Theses/Dissertations - Biology
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Resolving the evolutionary history of multiple groups of freshwater mussels (Bivalvia: Unionidae).
(2020-07-02)Freshwater mussels are a group of aquatic invertebrates comprised of approximately one thousand species worldwide, and the greatest diversity of freshwater mussels lies within North America with at least three hundred ... -
Blubber fatty acid signature analysis of harbor seals in Alaska, 1997-2010.
(2022-03-21)The projected course and rate of global climate change presents major challenges to the wellbeing and survival of Arctic and subarctic marine mammals. In Alaska, the harbor seals (Phoca vitulina richardii) broad range and ... -
Functional characterization of olfactory receptors and molecular species identification of vector mosquitoes.
(2022-02-28)Mosquitoes are responsible for the transmission of hundreds of etiological agents. Many of these are emerging infectious diseases including, dengue, malaria, yellow fever, and Zika. Not all species of mosquitoes are ... -
Toward re-scaffolding the Phanerozoic : an improved representation of plants in the Late Paleozoic Ice Age.
(2022-03-04)Plants have served as the scaffolding of terrestrial ecosystems for hundreds of millions of years. Era-appropriate vegetation function and distribution are critical to resolve Earth’s natural history and potential future ... -
Epigenetic modulation of epithelial-mesenchymal plasticity through chromatin modifiers KDM6A and CTCF.
(2022-04-22)Epithelial-mesenchymal transition (EMT) and its reversal, mesenchymal-epithelial transition (MET) drive tissue reorganization critical for early development. In carcinomas, processing through EMT promotes migration, invasion, ... -
Design and delivery of novel antimicrobial peptides (AMPs) targeted towards specific microbial pathogens.
(2021-10-22)Targeted therapies selectively eliminate a pathogen without disrupting the native microbiota. Traditional antibiotics, in contrast, destroy the native microbiota along with pathogens, causing adverse health outcomes for ... -
Effects of nutrient stoichiometry and environmental conditions on the growth, toxin concentration, and nitrogen uptake of cyanobacteria.
(2021-10-27)Anthropogenic influences are negatively affecting water bodies by both increasing the concentrations of nutrients as well as contributing to increased temperatures from climate change. Nitrogen (N) and phosphorus (P) are ... -
The production, nitrogen, and phosphorus dynamics of Elodea sp., Potamogeton sp., and Nitella sp. in Sam Rayburn reservoir, Texas.
(1978)The 1977 annual maximum biomass of Elodea sp., Fota- — 2 mogeton sp., and Nitella sp. was found to be 1013.6 g m~ , 168.4 g m **, and 32?.6 g m~'', respectively. Combined, these plants produce 80,528.16 kg dry wt lake”* ... -
Variation in benthic community structure: the role of the macroenvironment along a downstream gradient.
(1984)McKittrick Creek, a discontinuous mountain-desert stream in Guadalupe Mountains National Park, Texas, was sampled at discrete 1 ocations(pools ) to test for differences among biomass, density, species diversity, equitability, ... -
Age and growth of the white crappie, Pomoxis Annularis Rafinesque, in Lake Waco, Texas.
(1969)The major collection of white crappie was from 17 July 1967, to 10 April 1968, by traps and gill nets. Other fish were taken by anglers and seines in June 1968. A total of 1142 fish were included in this study. Spawning ... -
The ostracode Cypridopsis vidua: physiological response due to thermal stress.
(1973)Upper temperature effects were measured on the mean oxygen consumption, carbon dioxide production, ingestion, assimilation, and egestion rates of the ostracode Cypridopsis vidua. to determine positive or negative effects ... -
Some effects of thermal history on the largemouth black bass, Micropterus salmoides (Lacepede), of two central Texas reservoirs receiving power plant effluents.
(1972)Mean annual growth of the first three age classes of largemouth black bass from Tradinghouse Reservoir was near the average growth reported in the literature for southern waters. Largemouth black bass collected from the ... -
Structure and photosynthetic response to abrupt thermal stress of a periphyton algal community colonized in a power plant discharge canal.
(1976)Tremendous increases in energy needs have led to construction of many new power plants. Effects of heated power plant effluents on aquatic organisms have not been clearly established, Periphyton community structure was ... -
Pond succession on the Kaibab Plateau, Arizona.
(1969)Quantitative data were obtained for a serai comparison of five sinkhole ponds on the Kaibab Plateau, Arizona. Species diversity, community metabolism, primary production, and relative serai rank were assayed. Information ... -
Phytoplankton production in a central Texas reservoir.
(1969)Phytoplankton production and other environmental variables were measured from June to November, 1968 to determine factors affecting production and trophic status of the producer community in a shallow, polymictic, central ... -
Phytoplankton productivity of tropical Lake Chapala, Mexico.
(1985)Phytoplankton productivity and other environmental variables were measured for one year (June 1983 - June 1984) at five stations on Lake Chapala, Mexico. Contrary to expectations, productivity in this shallow, tropical ... -
Uptake and utilization of alanine-1-14C by freshwater algae.
(1969)Experiments were conducted x^ith Chlorella pyrenoidosa, Cosmarium formosulum, and Gloeocapsa sp. to determine their relative heterotrophic capacity at various conditions. Cultures were incubated in nutrient media with ... -
Hypolimnetic oxygen decline and the hypolimnetic bacterial community.
(1998)This study reports on bacterial cell size and abundance change during oxygen depletion of Belton and Stillhouse Hollow reservoir. Bacterial cell size and abundance are compared with amount of heterotrophic nanoflagella ... -
Phytoplankton production dynamics in nutrient pulsed systems.
(1997)Phytoplankton production is determined by light and inorganic nutrients which govern the biomass of primary producers. These variables are a function of watershed rainfall periodicity and water quality from the run-off ... -
How does the material adsorbed onto flood-borne sediment affect lake zooplankton populations?
(1997)The effect of materials adsorbed onto flood-borne sediments on Brachionus calyciflorus was investigated in this study. Sediment samples were collected from the North Bosque River and South Bosque River which drain into ...
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