014-02-24)Evolution by natural selection is the primary creative force in biology. In order for populations to thrive, or even survive, requires a continual generative process. An understand of the process of natural selection, its ... -
Environmental drivers of spatial and temporal variability in lakes
(2002)Lakes are heterogeneous, three-dimensional landscapes, but are rarely appreciated as such. Organisms distribute themselves throughout these aquatic landscapes in a variety of ways, depending on the abiotic (e.g. temperature, ... -
Epithelial signals that influence the form and function of somatosensory neurons in Drosophila
Cell-cell interaction plays an important role in regulating cell morphology and function. In the peripheral nervous system, somatosensory neurons innervate our skin and interact with the epidermis to help us sense the ... -
The evolution and composition of RNA polymerase IV in plants
(2006)This thesis explores two aspects of the evolution of RNA polymerase in plants. In both cases, components of the RNA polymerase II transcription system of the nucleus were found to have undergone duplicative proliferation.In ... -
Evolution of Aquatic Plants in Rivers and Wetlands across the Andes in northern South America
Northern South America is one of the most biodiverse regions on earth and understanding the causes and processes that have led to the assembly of this rich biota has been central to ecological and evolutionary investigations ... -
Evolution of Endothelin Signaling and Diversification of Adult Pigment Patterns
Vertebrate forms are tremendously diverse. While there are many studies identifying genetic loci that have played a role in diversification, there are fewer that elucidate specific evolutionary changes and mechanisms at ... -
The Evolution of Temporal Polyethism
(2013-02-25)Temporal polyethism is a method of division of labor exhibited by many eusocial insect colonies, where the type of task an individual attempts is correlated with its age. The evolutionary pressures that give rise to this ... -
Evolution of the rbcS gene family in Solanaceae: concerted evolution and gain and loss of introns, with a description of new statistical guidelines for determining the number of unique gene copies.
Concerted evolution is a pattern of gene evolution resulting from mechanisms that homogenize gene copies within a lineage. Two mechanisms have been identified that may homogenize <italic>rbcS</italic> copies within Solanaceae. ... -
Evolutionary Dynamics of Pine Squirrels (Tamiasciurus) in Western North America
(2013-07-25)The evolution of new phenotypes and species is a population genetic process that is governed by four fundamental forces: natural selection, drift, mutation, and gene flow. Ecological genetics is the reciprocal interaction ... -
Evolutionary dynamics under various modes of reproduction
Chapter 1. Dispersal and migration are spatially limited in many natural populations. Such limitations can lead to clustering of like types, which weakens competition between unlike types; thus, the rate by which a fitter ... -
Evolutionary History of the Patagonian Liolaemus fitzingerii Species Group of Lizards
The majority of the world’s land mass and biota reside in the Northern Hemisphere. However, even when land area is accounted for, we know disproportionately less about Southern Hemisphere flora and fauna than their Northern ... -
The evolutionary implications of alternative larval development in ascidians
(2013-07-25)Considering traits that facilitate and inhibit evolutionary diversification can best be done with traits where the genetic and developmental basis is known. My PhD. research has focused on the evolutionary implications of ... -
Exclusion, Amelioration, Tolerance: An investigation of the physiological basis for tolerance in serpentine Mimulus guttatus
(2014-02-24)As sessile organisms, plants must cope with a variety of abiotic stress factors, including the mineral composition of soil. In serpentine soils, the low calcium-to-magnesium ratio has been shown to limit the growth and ... -
Exploring Drivers of Gene Flow in Jaguars and Pumas in Southern Mexico via Molecular Scatology and Eco-Evo Simulations
The profound fragmentation and degradation of Neotropical forests over the past 50-100 years poses a significant threat to the wildlife populations in Mesoamerica. Neotropical large carnivores, jaguars (Panthera onca) and ... -
Exploring Kinase Function and Drug Targets in Giardia lamblia
Giardia lamblia is the most commonly reported intestinal protozoan parasite and the cause of giardiasis, a gastrointestinal illness resulting in diarrhea, nutrient malabsorption, vomiting, and weight loss 1. It infects ...