Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Ecology and Evolutionary Biology (3)
- Biochemistry (2)
- Biochemistry, Biophysics, and Structural Biology (2)
- Chemistry (2)
- Environmental Sciences (2)
-
- Oceanography and Atmospheric Sciences and Meteorology (2)
- Physical Sciences and Mathematics (2)
- Analytical Chemistry (1)
- Arts and Humanities (1)
- Biogeochemistry (1)
- Biology (1)
- Chemicals and Drugs (1)
- Comparative and Evolutionary Physiology (1)
- Computational Biology (1)
- Diseases (1)
- Earth Sciences (1)
- Engineering (1)
- Engineering Science and Materials (1)
- Environmental Chemistry (1)
- Environmental Health and Protection (1)
- Environmental Indicators and Impact Assessment (1)
- Evolution (1)
- Fresh Water Studies (1)
- Genetics and Genomics (1)
- History (1)
- Medicinal Chemistry and Pharmaceutics (1)
- Medicine and Health Sciences (1)
- Natural Resources and Conservation (1)
- Neoplasms (1)
- Keyword
-
- Algal bloom (1)
- Algal blooms (1)
- Aluminum dosing (1)
- Artificial reefs (1)
- Biogeochemistry (1)
-
- Bombus (1)
- Bumblebee (1)
- Bumblebees (1)
- Cancer (1)
- Chlorophyll-a (1)
- Climate change (1)
- Coral reefs (1)
- Crithidia (1)
- Curcumin (1)
- Cyanobacteria (1)
- Dysbiosis (1)
- Evolution (1)
- Fanconi Anemia (1)
- History of science (1)
- Laromustine (1)
- Marine engineering (1)
- Marine science (1)
- Metagenomics (1)
- Microbiome (1)
- Molt migration (1)
- Monsoon (1)
- Morphometrics (1)
- Nutrient limitation (1)
- Oncology (1)
- Passerine (1)
Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Microbiome Community And Parasitic Infections In Wild Bees, Mark G. Young
Microbiome Community And Parasitic Infections In Wild Bees, Mark G. Young
Honors Theses
The microbiome is increasingly recognized for its complex relationship with host fitness. Akin to primates and other social animals, bumblebees harbor a specific microbiome derived from social contact. The bumblebee microbiome is characteristically species poor, with just a few “core” phylotypes accounting for the majority of total abundance. Genomic analyses reveal phylogenetic congruence and adaptation of the core endosymbionts to the bumblebee gut, indicating a shared evolutionary history. Prior investigations reveal that the relative abundance of core microbes is negatively associated with infection by a trypanosome, Crithidia bombi, and that the microbiome has a mechanistic role in immunity. As …
Artificial Reefs: A History, A Science, A Technology, Mairead D. Farrell
Artificial Reefs: A History, A Science, A Technology, Mairead D. Farrell
Honors Theses
Over the past 60 years, artificial reefs have expanded beyond the definition of a technology, and in turn have developed into a unique branch of marine science. To better emphasize this growth and separation, a brief history of artificial reef development and usage in chapter two shows some of the key shifts over time in this technology’s purpose and the materials used to achieve that goal. Likewise, to indicate the scientific development of artificial reefs as a branch of marine science, their usage for discovery and research is recorded in chapter three, along with the exponential increase in published scientific …
Contrasting Patterns Of Nutrient Limitation In The Littoral And Pelagic Zones Of Mesotrophic Maine Lakes, Grace C. Neumiller
Contrasting Patterns Of Nutrient Limitation In The Littoral And Pelagic Zones Of Mesotrophic Maine Lakes, Grace C. Neumiller
Honors Theses
Intense nutrient loading of nitrogen (N) and phosphorus (P) causes sudden regime shifts in freshwater ecosystems from clearwater to turbid conditions with frequent cyanobacterial blooms. Characterization of nutrient limitation patterns of primary productivity in these ecosystems is necessary for effective management of algal blooms. However, much of this research has focused on pelagic habitats. The influence of lake habitat (i.e. benthic littoral versus pelagic zones) on nutrient limitation of primary production in mesotrophic lakes is largely unknown, particularly in contrast to research on pelagic nutrient limitation in eutrophic systems. Using paired nutrient diffusing substrata and mesocosm experiments, we measured chlorophyll- …
The Quantitative Assessment Of Pond Scum: An Examination Of The Biogeochemistry Of Phosphorus Cycling In The Belgrade Lakes, Abbey M. Sykes
The Quantitative Assessment Of Pond Scum: An Examination Of The Biogeochemistry Of Phosphorus Cycling In The Belgrade Lakes, Abbey M. Sykes
Honors Theses
The internal recycling phosphorus in freshwater lake bottom sediments represents a significant source of hypolimnetic phosphorus (P) release for many of Maine’s lakes. In summer months, Maine lakes often thermally stratify and the lake hypolimnion develops anoxia, leading to a reduction in redox potential at the sediment-water interface. These reducing conditions facilitate the reductive dissolution of ferric iron, and, since phosphorus is often present in freshwater lake sediments as solid FeOOH-PO4 complexes, results in release of soluble phosphorus into the water column. Our current study presents field and laboratory data from sediment fractionation extractions designed to quantify concentrations of …
Impact Of The North American Monsoon On Molt Migrant Passerines, Liuqingqing Yang
Impact Of The North American Monsoon On Molt Migrant Passerines, Liuqingqing Yang
Honors Theses
Breeding, molt, and migration place considerable yearly demands on migrating passerines in North America. Due to conflicts in energy allocation, many species have evolved migration strategies that prevent temporal overlap in these processes. However, there is recent evidence that some passerines which breed in western North America migrate to intermediate stopover sites to carry out molt, conflating molt and migration. Factors influencing the evolution of such a strategy are believed to include both aridity on breeding grounds and dependable flushes of late-summer productivity in the southwestern United States and northwestern Mexico. This productivity occurs due to the brisk rainfall of …
Use Of Small Molecule Fanconi Anemia Pathway Inhibitors As Sensitizing Agents To Laromustine., Sam W. Marchant
Use Of Small Molecule Fanconi Anemia Pathway Inhibitors As Sensitizing Agents To Laromustine., Sam W. Marchant
Honors Theses
Laromustine is an experimental chemotherapeutic sulfonyl hydrazine prodrug shown in clinical trials to be effective against acute myeloid leukemia. The mechanism of action of laromustine involves interstrand crosslinking, via chloroethylation, and enzyme inhibition, caused by carbamoylation. The work described herein aims to investigate whether inhibition of the replication-dependent interstrand crosslink repair Fanconi Anemia pathway further sensitizes cells to laromustine. By measuring metabolic activity immediately after drug exposure, we find laromustine to be equally as cytotoxic towards Fanconi Anemia deficient and wild type cells. However, through clonogenic assays we show Fanconi Anemia mutations sensitize cells to laromustine’s anti-proliferative effect. Furthermore, we …
Morphological Variance In Mouthparts And Foraging Behavior In Bumblebees, Ye Jin Lee
Morphological Variance In Mouthparts And Foraging Behavior In Bumblebees, Ye Jin Lee
Honors Theses
Bumblebees (Hymenoptera: Apidae: Bombus) show an incredible degree of size variation within and between species. Individuals from the same hive may vary up to 10-fold in mass. This variation allows individuals to specialize in foraging on different flowers suited to their morphology. However, as different species have different foraging behaviors, their variation in mouthparts and scaling of mouthparts to body size may have been under different kinds of stabilizing selection as they adapted to collect nectar from flowering plants over evolutionary time. Here, we examined the scaling relationships between body size and mouthpart structures, and the variation in mouthpart shape …