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Browsing Biology by Title
Now showing items 29-48 of 207
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Circadian clock regulation of chemical communication between plants and pollinators: a case study of Petunia flowers and Manduca hawkmoths
Pollination services from animals ensure successful reproduction and outcrossing for many flowering plants. Recruitment of pollinators most often involves a combination of signals which are deployed from floral tissues. ... -
The Circadian Regulation Of Glucocorticoid Release In Rodents
(2013-02-25)Nearly all organisms living near the surface of the Earth contain circadian (circa - "about"; diem- "day") clocks functioning as an endogenous timekeeping mechanism by which the organism can coordinate biological processes ... -
Climate change impacts on kelp: Physiological responses across habitats, species, and populations
Climate change is impacting organisms globally and increasing stressors like warming in both the atmosphere and ocean. Foundation species have disproportionate effects on their local environments through the provision of ... -
Climate change impacts on the distribution and performance of plant species at Mount Rainier
Ongoing anthropogenic climate change has profound implications for species, communities and ecosystems around the world. Yet climate is only one of many important drivers in ecological systems, with topography, soils, ... -
Climate Impacts and Adaptation of US Maize
Over the next three decades rising population and changing dietary preferences are expected to increase food demand by 25–75\%. At the same time, climate is also changing — with potentially drastic impacts on food production. ... -
Comparison of hair and DNA-based approaches in dietary analysis of free-ranging wolves (Canis lupus) in Alberta, Canada
Dietary information of free-ranging animals is essential for understanding their ecology, conservation and management. Carnivore diet is most frequently estimated using morphological analysis of prey remains found in scats. ... -
Computational and experimental studies reveal a role for airframe configuration in insect flight control
Research on insect flight control has focused primarily on the role of wings. Yet airframe de- formations via abdominal deflections during flight may potentially influence the dynamics of flight and play a significant role ... -
Conserving primates in Colombian bamboo forest fragments: logging and landscape impacts on Red Howler Monkeys
Increasingly, conservation of tropical forest-dwelling species depends on maintaining their populations in human-dominated landscapes. Often, extensive deforestation has left only fragmented forests that are subject to ... -
Cytoskeletal Innovations in Giardia lamblia
The single-celled eukaryote Giardia lamblia is one of the most common gastrointestinal parasites worldwide; infection causes diarrhea and vomiting, which can lead to dehydration and malnutrition. As an early divergent ... -
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 ...