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Changing Land Use On Unproductive Soils, Andrew Blake, Mike Clarke, Angela Stuart-Street

Resource management technical reports

A three year study completed in 2010 examined farming systems in the north-eastern agricultural region and eastern wheatbelt of Western Australia which experienced a succession of variable seasons from 2000. This culminated in severe drought in 2006 and 2007. At that time, farmers experienced labour shortages and declining terms of trade triggered by cost inflation outpacing growth in commodity prices. As a result, farm business equity was eroded as farm debt escalated. This left many farm businesses in a highly vulnerable state. At the time of the study many farmers were facing an uncertain future.

These experiences, coupled with a …

The Polarizing Impact Of Science Literacy And Numeracy On Perceived Climate Change Risks, Donald Braman, Dan M. Kahan, Ellen Peters, Maggie Wittlin, Paul Slovic, Lisa Larrimore Ouellette, Gregory N. Mandel

GW Law Faculty Publications & Other Works

Seeming public apathy over climate change is often attributed to a deficit in comprehension. The public knows too little science, it is claimed, to understand the evidence or avoid being misled. Widespread limits on technical reasoning aggravate the problem by forcing citizens to use unreliable cognitive heuristics to assess risk. An empirical study found no support for this position. Members of the public with the highest degrees of science literacy and technical reasoning capacity were not the most concerned about climate change. Rather, they were the ones among whom cultural polarization was greatest. This result suggests that public divisions over …

The Effect Of Disinfectants, Cleaning, And Drying Practices On Oriental Rugs Flooded With Contaminated River Water: Public Health And Policy Implications, Daniel Bernazzani

Antioch University Dissertations & Theses

Oriental rugs contaminated with Category 3 floodwater potentially harbor environmental bacteria known to be human pathogens. River water inoculated with three species of gram positive and gram negative environmental bacteria (Escherichia coli, Enterococcus faecalis, Pseudomonas aeruginosa) were used to assess the effectiveness of disinfectant type, cleaning methodology and drying practices by examining the survival rates of bacteria. Rug sections were immersed for one hour in contaminated water, saturated in one of three EPA registered disinfectant products (Phenol, Quaternary chloride, and Thyme oil) or tap water as a control, followed by cleaning and drying. The results showed that all disinfectants reduced …

Soil Microbial Community Response To Climate Change: Results From A Temperate Kentucky Pasture, Lindsey C. Slaughter

Theses and Dissertations--Plant and Soil Sciences

Climate change is likely to alter plant species composition and interactions between plants and soil microbes that together dictate the quantity and quality of forage produced in pastures, the base of animal production in central Kentucky. This study assessed the seasonal dynamics of soil microbes and their response to increased temperature (+3^oC) and growing season precipitation (+30% of the mean annual). Total soil microbial biomass, community composition, enzyme activities, potential carbon mineralization, and catabolic responses to selected substrates were measured seasonally in the different climate treatments. In this system, seasonal variability was a dominant driving factor for all …

Recent Changes In The Growth And Nutrient Limitation Of Benthic And Pelagic Algae In Arctic Tundra Ponds, Christina Hernandez

Open Access Theses & Dissertations

Arctic ponds are a dominant feature in Barrow, Alaska. Ponds may function as carbon sinks during the growing season from production of photosynthetic organisms like algae; however, little work has been done on this topic. Environmental changes have been occurring in the Arctic stemming from climate change and human perturbations. The focus of this study was to assess a historically studied region for changes in algal primary production that may have been produced due to increases in temperature over the past 40 years and increased human development. Additionally, this study aimed to determine nutrient limitation of algal production in the …

The Impact Of Decadal Land Cover Change On The Global Warming Potential Of Beringian Arctic Tundra, David Hwei-Len Lin

Open Access Theses & Dissertations

Arctic terrestrial ecosystems play an important role in the global carbon cycle. If arctic warming continues to rise as projected, large amounts of soil carbon stored in these ecosystems could be released to the atmosphere as carbon dioxide or methane and positively enhance greenhouse warming. Thus, improving understanding of the likely future state and fate of arctic soil carbon, and the carbon uptake potential of arctic terrestrial ecosystems are well recognized research priorities.

At the pan-arctic scale, decadal increases in NDVI (Normalized Difference Vegetation Index), an index of vegetation productivity, have been observed from satellite imagery, indicating a general greening …

Breeding Resistance To Butternut Canker Disease, James R. Mckenna, Keith E. Woeste, Michael Ostry

Department of Forestry & Natural Resources Faculty Publications

Butternut (Juglans cinerea L.) is being killed throughout its native range by an exotic fungus Ophiognomonia clavigignenti-juglandacearum (Ocj). In recent years, many disease-free trees have been determined to be complex hybrids with an admixture of Japanese walnut (J. ailantifolia). Recently developed molecular and morphological characterizations allow us to accurately identify and separate hybrid and pure butternut progeny. Disease-free-trees, from across butternut’s native range, are the basis of our breeding program in the Central Hardwood Region of the eastern United States. Our first clone banks and seed orchards were grafted and established in the 1990s and 2000s, and are now producing …

Adaptive Tolerance To Ocean Acidification In The Marine Sponge: Chondrilla Nucula, Sylvester Lee

Electronic Theses and Dissertations

The dramatic increase in atmospheric carbon dioxide since the Industrial Revolution has led to a 30% increase in ocean acidification over pre-industrial levels. Although most ocean acidification research thus far has focused on calcifying organisms such as corals, the potential of this increase in acidity (H+ ions) to cause acid-base imbalances in soft-bodied animals such as sponges has been grossly overlooked. Furthermore, many studies on ocean acidification have not considered the elevated temperatures that are predicted to accompany future climate change conditions. Sponges are crucial components to coral reef systems, providing food, nutrients, structure, and support. The sponge Chondrilla nucula …

Climate-Change Refugia In The Sheltered Bays Of Palau: Analogs Of Future Reefs, Robert Van Woesik, Peter Houk, Adelle L. Isechal, Jacques W. Idechong, Steven Victor, Yimnang Golbuu

Ocean Engineering and Marine Sciences Faculty Publications

Coral bleaching and mortality are predicted to increase as climate changeinduced thermal-stress events become more frequent. Although many studies document coral bleaching and mortality patterns, few studies have examined deviations from the expected positive relationships among thermal stress, coral bleaching, and coral mortality. This study examined the response of >30,000 coral colonies at 80 sites in Palau, during a regional thermal-stress event in 2010. We sought to determine the spatial and taxonomic nature of bleaching and examine whether any habitats were comparatively resistant to thermal stress. Bleaching was most severe in the northwestern lagoon, in accordance with satellite-derived maximum temperatures …

Local Conditions, Not Regional Gradients, Drive Demographic Variation Of Giant Ragweed (Ambrosia Trifida) And Common Sunflower (Helianthus Annuus) Across Northern U.S. Maize Belt, Samuel E. Wortman, Adam Davis, Brian J. Schutte, John L. Lindquist, John Cardina, Joel Felix, Christy L. Sprague, J. Anita Dille, Analiza H. M. Ramirez, Graig Reicks, Sharon A. Clay

Department of Agronomy and Horticulture: Faculty Publications

Knowledge of environmental factors influencing demography of weed species will improve understanding of current and future weed invasions. The objective of this study was to quantify regional-scale variation in vital rates of giant ragweed and common sunflower . To accomplish this objective, a common field experiment was conducted across seven sites between 2006 and 2008 throughout the north central U.S. maize belt. Demographic parameters of both weed species were measured in intra- and interspecific competitive environments, and environmental data were collected within site-years. Site was the strongest predictor of below ground vital rates (summer and winter seed survival and seedling …

Climate Change Impacts On Streamflow, Water Quality, And Best Management Practices For The Shell And Logan Creek Watersheds In Nebraska, M. W. Van Liew, S. Feng, T. B. Pathak

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Improvements in the management of water, sediment, and nutrients under future climatic conditions are needed to ensure increased crop and livestock production to meet greater global needs and the future availability of water for competing demands and protection against adverse water quality impairments. This study determined the impacts of future climate change scenarios on streamflow, water quality, and best management practices (BMPs) for two watersheds in Nebraska, USA. The Soil and Water Assessment Tool (SWAT) was employed to simulate streamflow, sediment, total nitrogen (N) and total phosphorus (P) from the Shell Creek Watershed near Columbus, Nebraska and the Logan Creek …

Reconciling Estimates Of The Contemporary North American Carbon Balance Among Terrestrial Biosphere Models, Atmospheric Inversions, And A New Approach For Estimating Net Ecosystem Exchange From Inventory-Based Data, Daniel J. Hayes, David P. Turner, Graham Stinson, A. David Mcguire, Yaxing Wei, Tristram O. West, Linda S. Heath, Bernardus Dejong, Brian G. Mcconkey, Richard A. Birdsey, Werner A. Kurz, Andrew R. Jacobson, Deborah N. Huntzinger, Yude Pan, W. Mac Post, Robert B. Cook

United States Geological Survey: Staff Publications

We develop an approach for estimating net ecosystem exchange (NEE) using inventory-based information over North America (NA) for a recent 7-year period (ca. 2000–2006). The approach notably retains information on the spatial distribution of NEE, or the vertical exchange between land and atmosphere of all non-fossil fuel sources and sinks of CO₂, while accounting for lateral transfers of forest and crop products as well as their eventual emissions. The total NEE estimate of a -327 ± 252 TgC yr ^-1 sink for NA was driven primarily by CO₂ uptake in the Forest Lands sector (-248 TgC yr …

Global Public Goods, Governance Risk, And International Energy, Timothy L. Meyer

Scholarly Works

Scholars and commentators have long argued that issue linkages provide a way to increase cooperation on global public goods by increasing participation in global institutions, building consensus, and deterring free-riding. In this symposium article, I argue that the emphasis on the potential of issue linkages to facilitate cooperation in these ways has caused commentators to underestimate how common features of international legal institutions designed to accomplish these aims can actually undermine those institutions’ ability to facilitate cooperation. I focus on two features of institutional design that are intended to encourage participation in public goods institutions but can create the risk …

Arctic Justice: Addressing Persistent Organic Pollutants, Elizabeth Burleson

Elisabeth Haub School of Law Faculty Publications

This article recommends enhanced governance of persistent organic pollutants through incentives to develop environmentally sound, climate friendly technologies as well as caution in developing the Arctic. It highlights the toxicity challenges presented by POPs to Arctic people and ecosystems.

Reliable Science: Overcoming Public Doubts In The Climate Change Debate, Michelle S. Simon

Elisabeth Haub School of Law Faculty Publications

This article will consider the case for instituting a domestic agency that would evaluate the findings from Intergovernmental Panel on Climate Change (IPCC) assessments to improve the credibility and legitimacy of those claims and conclusions for multiple purposes. The proposed agency would consider the robustness of an assessment's conclusions by construing the evidence through the lens of Daubert rather than Frye. Part I will outline the public debate about climate science-what the debate is about and why it exists. Part II will examine the current role of the IPCC-what it is and why it has not been successful in legitimating …

Climate Change And Cercla Remedies: Adaptation Strategies For Contaminated Sediment Sites, Katrina Fischer Kuh

Elisabeth Haub School of Law Faculty Publications

This article considers climate change questions in the context of a particular type of contaminated site--sites with contaminated sediments subject to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Although climate change may impact a variety of waste sites in different ways, even those without sediment contamination, this article focuses on sediment sites so as to frame a more manageable inquiry susceptible to in-depth treatment. The following section, Part II, identifies the vulnerability of contaminated sediment sites to climate change. The section describes sediment contamination, regulatory approaches to remediating contaminated sediments, and how climate change may impact sediment remedies. …

Consideration Of Climate Change In Federal Eiss, 2009-2011, Patrick Woolsey

Sabin Center for Climate Change Law

In recent years, climate change has become an increasingly prominent subject of discussion in EISs. A comparison of agency approaches to EIS scope and methodology shows widely varying treatment of climate change impacts. Agencies differ in the methods used to calculate emissions and assess their significance. In addition, the types of indirect impacts addressed and the extent to which the impacts of climate change on the project are included vary.

Global Public Goods, Governance Risk, And International Energy, Timothy Meyer

Vanderbilt Law School Faculty Publications

Scholars and commentators have long argued that issue linkages provide a way to increase cooperation on global public goods by increasing participation in global institutions, building consensus, and deterring free-riding. In this symposium article, I argue that the emphasis on the potential of issue linkages to facilitate cooperation in these ways has caused commentators to underestimate how common features of international legal institutions designed to accomplish these aims can actually undermine those institutions’ ability to facilitate cooperation. I focus on two features of institutional design that are intended to encourage participation in public goods institutions but can create the risk …

Biophysics, Environmental Stochasticity, And The Evolution Of Thermal Safety Margins In Intertidal Limpets, W. Wesley Dowd, M. W. Denny

Biology Faculty Works

As the air temperature of the Earth rises, ecological relationships within a community might shift, in part due to differences in the thermal physiology of species. Prediction of these shifts – an urgent task for ecologists – will be complicated if thermal tolerance itself can rapidly evolve. Here, we employ a mechanistic approach to predict the potential for rapid evolution of thermal tolerance in the intertidal limpet Lottia gigantea. Using biophysical principles to predict body temperature as a function of the state of the environment, and an environmental bootstrap procedure to predict how the environment fluctuates through time, we create …

Effects Of Biotic Interactions On Climate-Growth Relationships Of Douglas-Fir And Ponderosa Pine, Gunnar Carnwath

Graduate Student Theses, Dissertations, & Professional Papers

Plant processes depend on the interplay between intrinsic characteristics (e.g., photosynthetic capacity) and external variables, such as light, temperature and water availability. However, these factors are often tightly interconnected and vary significantly among species with different life history strategies and within a species across environmental gradients. Moreover, plant-plant interactions may directly affect both intrinsic variables and local environment through direct effects on resource availability and habitat structure. Yet, despite general scientific agreement that the relative effects of abiotic stress and competition are directly linked, relatively little is known about the effects of competitive interactions on climate-growth relationships of trees. This …

Bird Ecology And Conservation In Peru's High Andean Petlands, Richard Edward Gibbons

LSU Doctoral Dissertations

High in the Andes, a unique peatland habitat exists precariously above the frostline and below snowline. These “bofedales”, as they are called in Peru, support an extraordinary avifauna consisting of both boreal and austral migratory species and residents. This ecosystem is predicted to be significantly reduced as a result of global climate change. We endeavored to understand the habitat associations and seasonality of the avian assemblage occurring in these permanent wetlands. Numerous detections of species outside of their documented geographic range provided an opportunity to assess geographic ranges using niche modeling. This novel approach provided insights and inferences for assessing …

The Impact Of An Informal Science Learning Environment On The Environmentally Responsible Behavior Of Adults: A Case Study, Kathryn Ann March

LSU Doctoral Dissertations

Since environmental education’s emergence in America, the field has been primarily focused on increasing environmental awareness, attitudes, knowledge, skills, and behavior. Yet the nation’s overall level of environmental literacy, especially with regard to the performance of environmentally responsible behaviors, continues to be low (Coyle, 2005). Unlike school-based education programs, which only reach a segment of the population, informal sites have the potential to influence learners of many ages and diverse backgrounds (NRC, 2009). Informal science learning environments (ISLEs) have been shown to provide personally meaningful learning experiences and have the potential to impact environmentally responsible decisions and actions (Falk, 2005). …

Climate Change Displacement And Global Governance: A Case Study Of Three Intergovernmental Organizations And The Conflict Between The Member States And Bureaucracy, Andrea C. S. Berringer

LSU Doctoral Dissertations

Climate change is a topic most often broached by environmental scientists and activists and its effects are discussed in terms of animal populations and atmospheric events. However, its direct effect on human life is yet to garner such attention. A changing climate will affect how people are able to use their environment, if at all. Sea level rise and desertification will force a shift in human habitation. How the world seeks to deal with this shift is yet to be seen. The global governance of climate change-induced displacement is currently at the stage of ad hoc development. Legal and conceptual …

Heeding The Clarion Call For Sustainable, Spiritual Western Landscapes: Will The People Be Granted A New Forest Service?, Charles Wilkinson, Daniel Cordalis

Publications

No abstract provided.

Impacts Of Climate Change And Fisheries On The Celtic Sea Ecosystem, Valentina Lauria

Other Faculty of Science and Engineering Theses

Climate change and fisheries have affected marine environments worldwide leading to impacts on ecosystem structure and functioning. However there is clear evidence of spatial variability in the response of these impacts both within and among marine ecosystems. Although several studies have tried to explain the effect of these impacts on marine food webs, it is unclear how they interact, and how they may affect marine ecosystems remains an important unanswered question. This suggests the urgent need for multiple-trophic level and ecosystem-based management approaches to account for both fisheries and climate change impacts at ocean basins across the globe. Marine apex …

Environmental Change And Place-Based Identities: Sponge Fishing In Tarpon Springs, Florida, Michael Suver

USF Tampa Graduate Theses and Dissertations

Abstract

As the environmental consequences of urbanization and climate change become apparent in coastal communities, it has become important to understand how residents of these communities experience and approach their changing environments. This becomes especially significant in places where nature-based livelihoods constitute a major part of the economy. This thesis focuses on the city of Tarpon Springs, located along the Gulf of Mexico in Florida, where sea sponge fishing is an important contributor to the local economy while also being central to place-based tourist and ethnic identities. It seeks to understand how environmental changes in the sea sponge economy will …

Swamp : Walking The Wetlands Of The Swan Coastal Plain ; And With The Exegesis, A Walk In The Anthropocene: Homesickness And The Walker-Writer, Anandashila Saraswati

Theses: Doctorates and Masters

This project is comprised of a creative work and accompanying exegesis. The creative work is a collection of poetry which examines the history and ecology of the wetlands and river systems of the Swan Coastal Plain, and which utilises the practice of walking as a research methodology. For the creative practitioner walking reintroduces the body as a fundamental definer of experience, placing the investigation centrally in the corporeal self, using the physical senses as investigative tools of enquiry. As Rebecca Solnit comments in her history of walking, ‘exploring the world is one of the best ways of exploring the mind, …

Integrated Waste Management As A Climate Change Stabilization Wedge For The Maletese Islands, Clyde Falzon

Masters Theses, 2010-2019

Planet Earth is finding difficulty in dealing with the continuous increase in anthropogenic greenhouse gas emissions. This is leading to change in climate which leads to extensive damage to communities, ecosystems and resources. This study is focussed on the waste sector which is the second largest greenhouse gas emitter in the Maltese islands after the energy (including transport) sector. Moreover, if practiced according to standards, waste management can lead to emission reduction. This work is based on the stabilisation wedges strategy and specifically focused on the integrated waste management wedge. Moreover in this work a life cycle assessment methodology is …

The Role Of Coastal Plant Community Response To Climate Change: Implications For Restoring Ecosystem Resiliency, Hannah June Kalk

Theses

Accelerated sea-level rise and increased intensity of tropical storm events have challenged the conventional approaches to conservation and restoration of coastal ecosystems. In coastal communities, where survival will depend largely on the ability of species to adapt to rapidly shifting conditions or become established farther inland, historic assemblages may be lost. Seed banks may be an important component of resilience and recovery in response to altered inundation regimes, should they contain species able to adapt or migrate inland. This study assess the ability of seed banks to act as ecological buffers to storm surge disturbances and to instill ecological resilience …

Exploring The Effects Of Hypoxia On Sulfate Reducing Anaerobes, Annaliese K. Jones

Senior Honors Projects

Exploring the Effects of Hypoxia on Sulfate Reducing Anaerobes

Annaliese K. Jones

Sponsor: Bethany Jenkins, Cell and Molecular Biology

As a student about to graduate with a degree in Biological Sciences, I find myself faced with the need to find my own independent research interests and scientific voice. As a result of my interests in the fields of both microbiology and ecology, I am drawn to questions surrounding the role and behavior of microorganisms in the environment. With climate change being an issue capturing the attention of a large portion of the scientific community, I have chosen to focus my …