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Articles 1 - 30 of 97
Full-Text Articles in Entire DC Network
Tracking Food Quality In Algae-Daphnia Ecosystems Through Stage Structured Models And Colimitation, Tomas Ascoli
Tracking Food Quality In Algae-Daphnia Ecosystems Through Stage Structured Models And Colimitation, Tomas Ascoli
Biology and Medicine Through Mathematics Conference
No abstract provided.
Impacts Of Hematodinium Infection In A Seasonal Population Model Of The Chesapeake Bay Blue Crab, Gwendolyn R. Sargent, Romuald Lipcius, Leah Shaw, Junping Shi, Jeffrey D. Shields
Impacts Of Hematodinium Infection In A Seasonal Population Model Of The Chesapeake Bay Blue Crab, Gwendolyn R. Sargent, Romuald Lipcius, Leah Shaw, Junping Shi, Jeffrey D. Shields
Biology and Medicine Through Mathematics Conference
No abstract provided.
Unraveling Gut Microbiota And Mucus Dynamics In Response To Polyethylene Glycol (Peg), Shaikh Obaidullah
Unraveling Gut Microbiota And Mucus Dynamics In Response To Polyethylene Glycol (Peg), Shaikh Obaidullah
Biology and Medicine Through Mathematics Conference
No abstract provided.
Modeling Overwash Processes And Sea Level Rise On Barrier Islands, Beth Thomas
Modeling Overwash Processes And Sea Level Rise On Barrier Islands, Beth Thomas
Biology and Medicine Through Mathematics Conference
No abstract provided.
Stage Structured Model For Oyster Restoration With Larval Transport, Sarah Brownstein
Stage Structured Model For Oyster Restoration With Larval Transport, Sarah Brownstein
Biology and Medicine Through Mathematics Conference
No abstract provided.
Mathematically Modeling Stoichiometric Drivers Of Nitrogen Fixation, Rebecca Everett, Corday Selden, Mohamed Hatha Abdulla, Jabir Thajudeen, James Powell, Edwin Cruz-Rivera, Luca Schenone, Renn Schipper, Megan Berberich, Halvor Halvorson, Robinson Fulweiler, Amy Marcarelli, Thad Scott
Mathematically Modeling Stoichiometric Drivers Of Nitrogen Fixation, Rebecca Everett, Corday Selden, Mohamed Hatha Abdulla, Jabir Thajudeen, James Powell, Edwin Cruz-Rivera, Luca Schenone, Renn Schipper, Megan Berberich, Halvor Halvorson, Robinson Fulweiler, Amy Marcarelli, Thad Scott
Biology and Medicine Through Mathematics Conference
No abstract provided.
Clustering Using Self Organizing Maps In Biology, Olcay Akman
Clustering Using Self Organizing Maps In Biology, Olcay Akman
Biology and Medicine Through Mathematics Conference
No abstract provided.
Relationship Between Trunk Cross-Sectional Area Growth And Water Stress In Garry Oaks (Q. Garryana): A Species Of Conservation Concern, John Cochrane
Relationship Between Trunk Cross-Sectional Area Growth And Water Stress In Garry Oaks (Q. Garryana): A Species Of Conservation Concern, John Cochrane
Student Research Symposium
In the Pacific Northwest, Quercus garryana (Garry oak trees) support over 627 native species. Garry oak natural habitat was originally maintained by indigenous practices but has been reduced to 5-10% of its range due to change in land management strategies. To support oak conservation, we need to understand heat and water affect the growth and physiology of this species. In this study, we created a fixed linear model of trunk cross-sectional growth with water stress (Ψ), photosynthetic water-use efficiency (δ13C), and leaf Carbon-Nitrogen ratio. We collected branch samples from the canopies of 47-64 mature Garry oaks in the …
Summer 2024 Research Proposal: Swanberg Sanctuary Prairie Plant Community Characterization And Management Testing, Jillian Becksfort
Summer 2024 Research Proposal: Swanberg Sanctuary Prairie Plant Community Characterization And Management Testing, Jillian Becksfort
Scholar Week 2016 - present
Prairie management is an involved process that is focused on maintaining existing grassland plant and animal communities. Invasive species and the spread of woody shrubs and trees presents a real threat to the existing prairie. Woody stems can affect resources such as water access and nutrient availability, which may cause changes to the prairie’s unique plant communities. Management techniques like burning and mowing are commonly used to prevent woody stems from causing changes to the prairie ecosystem. The Sanctuary was restored to natural prairie habitat in 2008 and a list of planted species is available. However, no plant surveys have …
Checking For Ticks: Analyzing The Efficiency Of Different Tick Collection Methods, Peter Briggs, Lawson Trimmell, Javier Monzón
Checking For Ticks: Analyzing The Efficiency Of Different Tick Collection Methods, Peter Briggs, Lawson Trimmell, Javier Monzón
Seaver College Research And Scholarly Achievement Symposium
Ticks are the most important arthropod disease vectors in both North America and Europe. Field collection of wild ticks is vital for research on the ecology of vector-borne diseases. Dragging and trapping are the two most common methods for collecting wild ticks. Dragging involves a researcher pulling a canvas through a field to collect ticks searching for a host, while trapping exploits ticks’ natural attraction to carbon dioxide to lure them onto a canvas where they get caught on tape. Our study aimed to evaluate which of these two methods is more effective. We chose six sites across three states, …
Evolution In Segregating Genotype Mixtures Of Subterranean Clover, P.G. H. Nichols, P S. Cocks
Evolution In Segregating Genotype Mixtures Of Subterranean Clover, P.G. H. Nichols, P S. Cocks
IGC Proceedings (1997-2023)
A complex segregating mixture of subterranean clover (Trifolium subterraneum L.), was sown in 1978 at Nabawa and Mt Barker, two contrasting sites in Western Australia. Seed harvested from both sites from 1980-1994 was grown out at Shenton Park in 1995, along with seed of the original mixture. Populations diverged markedly for mean days to first flowering (DFF) within three seasons. No further trends in mean DFF occurred in plants derived from the next 14 years, although standard deviation declined significantly in plants from Mt Barker. Between season differences in mean DFF were correlated with estimated growing season length at …
Role Of The Grassland Society Of Bosnia And Herzegovina In Grassland Agriculture, S. Alibegovic-Gbic, M. Bezdrob
Role Of The Grassland Society Of Bosnia And Herzegovina In Grassland Agriculture, S. Alibegovic-Gbic, M. Bezdrob
IGC Proceedings (1997-2023)
The biggest part of Bosnia and Herzegovina is covered with hilly and mountainous terrain, which, from the agricultural perspective, determines the manner of soil usage. Of all agricultural areas in Bosnia and Herzegovina, 55.49% are covered by grassland with that figure increasing to 79.14% in mountainous regions. Therefore, grassland agriculture and its cousin livestock production are the most significant part of the Bosnian economy. In the current situation natural grasslands are largely neglected and give a low yield of forage of low quality. Many areas are completely abandoned and have been gradually overgrown with weeds and bushes. Yet a special …
Exploration Of Differential Equation Models For Phage-Bacteria Population Dynamics, John Lawrence D. Palacios, Rebecca Segal
Exploration Of Differential Equation Models For Phage-Bacteria Population Dynamics, John Lawrence D. Palacios, Rebecca Segal
Biology and Medicine Through Mathematics Conference
No abstract provided.
Identifiability Analysis Applied To Rhizbium-Legume Symbiosis Model, Meghan Peltier
Identifiability Analysis Applied To Rhizbium-Legume Symbiosis Model, Meghan Peltier
Biology and Medicine Through Mathematics Conference
No abstract provided.
Mathematics Of Population-Genetics Model For Assessing The Impacts Of Insecticide Resistance And Temperature On Population Abundance Of Malaria Mosquitoes, Jemal Mohammed-Awel
Mathematics Of Population-Genetics Model For Assessing The Impacts Of Insecticide Resistance And Temperature On Population Abundance Of Malaria Mosquitoes, Jemal Mohammed-Awel
Biology and Medicine Through Mathematics Conference
No abstract provided.
Exploring The Dynamics Of Bacterial Populations In The Gut Microbiota, Shaikh Obaidullah
Exploring The Dynamics Of Bacterial Populations In The Gut Microbiota, Shaikh Obaidullah
Biology and Medicine Through Mathematics Conference
No abstract provided.
Simulation And Latin Hypercube Sampling Of Mixed-Time Models In A Consumer-Resource Relationship, Boluwatife E. Awoyemi, Amanda N. Laubmeier, Richard L. Rebarber
Simulation And Latin Hypercube Sampling Of Mixed-Time Models In A Consumer-Resource Relationship, Boluwatife E. Awoyemi, Amanda N. Laubmeier, Richard L. Rebarber
Biology and Medicine Through Mathematics Conference
No abstract provided.
Co-Flowering Community Effects On The Relative Contribution Of Pollen Quantity And Quality Limitation To The Reproductive Success Of Four Clarkia Species, Emma Moore
Appalachian Student Research Forum
More than 60% of plant populations experience low pollen availability which limits seed production (pollen limitation). Pollen limitation occurs due to low quantity or quality of pollen delivered to stigmas. Despite its ubiquity in nature, to date we still have limited understanding of the drivers of pollen limitation in plant communities. Plants typically occur in diverse communities where pollinator sharing is common and can influence quality and quantity aspects of pollen limitation. Co-flowering species can attract larger numbers of pollinators or they can compete for pollinators affecting pollen loads on stigmas. Pollinator competition may also lead to higher rates of …
Parasite Communities In Sunfish (Centrarchidae) From The Olentangy River, Sophia Holupka
Parasite Communities In Sunfish (Centrarchidae) From The Olentangy River, Sophia Holupka
Student Symposium
Parasites are common in freshwater fishes, and sunfish (Family Centrarchidae) in particular have been found to have diverse parasite communities in North America. We have been studying parasite communities that are found in sunfish (Family Centrarchidae) in three different localities (Delaware Run, River Run Park, and William Street Bridge) along the Olentangy River in Delaware, Ohio. The presence of multiple species of sunfish in the Delaware Run and nearby Olentangy River has given us an opportunity to compare parasites among them. A total of 212 fish were collected August 2022 through April 2023 and examined for parasites. We found a …
Deep Learning Can Be Used To Classify And Segment Plant Cell Types In Xylem Tissue, Sean Wu, Reem Al Dabagh, Fabien Scalzo, Helen Irene Holmlund
Deep Learning Can Be Used To Classify And Segment Plant Cell Types In Xylem Tissue, Sean Wu, Reem Al Dabagh, Fabien Scalzo, Helen Irene Holmlund
Seaver College Research And Scholarly Achievement Symposium
Studies of plant anatomical traits are essential for understanding plant physiological adaptations to stressful environments. For example, shrubs in the chaparral ecosystem of southern California have adapted various xylem anatomical traits that help them survive drought and freezing. Previous studies have shown that xylem conduits with a narrow diameter allows certain chaparral shrub species to survive temperatures as low as -12 C. Other studies have shown that increased cell wall thickness of fibers surrounding xylem vessels improves resistance to water stress-induced embolism formation. Historically, these studies on xylem anatomical traits have relied on hand measurements of cells in light micrographs, …
Modeling Functional Redundancy In Microbial Community, Sandra Annie Tsiorintsoa
Modeling Functional Redundancy In Microbial Community, Sandra Annie Tsiorintsoa
Biology and Medicine Through Mathematics Conference
No abstract provided.
Optimal Control And The Trojan Y Chromosome Eradication Strategy, Christopher Turner
Optimal Control And The Trojan Y Chromosome Eradication Strategy, Christopher Turner
Biology and Medicine Through Mathematics Conference
No abstract provided.
Gene Drives And The Consequences Of Over-Suppression, Cole Butler
Gene Drives And The Consequences Of Over-Suppression, Cole Butler
Biology and Medicine Through Mathematics Conference
No abstract provided.
Bioeconomic Analysis In A Predator-Prey System With Harvesting: A Case Study In The Chesapeake Bay Fisheries, Iordanka Panayotova, Maila Hallare
Bioeconomic Analysis In A Predator-Prey System With Harvesting: A Case Study In The Chesapeake Bay Fisheries, Iordanka Panayotova, Maila Hallare
Biology and Medicine Through Mathematics Conference
No abstract provided.
Spatial Patterning Of Predator-Prey Distributions Arising From Prey Defense, Evan C. Haskell, Jonathan Bell
Spatial Patterning Of Predator-Prey Distributions Arising From Prey Defense, Evan C. Haskell, Jonathan Bell
Biology and Medicine Through Mathematics Conference
No abstract provided.
Parameter Estimation Using Nudging On The Logistic Growth Equation, Susan Rogowski
Parameter Estimation Using Nudging On The Logistic Growth Equation, Susan Rogowski
Biology and Medicine Through Mathematics Conference
No abstract provided.
Effects Of Temperature Fluctuation On Interactions Between Generalist Insect Predators, Amanda N. Laubmeier, Nusrat Tabassum, Brigitte Tenhumberg
Effects Of Temperature Fluctuation On Interactions Between Generalist Insect Predators, Amanda N. Laubmeier, Nusrat Tabassum, Brigitte Tenhumberg
Biology and Medicine Through Mathematics Conference
No abstract provided.
Early Signs Of Regime Shift And Population Outbreak In A Two-Timescale Predator-Prey Model., Susmita Sadhu Dr.
Early Signs Of Regime Shift And Population Outbreak In A Two-Timescale Predator-Prey Model., Susmita Sadhu Dr.
Biology and Medicine Through Mathematics Conference
No abstract provided.
The Interplay Between Costly Reproduction And Unpredictable Environments Shapes The Stability Of Cooperative Breeding, Glenn Steven Young
The Interplay Between Costly Reproduction And Unpredictable Environments Shapes The Stability Of Cooperative Breeding, Glenn Steven Young
Biology and Medicine Through Mathematics Conference
No abstract provided.
Comparison Of Heavy Metals In Spinach Grown On The Roof Ground Location At Portland State University, Tyler A. Robin
Comparison Of Heavy Metals In Spinach Grown On The Roof Ground Location At Portland State University, Tyler A. Robin
Student Research Symposium
As a result of urbanization, fresh, healthy food can be expensive and easily contaminated but space for local farming is limited. Roofs can be underutilized in densely populated cities and can offer a space for local fresh farming. The purpose of this study is to continue a previous study done in 2021, to find if growing leafy vegetables on the roof can limit heavy metal exposure from air pollutants. This study compares spinach grown on the roof in 2021, 2019 and spinach bought from stores around the Portland State University campus and the heavy metals found in these greens. The …