Characterization Of Polycyclic Aromatic Hydrocarbons (Pahs) By The Kinetics Of Depuration In Bivalve Molluscs, Mercenaria Mercenaria, John T. Tanacredi Ph.D., C Sato, H Kim
Dr. John T. Tanacredi
The objectives of this study were to examine depuration aspects of polycyclic aromatic hydrocarbons (PAHs) in a hard-shell clam Mercenaria mercenaria, and to characterize PAHs by the depuration kinetics. In this investigation, clams were exposed to artificial sea water containing a mixture of eight PAHs (i.e., naphthalene, fluorene, phenanthrene, flouranthene, pyrene, benz[a]anthracene, chrysene, benzo[a]pyrene) for 48 hours. The clams were then transferred into clean (PAH-free) artificial seawater for release, and sampled at predetermined intervals. The target PAHs were extracted from the clam tissue and quantified by a gas chromatograph equipped with a capillary glass column ...
See You In Court: Around The World In Eight Climate Change Lawsuits, 2018 College of William & Mary Law School
See You In Court: Around The World In Eight Climate Change Lawsuits, Myanna Dellinger
William & Mary Environmental Law and Policy Review
No abstract provided.
Colonialism And Its Aftermaths In Vieques, Puerto Rico: How U.S. Hegemony Led To Contamination, A Superfund Site, And Local Mistrust, Kaya Mark
Scripps Senior Theses
After sixty-two years of U.S. military testing, the small Puerto Rican island of Vieques and its residents continue to fight against ongoing environmental and social effects of U.S. hegemony. Starting with the arrival of the Spanish, then with U.S. occupation and use of Vieques as a military stopover, Viequense residents are used to U.S. governmental presence on their land. Despite the military’s removal from Vieques in 2003, many local residents have a fundamental lack of trust for the U.S. government. Because of this lack of trust and transparency with U.S. governmental actions in ...
Watershed Management Tools: Hazardous Site Case History, Reference Stream Analysis, And Gis Analysis Of Fire Risk, Patrick Doyle
Graduate Student Portfolios
My portfolio explores some tools that are used to protect or assess watershed health and the experiences and lessons I learned during my time in the Environmental Studies program. The first piece in my portfolio is a case study that looks at the history of pollution ad cleanup of the kraft pulp mill along the Clark Fork River. In my study, I look closely at the EPA’s investigation of the site and the community’s reaction to the findings. In my second piece, I describe my field and lab experience working for the Montana Department of Environmental Quality. During ...
A Land Use Regression Model For Explaining Spatial Variation In Air Pollution Levels Using A Wind Sector Based Approach, 2018 Trinity College Dublin, Ireland
A Land Use Regression Model For Explaining Spatial Variation In Air Pollution Levels Using A Wind Sector Based Approach, Owen Naughton, Aoife Donnelly, Paul Nolan, Francesco Pilla, Bruce Misstear, Brian Broderick
Estimating pollutant concentrations at a local and regional scale is essential for good ambient air quality information in environmental and health policy decision making. Here we present a land use regression (LUR) modelling methodology that exploits the high temporal resolution of fixed-site monitoring (FSM) to produce viable air quality maps. The methodology partitions concentration time series from a national FSM network into wind-dependent sectors or “wedges”. A LUR model is derived using predictor variables calculated within the directional wind sectors, and compared against the long-term average concentrations within each sector. This study demonstrates the value of incorporating the relative position ...
The Role Of Environmental Filtering In Structuring Appalachian Tree Communities: Topographic Influences On Functional Diversity Are Mediated Through Soil Characteristics, Julia I. Chapman, Ryan W. Mcewan
Biology Faculty Publications
Identifying the drivers of community assembly has long been a central goal in ecology, and the development of functional diversity indices has provided a new way of detecting the influence of environmental gradients on biotic communities. For an old-growth Appalachian forest, we used path analysis to understand how patterns of tree functional diversity relate to topography and soil gradients and to determine whether topographic effects are mediated through soil chemistry. All of our path models supported the idea of environmental filtering: stressful areas (high elevation, low soil moisture, low soil nutrients) were occupied by communities of low functional diversity, which ...
Water Quality Trends Following Anomalous Phosphorus Inputs To Grand Bay, Mississippi, Usa, 2018 Southern California Coastal Water Research Project
Water Quality Trends Following Anomalous Phosphorus Inputs To Grand Bay, Mississippi, Usa, Marcus W. Beck, Kimberly Cressman, Cher Griffin, Jane Caffrey
Gulf and Caribbean Research
Grand Bay National Estuarine Research Reserve (GBNERR) is a 7500 ha protected area in Jackson County, MS. In 2005, a levee breach at a fertilizer manufacturing facility released highly acidic and phosphate—rich wastewater into the reserve. A second spill occurred in September 2012 following Hurricane Isaac. We used orthophosphate (PO43-) concentrations to categorize the 2 events, post— events, and non—impact periods between the 2 spills. We examined spatial and temporal patterns in nutrients, chlorophyll, pH, and other parameters within and between monitoring stations. After the first event, pH at the Bangs Lake water quality station decreased ...
Regulation Of Radioactive Fracking Waste, 2018 CUNY School of Public Health
Regulation Of Radioactive Fracking Waste, Elizabeth Ann Glass Geltman, Nichole Leclair
Publications and Research
Natural gas extracted form shale reached record production totals in 2015 in the United States and the US Energy Information Administration (EIA) forecasts natural gas production will continue to increase. Wastes from shale gas extraction can contain the radioactive isotopes radium-226 (Ra-226) and radium-228 (Ra-228), which decay further into radon (Rn). Exposure to radon, a form of naturally occurring radioactive materials (NORM), is the leading cause of lung cancer in the United States, after smoking. This article explores how states handle the disposal of technologically enhanced naturally occurring radioactive materials (TENORM) and/or NORM waste from oil and gas operations ...
Developing A Unified Approach To Sustainable Consumption Behaviour: Opportunities For A New Environmental Paradigm, 2018 Dublin Institute of Technology
Developing A Unified Approach To Sustainable Consumption Behaviour: Opportunities For A New Environmental Paradigm, Vivienne Byers, Alan Gilmer
Politicians and national policy makers seek to encourage individuals to engage in a wide range of pro-environmental practices to address both discrete environmental problems and major global challenges such as climate change. Theoretically, the field of behavioural management in environmental consumption which seeks to change holarchic open human systems, is much contested. This paper proposes to develop a synthesized conceptual framework embracing a unified approach that addresses the systematic, structural, and institutional perspectives on how consumption, through public policy initiatives, can be developed and changed to reflect a deeper ecological foundation. This approach considers the debate regarding policy and behavioural ...
Total Mercury Determination In Muscle And Liver Tissue Samples From Brazilian Amazon Fish Using Slurry Sampling, 2018 São Paulo State University
Total Mercury Determination In Muscle And Liver Tissue Samples From Brazilian Amazon Fish Using Slurry Sampling, João Vitor De Queiroz, José Cavalcante Souza Vieira, Izabela Da Cunha Bataglioli, Alis Correia Bittarello, Camila Pereira Braga, Grasieli De Oliveira, Cilene Do Carmo Federici Padilha, Pedro De Magalhães Padilha
Biochemistry -- Faculty Publications
This paper presents a slurry sampling method for total mercury determination by graphite furnace atomic absorption spectrometry (GFAAS) in tissue of fish from the Amazon. The tissue samples were lyophilized and macerated, and then the slurry samples were prepared by putting 20 mg of tissue, added to a solution containing Triton X-100, Suprapur HNO3, and zirconium nitrate directly in sampling vials of a spectrometer. Mercury standard solutions were prepared under the same conditions as the slurry samples. The slurry samples and the mercury standard solutions were sonicated for 20 s. Twenty microliters of slurry samples were injected into the ...
Carbon-Storing Trees And Particulate Matter Reduction In Los Angeles, California, 2018 Walden University
Carbon-Storing Trees And Particulate Matter Reduction In Los Angeles, California, Tanyi Obenson
Walden Dissertations and Doctoral Studies
Air pollution is a major concern in heavily populated cities such as Los-Angeles, California. Particulate Matter (PM) pollution in Hispanic and Black American neighborhoods in Los Angeles tends to be higher than adjacent non-minority areas. Research has indicated that certain carbon-storing trees can be used to reduce PM pollution. The purpose of this qualitative, interview research project was to determine the feasibility of using carbon-storing trees to reduce PM pollution in Hispanic and Black American neighborhoods in Los Angeles. Using an ecological theoretical framework, 10 subject matter experts were interviewed about their knowledge of carbon-storing properties and the feasibility of ...
Use Of An Alternative Natural Weed Suppressant: Effects Of Parboiled Rice Hill Mulch On The Growth Of Container Weeds, 2017 Kennesaw State University
Use Of An Alternative Natural Weed Suppressant: Effects Of Parboiled Rice Hill Mulch On The Growth Of Container Weeds, Amy R. Fields-Taylor, Vanessa Slinger-Friedman
The Kennesaw Journal of Undergraduate Research
The Chattahoochee Nature Center (CNC) is one of the leading educational centers in Georgia about the ecology of the Chattahoochee River. Due to lack of man power, keeping down the weeds in the CNC plant nursery is one of those tasks that often gets left undone. The nursery becomes overgrown with invasive weed species. Understandably, they must sometimes resort to the use of herbicides, such as Roundup®, to keep the hundreds of native and endangered species of plants housed at CNC from being choked out by invasive weeds. This study tests the ability to suppress weed growth by use of ...
Remediation Strategies For Mercury Contaminated Lakes And Reservoirs Within The State Of California, 2017 The University of San Francisco
Remediation Strategies For Mercury Contaminated Lakes And Reservoirs Within The State Of California, Emily Chortek
Master's Projects and Capstones
Mercury is an environmental and public health concern due to its neurodegenerative effects and ubiquitous concentration within the environment. To mitigate these risks and reduce concentrations within the environment, remediation methods are necessary. The purpose of this paper is to investigate and evaluate the efficacy of a number of remediation options for mercury contaminated lakes and reservoirs in the State of California. This paper also identifies a number of challenges associated with the implementation of each method and provides recommendations for environmental managers to use when remediating mercury contaminated lakes. Hypolimnetic oxygenation (HOS) was found to be the least problematic ...
Race, Ethnicity, Income Concentration And 10-Year Change In Urban Greenness In The United States, 2017 University of California, Berkeley
Race, Ethnicity, Income Concentration And 10-Year Change In Urban Greenness In The United States, Joan A. Casey, Peter James, Lara Cushing, William M. Jesdale, Rachel Morello-Frosch
Open Access Articles
Background: Cross-sectional studies suggest urban greenness is unequally distributed by neighborhood demographics. However, the extent to which inequalities in greenness have changed over time remains unknown.
Methods: We estimated 2001 and 2011 greenness using Moderate-resolution Imaging Spectroradiometer (MODIS) satellite-derived normalized difference vegetative index (NDVI) in 59,483 urban census tracts in the contiguous U.S. We fit spatial error models to estimate the association between baseline census tract demographic composition in 2000 and (1) 2001 greenness and (2) change in greenness between 2001 and 2011.
Results: In models adjusted for population density, climatic factors, housing tenure, and Index of Concentration ...
Biodiversity Of Larval And Adult Dragonflies And Damselflies (Odonata) Of Interdunal Wetlands At Saugatuck Harbor Natural Area, 2017 Western Michigan University
Biodiversity Of Larval And Adult Dragonflies And Damselflies (Odonata) Of Interdunal Wetlands At Saugatuck Harbor Natural Area, Devon Volz
The effects of climate change on insects in the United States have yet to be fully understood. Research on the insect populations of Lake Michigan’s interdunal wetlands has been particularly limited. As these vibrant habitats are already at risk of destruction due to increased development, it is vital to have a working knowledge of the species that are living in the habitat. However, to date, there have been no studies on assemblages of interdunal wetlands in Michigan. Examining community compositions is critical to understanding the ecological problems that could occur in the future. This study is the first to ...
Eco-Justice Reformation: Re-Imagining Ecumenical Witness In The Context Of Climate Injustice, 2017 Wilfrid Laurier University
Eco-Justice Reformation: Re-Imagining Ecumenical Witness In The Context Of Climate Injustice, George Zachariah
No abstract provided.
Meeting The Nitrate Reduction Goal: What Will It Take?, 2017 Iowa State University
Meeting The Nitrate Reduction Goal: What Will It Take?, Jamie Benning, Matt Helmers, Mark Licht
Integrated Crop Management Conference
The Iowa Nutrient Reduction Strategy is a science and technology-based framework developed to assess and reduce nutrient loss to Iowa waters and the Gulf of Mexico. The strategy addresses methods and practices to reduce total loads of nitrogen and phosphorus from both municipal and industrial point sources and agricultural nonpoint sources by a combined 45% (INRSSA, 2013). The approach was developed in response to the 2008 Gulf Hypoxia Action Plan that calls for Iowa and other states in the Mississippi River watershed to develop strategies to reduce nutrient loadings to the Gulf of Mexico and ultimately reduce the size of ...
The Iowa Nutrient Reduction Strategy Farmer Survey: Tracking Knowledge, Attitudes, And Behaviors, 2017 Iowa State University
The Iowa Nutrient Reduction Strategy Farmer Survey: Tracking Knowledge, Attitudes, And Behaviors, Laurie Nowatzke
Integrated Crop Management Conference
In 2013, the state of Iowa released the Iowa Nutrient Reduction Strategy (NRS) (http://www.nutrientstrategy.iastate.edu). The NRS is a science and technology-based approach to guide actions that reduce the amount of nutrients delivered to Iowa waterways and the Gulf of Mexico. The NRS was developed through a collaboration between Iowa State University (ISU), the Iowa Department of Agriculture and Land Stewardship (IDALS), and the Iowa Department of Natural Resources, with support from the USDA Agricultural Research Serviceand the USDA Natural Resources Conservation Service (NRCS). The strategy outlines opportunities and recommendations for voluntary efforts to reduce nutrients in ...
Impacts Of 4r Nitrogen Management On Drainage Water Quality, 2017 Iowa State University
Impacts Of 4r Nitrogen Management On Drainage Water Quality, Matthew J. Helmers
Integrated Crop Management Conference
Much of the U.S. Corn Belt is characterized by relative flat, poorly-drained areas which with extensive subsurface drainage, have become some of the most valuable and productive agricultural land in the world. However, this is not without consequences. Nitrate-N loss from these systems is of particular concern due to its potential adverse impacts on both public health and ecosystem function. In addition to the potential local impacts on receiving waters in the Corn Belt, nitrogen loads from the region are suspected as a primary contributor to hypoxia in the Gulf of Mexico. For nearly 30 years Iowa State University ...
An Investigation Of Biological Carbon Sequestration At The Pea Ridge National Military Park, 2017 University of Arkansas, Fayetteville
An Investigation Of Biological Carbon Sequestration At The Pea Ridge National Military Park, Dorine Reed Bower
Theses and Dissertations
The direct correlation between increasing levels of atmospheric CO2 and global temperatures is now irrefutable. A 50% increase in atmospheric CO2 levels from a pre-industrial level of 270 ppm to a present-day level of 405 ppm, has resulted in documented record temperatures and a concomitant rising of sea levels from melting ice caps.
The ability of biological/terrestrial ecological systems to store atmospheric carbon is a viable option in the effort to mitigate the climate impacts of rising anthropogenically-caused greenhouse gas emissions. Components of the vegetation and soils in the Pea Ridge National Military Park (the Park) were examined for ...