Browsing Biology by Title
Now showing items 38-57 of 207
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Defining the cis-acting requirements in the HMG-CoA reductase gene for karmellae biogenesis
(1999)In yeast and mammalian cells, increased levels of the ER membrane protein, HMG-CoA reductase (HMGR), induce specific ER membrane arrays. Yeast express two HMGR isozymes, Hmg1p and Hmg2p, each of which induces a morphologically ... -
Determining day length and temperature regulation of flowering: a molecular and modelling approach
In nature, plants are exposed to numerous abiotic and biotic pressures. Temperature, day length, light quality, length of winter, herbivors, nutrients, and pathogens all affect plant development and change throughout the ... -
Developing and applying transient expression systems to identify and understand gene regulatory elements in plants
In this dissertation, I develop transient expression systems to enable massively parallel reporter assays (MPRAs) in crop models. I apply these transient assay systems to identify, characterize and design plant gene ... -
Development and Evolution of Cell Behavior and Interactions during Danio Pattern Formation
Danio fishes offer a tractable system for elucidating mechanisms of pattern formation and how they evolve, as fishes in this genus display a diverse array of pigment patterns that arise from a common set of cell types. ... -
Digging up the Past: Postcranial Perspectives on Mammals Across the Cretaceous-Paleogene Boundary
The extinction of non-avian dinosaurs at the Cretaceous-Paleogene (K-Pg, 66.04 Ma, million years ago) boundary is arguably the most seminal event in mammalian history. The K-Pg mass extinction and subsequent recovery marked ... -
Disease in Spheniscus penguins: Feather-loss disorder and Avian Pox
Avian pox and a previously undiscovered feather-loss disorder affect Spheniscus penguins. Avian pox is an enveloped doublestranded DNA virus that is mechanically transmitted via arthropod vectors or mucosal membrane contact ... -
Dispersal, disturbance, and distance: the connection between ecological processes and spatial genetic patterns in the Pacific jumping mouse (Zapus trinotatus)
(2005)Ecological mechanisms, such as dispersal, mating system, disturbance, and habitat affiliation can have profound impacts on genetic structure within a population, and on gene flow between populations. In this study, I ... -
Distribution and diversity of alpine lichens: biotic and abiotic factors influencing alpine lichen communities in the northeast Olympic and North Cascade Mountains
(1998)Alpine lichens from six specific sites in the northeastern Olympic and North Cascade Mountains were studied. Sites included Elk Mountain, Deer Park, and Buckhorn cirque from the Olympic Mountains; and Skyline Divide, Slate ... -
Diversification and Local Adaptation in Western Fence Lizards, Sceloporus occidentalis
I am fascinated by intraspecific variation–by both its sources and its potential implications for how organisms interact with their environments. The importance of intraspecific variation for predicting species responses ... -
Diversification of Galium within Tribe Rubieae (Rubiaceae): Evolution of Breeding Systems, Species Complexes, and Gene Duplication
(International Association for Plant Taxonomy; Botanical Society of America, 2010)Tribe Rubieae is unique within Rubiaceae with its herbaceous habit, temperate distribution, and whorls of leaf-like structures. This dissertation examines the evolution of the tribe, evolution a clade within the tribe ... -
Diversity and structure of subtidal rock walls in the Salish Sea: the roles of grazing, oceanography, and long-term change
(2013-04-17)The assembly and structure of communities is dictated by a number of ecological processes at a variety of spatial scales. Here I present an `ecology of places', to emphasize the need for both intensive, small-scale ... -
Diversity, distributions, and activity of bats in the San Juan Islands
The loss and fragmentation of natural habitats are some of the greatest threats to terrestrial biodiversity. Much of the practice of conservation science is rooted in Island Biogeography Theory (IBT). IBT postulates that ... -
Duplication and Functional Divergence in the Floral Organ Identity Genes
Among all extant land plant lineages, the flowering plants, or angiosperms, are by far the most abundant and diverse. A leading force in their speciation has been attributed to morphological changes in flowers, a key ... -
Ecological determinants of rockweed performance: interactions among herbivores, epiphytes and tides
(2014-04-30)Ecology seeks to understand how biotic and abiotic factors influence species distribution and abundance in order to make predictions about the outcome of interactions between species and their environment. The rocky ... -
Ecological factors affecting rates of spread in Cytisus scoparius, an invasive exotic shrub
(1996)Invasions of exotic species are among our most daunting conservation challenges, and range expansion models provide us with a framework for modelling them. I have focussed on ecological factors contributing to variation ... -
Ecological interaction among natural enemies and its consequences for biological control
(2000)One goal in pest control is to develop methods that suppress pests without harming other organisms. With this in mind, an ideal method would be to augment nontarget organisms to control a pest. This can be accomplished by ... -
Ecological Interactions in a Changing World
21st-century ecology is necessarily a science of change. Understanding how and why communities and interacting species respond to transformations in global climate and human land use can help improve our ability to forecast ... -
Ecological roles for corticosterone in birds: season, stages, habitat, and perturbations
(2006)Glucocorticoid hormones have multiple purposes. At low levels, they function to maintain basic energy and salt balance. At high levels, they are key hormones in the emergency response to noxious stimuli. In the short term, ... -
Ecology and Conservation of Magellanic and Galápagos Penguins in a Changing World
Climate change is rapidly altering the environment that wildlife experience, influencing their performance, ecological interactions, and population dynamics. Penguin species are threatened across the Southern Hemisphere ... -
Ecology and life history traits of Chondrichthyes: how cartilaginous fishes live and move through their environment.
Chondrichthyes (chimaeras, sharks, skates and rays) are a lineage of vertebrates with skeletons composed entirely of cartilage, that have existed for over 400 million years. This long evolutionary history has allowed them ...