Browsing Biology by Title
Now showing items 70-89 of 123
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Late Cretaceous and Paleocene Lissamphibia and Squamata of Montana and the end-Cretaceous mass extinction
Late Cretaceous and Paleocene lissamphibians (e.g., salamanders and albanerpetontids) and squamates (e.g., lizards and snakes) are common components of the nonmarine vertebrate fossil record of North America. However, ... -
Local impacts of global change: shifting range limits, advancing phenology, and communicating research
There are two generalizable biological impacts of climate change: first, species are shifting their distributions (both pole-ward in latitude and up in elevation), and second, species are advancing their spring phenology. ... -
Long Range Transport of Microorganisms in the Upper Atmosphere
(2013-04-17)Microorganisms are abundant in the atmosphere and can be transported globally on winds. In general, the upper atmosphere is an understudied, extremely harsh environment where the limits of life can be tested unlike anywhere ... -
Mammalian faunal recovery following the Cretaceous-Paleogene mass extinction: a multifaceted investigation
The Cretaceous-Paleogene (K-Pg) mass extinction and subsequent recovery were a turning point for terrestrial ecosystems, signaling a shift from communities dominated by dinosaurs to those dominated by mammals. Mammalian ... -
Many paths to chlorophyll: the evolution of protochlorophyllide oxidoreductases in the algae
Cyanobacteria, eukaryotic algae and some land plants catalyze the second to last step of chlorophyll a synthesis with either of two non-homologous enzymes: the light-independent (LIPOR) and light-dependent (POR) ... -
Microtubule Dynamics in Neuronal Morphogenesis
Microtubules in neurons provide structural stability, and also provide a transport route for cellular cargo carried by motor proteins. Exactly how microtubules are organized and maintained in neurons is not clear, but ... -
Modeling genetic networks to aid in understanding their function
(2003)Data on genetic interactions is accumulating at a very high rate. Here I introduce a new tool for analyzing this data at the level of genetic networks. The software program I helped write, called Ingeneue, lets the user ... -
Molecular regulations and lineage tracing in early Mouse embryogenesis
(2013-04-17)This dissertation research aims to understand the regulations and developmental patterns of mouse early embryogenesis, in order to gain comprehensive knowledge in human early development to further the ultimate goal of ... -
Molecular systematics of the genera Microcystis, Anabaena, and Aphanizomenon of the cyanobacteria
(2002)A phylogenetic analysis of the Genus Microcystis , Order Chroococales, and the Genera Anabaena and Aphanizomenon, Family Nostocaceae, Order Nostocales, within the Division Cyanophyta was conducted using DNA sequences from ... -
Mollusca Non-Grata: The influence of top-down control and residence time on the abundance, distribution, and behavior of non-native marine snails in Washington State
Invasive species can cause complex, unpredictable changes in ecological community dynamics because they do not share a long evolutionary history with resident species, meaning interactions could be much stronger or weaker ... -
Multi-component chemical defense in seahares (Gastropoda:Opisthobranchia): antipredator compounds act as both honest and deceptive signals to multiple predator species
(2002)Many organisms produce chemical defenses to deter predation, yet the behavioral, neurophysiological, and cellular mechanisms of chemical defenses are largely unexplored. Animals do not face a single hypothetical predator, ... -
Multiple zebrafish atoh1 genes specify a diversity of neuronal types in the zebrafish hindbrain
The basic Helix-Loop-Helix transcription factor, Atoh1, is known to specify several neuronal subtypes including one of most abundant cell types in the vertebrate brain, cerebellar granule neurons. The function of atoh1 in ... -
Nonlinear material properties shape locomotor performance in hydrozoan jellyfish
(2002)Nonlinear mechanics and dynamics are pervasive at all levels of biological organization. Chapter 1 presents an overview of the diversity of nonlinear mechanics across various spatial scales and nonlinear dynamics over ... -
On the variation of traits and tree range constraints
Ecology in the 21st century faces the considerable challenge of predicting how ecosystem structure and function will respond to rapid global environmental change. In order to meet this challenge, ecology must transcend ... -
The Paleobiology of South African Therocephalian Therapsids (Amniota, Synapsida) and the Effects of the End-Permian Extinction on Size, Growth, and Bone Microstructure
(2013-11-14)Despite their relative diversity in terrestrial Permian and Triassic rocks, the fossil record of therocephalian therapsids (Eutheriodontia) and their utility for understanding evolutionary patterns in the therapsid forerunners ... -
Pattern and process in primary succession in high elevation habitats on Mount St. Helens
(1987)The mechanistic basis of primary succession remains poorly known. The facilitation model, thought to describe primary succession, stresses the environmental modifications caused by early colonists as important in promoting ... -
Phenotypic plasticity in the red alga Porphyra abbottae: environmental factors influencing light harvesting ability
(1990)Gametophytes of the red intertidal macroalga Porphyra abbottae were grown in batch cultures in order to examine some of their plastic responses to key environmental factors. Conchospores from a conchocelis stock culture ... -
Phylogeography, population genetic structure, and reproductive biology of antelope ground squirrels
(2006)The genetic structure of populations over a wide geographic area should reflect the demographic and evolutionary processes that have shaped a species across its range. Similarly, variation in physiological traits should ... -
Physiological and behavioral responses to temperature and flow in the barnacle Balanus glandula Darwin (1854)
(2013-11-14)Given the scale and pace of anthropogenic change in marine environments, it is important to understand the manner in which organisms respond to environmental uncertainty. For many aquatic species, fundamental processes ... -
PIE-1, MEX-5, MEX-6, and soma/germline asymmetry in C. elegans embryos
(2000)The separation between soma and germline in C. elegans embryos occurs through a series of asymmetric cell divisions initiating with the 1-cell stage. Each of these divisions results in one daughter that will produce only ...