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Presenters & Abstracts: College of Natural Resources & Sciences
DOC Sampling from Little River and Mad River
- Mark A MorenoChemistryUndergraduate Student
- David ZeitzChemistryUndergraduate Student
- Claire TillChemistryFaculty
Dissolved Organic Carbon (DOC) is a fraction of organic carbon with size less than 0.2 micrometers. DOC comes from decomposed plants, bacteria, and algae. Abundant in marine and freshwater systems, it serves as the primary food source for aquatic webs. Generally, rivers have higher concentrations of DOC than the ocean does. In the estuary, a linear relationship between salinity and DOC indicates that the DOC concentration is fully due to mixing of freshwater and saltwater, and not any significant additional source or removal terms. DOC concentrations decreased from river to ocean. Scholarly articles have pointed this to be normal. Interpretation of data will continue.
Does Juvenile Life History Affect the Marine Survival Rate of Coho Salmon?
- Grace GhristDepartment of Fisheries BiologyGraduate Student
I created a full life cycle model for Coho Salmon in Freshwater Creek in an effort to estimate separate overwinter and marine survival rates for two distinct juvenile life history strategies.
Dragon Ecology
- Daisy MontalvoMathematicsUndergraduate Student
- Ezra MorenoMathematicsUndergraduate Student
Research focus is the resources and abiotic requirements 3 dragons ( from TV series Game of Thrones) need in order to survive different environments around the world.
Duff accumulation around legacy sugar pines in the Russian Wilderness in northwest California
- Angelo DiMarioForestry - Wildland Fire ManagementUndergraduate Student
Fire suppression over the 20th century has created dangerous conditions in many western forests. Removing fire as a natural disturbance has brought about increased fuel loading and extreme fire behavior in many areas. This study researched the accumulation of duff mounds (decomposed plant material) around legacy sugar pine (Pinus lambertiana) in the Russian Wilderness Area of the Klamath National Forest. Large amounts of fuel beneath trees poses the potential risk of tree mortality, even in a low intensity fire By assessing the dimensions, volume, distribution and physical properties of duff mounds, we can better the variability of how and where duff mounds accumulate.
Dymaxion Projection
- Brian MurphyESM: Geospatial ScienceUndergraduate Student
- Gilbert TrejoGeographyUndergraduate Student
- Erika GranadinoESM: Policy and Managment
An exploration of various spatial phenomena using the Dymaxion Projection (aka Fuller Projection).
Early Cretaceous Cupressaceae in the Budden Canyon Formation of northern California
- Ashley OrtizBotanyUndergraduate Student
The Early Cretaceous Budden Canyon Formation of North America contains a few anatomically preserved plant fossils ca. 125 Ma old (Barremian-early Aptian). Recent investigations of the Budden Canyon Formation have revealed a preserved seed cone assignable to the Cupressaceae. Based on serial sections and a 3-D reconstruction, the fossil cone was compared with living Cupressaceae and revealed significant differences from most genera and closest similarity, but not identity, with Sequoia. The age and morphology of the cone also suggests that it may represent an extinct member of the sequoioid, a lineage which gave rise to modern redwoods (Sequoia) and giant sequoias (Sequoiadendron).
Ecocentrism vs. Individualism
- Marcos MaciasZoologyUndergraduate Student
Congress okays reducing sea lion populations to help out Chinook Salmon. Salmon are a cultural importance to Indigenous populations and play a key role in the ecosystems it lives in. The idea of killing a natural predator to save another that is used in many ways. The declining salmon populations are being affected by many different pressures and many others are being affected by it such as killer whales.
Eelgrass beds impact on juvenile Dungeness crab in Humboldt Bay, CA.
Jillian Hodge, Wildlife Undergraduate Student
College of Natural Resources & SciencesThe Dungeness crab (Metacarcinus magister) is a pivotal decapod species along the Pacific coast, playing a significant role both economically and ecologically. This study aimed to investigate the influence of common eelgrass (Zostera marina) beds on juvenile Dungeness crab populations within Humboldt Bay, California. Utilizing crab hoop traps deployed across 30 sites at four distinct beach locations, the research sought to identify habitat preferences and better understand the ecological dynamics shaping juvenile Dungeness crab distributions.
Effect of Channel Size on the Development of Resistance in a Carbon Nanotube Network
- David ZeitzDepartment of ChemistryUndergraduate Student
- Carla QuinteroPhysics and Astronomy
- Ruth SaundersPhysics and AstronomyFaculty
The burgeoning demand for nanotechnology presents a specific issue in that it requires the production of electronic components at a physical scale that is difficult and costly to achieve. Carbon nanotubes (CNTs) have potential in a wide range of electronics applications (1), but there are many lingering questions about their behavior. This project seeks to use computational modeling to propose a relationship between the number of CNT-on-CNT contacts and the effective resistance of a CNT network as the physical parameters change.
Effect of Size at Release on Tendency of Trinity River Hatchery Steelhead (Oncorhynchus mykiss) to Return as Half-Pounders
- Kaitlyn ManishinFisheries BiologyUndergraduate Student
I used scale analysis to estimate the half-pounder frequency among wild and hatchery steelhead from the Trinity River 2011 and 2012 smolt years and compare those estimates to the half-pounder frequency from 1993 until 2008. Hatchery steelhead from 2011 and 2012 had higher half-pounder tendencies than those from 1993 until 2008. Wild steelhead from 2011 and 2012 also showed increased half-pounder tendencies. This supports the hypothesis that increased size at release of hatchery steelhead is related to decline in the half-pounder life history, but also suggests that another factor influences the half-pounder tendency of these steelhead.