Recursos de colección

The KnowledgeBank at OSU (74.597 recursos)

Knowledge Bank contains collections of presentations, publications and reports related to Ohio State University.

Natural Resources

Mostrando recursos 1 - 20 de 67

  1. Poor Pawpaw Production in Woodland Patches- What's the Explanation?

    Brigner, Liberty
    The pawpaw (Asimina triloba) is a small fruit-bearing tree in the Annonaceae family, known for being the only tree native to the United States that bears large edible fruit (Callaway, 1990). These trees are of high cultural importance to the state of Ohio and the surrounding region for their history as a reliable and nutritious food source, an indicator of good ecological condition and, due to their clonal growth, effective erosion control. Although common in the region, fruit production is often limited, and large-scale cultivation and commercialization has not been historically successful. To determine what affects fruit production in the...

  2. Why does predator abundance increase after invasion of a non-native prey?

    O'Shaughnessey, Erin
    Invasive species have been shown to have substantial effects on native food webs though their potential roles as novel predators or novel prey. As novel prey, invasive species have been recently shown to cause native predator populations to increase in abundance and growth rate following introduction. However, we know little about whether the magnitude of the effect of invasive species as novel prey depends on particular traits of native predator species. The goal of this study was to conduct a literature search to identify the characteristics of native predators that might influence the magnitude of effect that non-native prey might...

  3. Measuring the Implicit Value of Subsurface Mineral Rights in Eastern Ohio

    Cultice, Brian
    Shale gas development has proliferated in eastern Ohio, leading to questions about the economic impacts of the influx of entities seeking to explore and extract minerals in the region. A major source of economic gain for landowners in these areas is direct revenue from the purchasing and leasing of mineral rights by the mineral extraction industry. However, there is a history of mineral development in Eastern Ohio, implying the existence of split estates, situations in which the surface and subsurface rights for a given parcel of land are separately owned. While mineral rights are directly traded in the market, their...

  4. An Analysis of Levels of Optimism, Self-Efficacy, and Types of Motivations of Farmers in Alternative Agriculture: Understanding Small and Medium-Scale Organic and Local Farmers at the Rural-Urban Interface

    Goldberg, Kayla
    This research focuses on comparing farmers at the rural-urban interface involved in various types of alternative agriculture, such as organic crop production, and various types of marketing such as local-direct sales, and local-intermediated sales. The internal factors that are analyzed are farmer levels of optimism in regards to their farms, self-efficacy related to making positive changes in their communities, feelings of belongingness in their communities, and motivations or goals related to farming. The research looks first at differences and similarities across alternative types: organic, local, both organic and local (dual-motivated), and neither. The second analysis looks at comparisons across farmers...

  5. Evaluating the Impacts of Outdoor Orientation Programs at The Ohio State University

    Rhodus, Ethan
    Across higher education institutions, pre-enrollment programs (PEP) have been developed to improve the transition experience for incoming students. Of these PEP, outdoor orientation programs have been highly successful in increasing student retention, improving sense of belonging, and increasing student GPA. While there has been previous research looking at programs offered for incoming students at The Ohio State University, there has not been a focused project looking at the differences in outcomes between the various types of programs. Anecdotal evidence suggests that outdoor orientation programs have had success at OSU, but only limited evaluation of these programs has occurred. The aim...

  6. How Physical Amenities Relate to the Mental Well-being of Columbus Residents

    Goldberg, Kori
    Research into the well-being of individuals and communities has identified a number of environmental factors that contribute to overall well-being. This project looks at two neighborhoods within Columbus (Olde Towne East and Clintonville) and the relationship that physical amenities in those neighborhoods may have to the mental well-being scores of the residents. Three amenities, green space, blue space, and walkability were analyzed specifically.

  7. The Optokinetic Response of Fishes to Different Levels of Turbidity

    Robbins, Jeffrey
    Many fish need light to school, reproduce, and forage. Without enough light penetrating into an aquatic system fish may not be able to accomplish these tasks, thus compromising their ability to persist. Turbidity, or suspended particles in the water, is a serious global problem due to increased run-off from urban and agricultural activities. High turbidity has the potential to reduce light to a point where fish are unable to detect the visual environment. The first objective to this project was to develop an optomotor response apparatus for testing the visual abilities of fish under increasing turbidity. Due to the optokinetic...

  8. Social Sustainability in the Food System: Examining Innovative Local Government Plans

    Metzler, Rachel
    Over fourteen percent of households in the United States (US) are food insecure (USDA, 2013). At the same time, small and midsize farmers have been under pressure for the past 40 years from an economic and political system that champions and rewards large-scale commodity production (USDA, 2012). Communities, including local government actors, across the country are acting to build food systems that address these issues. These actions, which are one focus within the broader alternative agrifood movements (AAMs), are largely based upon the ideal of creating a just and sustainable food system (Constance, et. al, 2014). However, the incorporation of...

  9. The relationship between turbidity and carotenoid-based coloration of centrarchid fishes in urban streams

    Atkinson, Tiffany
    Agricultural and urbanization practices cause runoff of nutrients and sediments into aquatic systems, leading to elevated turbidity levels (i.e., amount of suspended particles in the water) and loss of aquatic biodiversity. Increased turbidity can alter visual environments through the differential scattering and absorption of light underwater. Therefore, in fishes that use visual cues to find mates, the effectiveness of visual signals can be compromised by turbidity and interfere with mating systems such that hybridization can occur. Carotenoid pigments responsible for red and yellow color patterns are energetically costly for fish to acquire from their diet. If signals are interrupted by...

  10. Effects of aquatic habitat degradation on hybridization between two species of Sunfish: Bluegill (Lepomis macrochirus) and Green Sunfish (Lepomis cyanellus)

    Wittman, Jacob
    Stream habitat degradation includes factors such as as increased turbidity and excessive sedimentation of the streambed resulting from surrounding urban land use and development. It is hypothesized that these two physical characteristics of streams have the greatest effect on hybridization of closely related fishes, leading to decreased biodiversity. The objective of this research was to determine if there is a correlation between substrate sedimentation, turbidity, and Hybrid Sunfish abundances. Hybridization between Bluegill (Lepomis macrochirus) and Green Sunfish (Lepomis cyanellus; an indicator of poor water quality), referred to as Hybrid Sunfish, was investigated. Additionally, species composition in degraded systems was investigated...

  11. Changes in Composition and Diversity of an Urban Bottomland Forest over Time

    Kaiser, Michelle
    The loss of biodiversity has been major conservation concern around the world as a result of urbanization, increasing deforestation, and agriculture use. This project aims to inventory and assess the vegetative diversity of a local 12 acre bottomland hardwood forest community located in the Schiermeier Olentangy River Wetlands Park and historical forest data that was summarized from original public land survey records. Biodiversity surveys were conducted in two parts, with trees and herbaceous surveys completed in fall 2014 and another herbaceous survey completed in spring 2015. Shannon’s diversity index was calculated using species presence and absence data. Results from both...

  12. Current Composition and Structure of a Disjunct Eastern Hemlock Ecosystem in Northwestern Alabama and Modeling Potential Hemlock Woolly Adelgid Infestation

    Denney, Robert
    Eastern hemlock (Tsuga canadensis (L.) Carr.) is a coniferous tree species native to a large portion of the eastern United States, and it is important in its role as a foundation species and in its contribution to landscape biodiversity. The southernmost populations of hemlock occur in Alabama, and these populations are unique in that they are disjunct from the main range of hemlock that has its southernmost point in northern Georgia. Unfortunately, the hemlock woolly adelgid (Adelges tsugae Annand; HWA), an invasive insect native to Japan, has been causing extensive hemlock mortality since the insect’s accidental introduction into the United...

  13. Assessing the effectiveness of a climate change communication intervention: an experimental study

    McClendon, Miranda
    The discussion surrounding climate change has gained momentum and expanded globally. Governments on the local and national level are making a concerted effort to develop action plans and policy frameworks to support climate mitigation and adaptation strategies in the face of increasing variable climate patterns and extreme weather events. Such efforts must be accompanied by effective communication pieces such that the audience is empowered to address the issue of climate change, especially in the political arena. But, how do we know if these communication interventions are effective? The goal of this study was to test the effect of a communication...

  14. Correlating Sediments and Microorganisms in Three Ohio Watersheds

    Sheban, Caitie
    Counties in Eastern Ohio within the Utica-Point Pleasant shale formation have experienced increased development of shale oil and gas. These operations have created areas of bare soil and dirt roads with high volumes of traffic. Soil erosion from these intensely used sites can lead to greatly increased sediment concentrations in waterways. The objective of this project was to examine how sediments in water affect the presence of microbes. The research also contributes baseline data to a larger project assessing the effects of shale development on water quality. Sedimentation has been recognized as the number one impairment of streams in the...

  15. The Efficacy of Water Quality Communication: A Case Study of the Choctaw Lake Community

    Hagley, Paige
    Harmful algal blooms in the United States have been increasing in number and economic cost in recent decades. Lake communities in Ohio are struggling to combat the causes of the growth in cyanobacteria populations. There is broad recognition of the importance of effective and strategic scientific communication to help address or prevent environmental problems. There are a variety of ways to inform the public about environmental problems, and such communication has the potential to improve the environmental literacy of the public and to increase support for regulations to address environmental problems. However, different sources of information can have different impacts...

  16. Consistent individual differences in boldness of an African cichlid fish (Pseudocrenilabrus multicolor).

    Oldham, Richard
    Recent research in animal behavior acknowledges that in many species, individuals exhibit consistent differences in behavior across time and ecological contexts (known as behavioral syndromes or animal personalities). Individual variation in behavior can be described as a trait (bold, shy, curious, social, aggressive, etc.). The behavioral trait studied here is boldness, or how an animal reacts to a situation perceived as dangerous. Boldness was measured by observing an individual’s foraging and anti-predation behavior after a simulated predation attack using a model predator. Individuals used in the study were F1 generation of wild caught cichlids (Pseudocrenilabrus multicolor) which came from two...

  17. Effects of N:P Ratio on the Occurrence of Harmful Algal Blooms

    Palus, James
    Urban and agricultural development has had dramatic effects on the biogeochemical cycles of nitrogen (N) and phosphorus (P). Such nutrient-rich conditions cause cyanobacteria to dominate the phytoplankton, thereby causing a number of problems in the water bodies they inhabit. Cyanobacteria exhibit rapid growth under high nutrient conditions, and as such have been increasingly referred to as harmful algal blooms (HABs) when they become overabundant in aquatic ecosystems. While nutrient run-off is thought to be the primary cause of HABs, it has been found that it is not necessarily the independent quantities of nitrogen and phosphorus that favor cyanobacteria, but rather...

  18. An Assessment of Infant Eastern Cottontail Rehabilitation Success

    Oberly, Morgan
    Eastern cottontails (Sylvilagus floridanus) are the most common species brought to the Ohio Wildlife Center for rehabilitation, but many of these are likely brought in unnecessarily. Eastern cottontails raise young to bring little attention to the nest, staying away during the day, which leads people to believe infants are in need of care. In cases where this is mistaken, less adequate care is provided for the rabbits in rehabilitation facilities than they would receive in the wild from a parent. Rates of successful rehabilitation leading to release are low for this species, and infants are easily stressed and difficult to...

  19. Exploring the relative influence of knowledge, values and risk perception on engagement in climate change mitigation behaviors.

    Connolly, Katherine
    As one of the largest emitters of greenhouse gases in the world, the United States and its citizens will undoubtedly play a pivotal role in climate change mitigation. Yet, despite the scientific consensus on the topic, most Americans are not taking significant steps to address climate change. In order to understand this inaction and more effectively motivate individuals to change their behavior, it is important to examine the psychological processes related to engaging in climate change mitigation behaviors. This study examined the relative influence of knowledge, values and risk perception on climate mitigation behaviors among Columbus, Ohio residents. As hypothesized,...

  20. Analyzing Ohio State University’s Food Purchasing System: Opportunities for Change through the Real Food Challenge

    Kington, Laura
    Students at Ohio State University (OSU) seek to achieve a university commitment to the Real Food Challenge (RFC), a national student movement that seeks to effect change in the food system through colleges and universities. In order to assess the likelihood of a commitment by OSU, and the efficacy of this strategy for forwarding alternative food movement goals, this study explores barriers to and opportunities for adoption of the RFC commitment through a diffusion of innovations framework. First, I examine characteristics common among institutions that have adopted the commitment and compare these institutional characteristics with OSU to identify possible structural...

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