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Articles 451 - 467 of 467
Full-Text Articles in Environmental Indicators and Impact Assessment
Geochemical Assessment Of Sediment Flux In A Sediment Core From A Tidal Flat In A Tropical Estuary, Olumide Ajulo
Geochemical Assessment Of Sediment Flux In A Sediment Core From A Tidal Flat In A Tropical Estuary, Olumide Ajulo
Master's Theses or Doctor of Nursing Practice
Sediment flux in estuaries is influenced by both natural processes and anthropogenic activities. Understanding the historical and current trends in sediment flux inputs and geochemical composition are essential for evaluating the estuary’s response to natural and human-induced changes and for developing effective environmental management strategies. The tropical Wouri Estuary in Cameroon receives water and sediment inputs from three main rivers draining urban, industrial, and agricultural areas, as well as different rock terrains. The complex inputs into the estuary can significantly affect sediment flux, consequently impacting the ecosystem. Thereby making an understanding of the temporal variations in sediment inputs in the …
Draft Final Butte Priority Soils Operable Unit (Bpsou) Unreclaimed Sites: Ur-03 Site Remedial Action Work Plan (Rawp), Pioneer Technical Services, Inc.
Draft Final Butte Priority Soils Operable Unit (Bpsou) Unreclaimed Sites: Ur-03 Site Remedial Action Work Plan (Rawp), Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Berkeley Pit And Discharge Pilot Project Quarterly Pilot Project Report Third Quarter 2024, Atlantic Richfield Company, Mark Thompson
Berkeley Pit And Discharge Pilot Project Quarterly Pilot Project Report Third Quarter 2024, Atlantic Richfield Company, Mark Thompson
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Investigating The Thermal Stratification Patterns Of A Shallow Polymictic Boreal Shield Lake And The Effectiveness Of Models In Predicting Shallow Lake Thermal Profiles, Matthew Roberts
Theses and Dissertations (Comprehensive)
Thermal stratification is a core process of lakes which plays a critical role in shaping the ecological dynamics of lakes, influencing major processes like nutrient cycling and oxygen availability. For shallow polymictic lakes, thermal stratification patterns present some unique differences due to the complex and variable nature of these lakes. In this thesis, I examined thermal stratification in a shallow polymictic lake in northwestern Ontario during the ice-free season of 2019 to investigate the frequency, duration, and driving factors of thermal stratification. The lake underwent 146 separate stratification events, with a median duration of 2 hours per event, with a …
Comprehensive Analysis Of Environmental Particulate Matter: Chemical Composition And Microbial Assessment, Uyen T. L. Le
Comprehensive Analysis Of Environmental Particulate Matter: Chemical Composition And Microbial Assessment, Uyen T. L. Le
Theses and Dissertations (Comprehensive)
Rapid industrialization and population growth have contributed to a decline in air quality, with particulate matter (PM) posing particular concern. PM originates from both natural and human sources and often contains toxic chemicals and microorganisms, including potential pathogens. Inhalation of PM is linked to respiratory and cardiovascular diseases, underscoring the need to characterize better its chemical and biological composition in understudied region - Waterloo, Ontario, Canada. The present thesis is a culmination of three main parts. Part 1 will describe the use of the dithiothreitol (DTT) assay to quantify the oxidative potential of PM through DTT consumption of redox-active field …
An Economic And Production Analysis Of Seaweed Farms In California And The Pacific Northwest, Brian Donovan
An Economic And Production Analysis Of Seaweed Farms In California And The Pacific Northwest, Brian Donovan
Cal Poly Humboldt theses and projects
Since the early 2010s, the seaweed aquaculture industry has steadily expanded in the United States, with states like Alaska, Maine, Hawaii, and Connecticut leading the way in the development of this emerging sector. However, information gaps remain concerning certain aspects of the domestic seaweed aquaculture industry. The purpose of this study was to examine the status of the seaweed aquaculture industry along the West Coast of the United States; specifically in the states of California, Oregon, and Washington. Seaweed farmers in these states were invited to voluntarily complete surveys asking important production, economic, and commercial questions regarding their operations. Data …
The Relationship Between Plant Density And Microplastic Concentration In The Water In Lake Bemidji, Mn, Arian Garcia
The Relationship Between Plant Density And Microplastic Concentration In The Water In Lake Bemidji, Mn, Arian Garcia
Journal of Earth and Life Science
Microplastics, plastic particles smaller than 5 mm, are an increasing environmental threat, particularly due to their widespread distribution and toxicity. While much research has focused on larger freshwater and marine ecosystems, the presence and impacts of microplastics in smaller inland lakes remain less understood. This study investigates the relationship between plant density and microplastic concentrations in Lake Bemidji, a smaller freshwater lake. A total of 30 water samples were collected across varying vegetation conditions, ranging from open water (0%) to 90% plant coverage. Microplastics were identified and categorized into six morphological types: fibers, fragments, films, spheres/beads, and foam. The samples …
Does Depth Affect Zebra Mussel Length In Scalp Lake?, Zanden Mellen
Does Depth Affect Zebra Mussel Length In Scalp Lake?, Zanden Mellen
Journal of Earth and Life Science
Since its first sighting in 1996, zebra mussels Dreissena polymorpha have been confirmed in hundreds of Minnesota lakes. Not only were they found in lakes, but they are also found in rivers too. With lack of effective treatments to impede their spread, zebra mussels continue to colonize new areas causing ecological as well as economic harm. The objective of this study was to see if there was a relationship between a zebra mussel length and the depth, they are found using shell length (mm) and depth (cm). The comparison of zebra mussel length and depth was done by performing a …
The Signal Of Airplane Combustion In Soil At A Small Airport In Ohio, Rachel Engels
The Signal Of Airplane Combustion In Soil At A Small Airport In Ohio, Rachel Engels
Williams Honors College, Honors Research Projects
Leaded gas has been banned for automobile use in the interest of public health since 1996. However, leaded gas is still used for small piston aircraft so the engine can run safely. To investigate potential environmental impacts of leaded gas, 90 soil samples were taken from around a small airport in Ohio. Soil elemental composition was measured by X-ray fluorescence (XRF), soil organic content determined by Loss-on-Ignition (LOI), and soil ferrimagnetic content measured by magnetic susceptibility. There is an unmistakable airplane fuel combustion signal in the soil at the ends of the runway, where aircraft wait to take off on …
Cover Crops Can Reduce Greenhouse Gas Emissions From No-Till Maize In Southern Brazil: Insights From A Long-Term Field Experiment, Guilherme Rosa Da Silva, Adam J. Liska, Cimélio Bayer
Cover Crops Can Reduce Greenhouse Gas Emissions From No-Till Maize In Southern Brazil: Insights From A Long-Term Field Experiment, Guilherme Rosa Da Silva, Adam J. Liska, Cimélio Bayer
Adam Liska Papers
Brazil is one of the countries that has the most agricultural area under no-till (NT) management. This research study aims to evaluate life-cycle greenhouse gas (GHG) emissions from maize (M) grain production in agroecosystems that used different cover crops under NT management in southern Brazil. The data for this study were from a long-term 41-year field experiment in southern Brazil. The long-term experiment evaluated the effects of fallow (F) and cover crops (oat (O), vetch (V), cowpea (B), pigeon pea (P), and lablab (L)) on nitrous oxide and methane emissions and soil carbon (C) sequestration in maize agroecosystems. Five cropping …
Complexity, Polycentricity, And Climate Change: An Embedded, Multi-Level Case Study Of A Climate Meta-Network, Timothy Staub
Complexity, Polycentricity, And Climate Change: An Embedded, Multi-Level Case Study Of A Climate Meta-Network, Timothy Staub
Antioch University Dissertations & Theses
The earth is in crisis, and without urgent, systemic, and collective global action to address the emerging threat of climate change, we will continue to see catastrophic events impacting humanity, threatening our very survival in many regions of the world. Temperatures will rise, ice shelves will melt, seas will rise, crops will fail, water scarcity from drought and new weather patterns will increase and spread, wildfires will accelerate, and food and water insecurity, violence, and the largest human migration in history will ensue. These climate crises will displace over 1.2 billion people by 2050 at a rate currently exceeding 21.5 …
Seeds In A Pluriverse: Visakha Society For The Protection And Care Of Animals Inclusive Praxis Toward Self-Determined Just Socio-Ecological Territories, Priya Tallam
Antioch University Dissertations & Theses
My dissertation focuses on my thesis question: How might an NGO’s grassroots efforts in urban Visakhapatnam, India, propagate living justly with animals we encounter and severely Othered humans, beyond attitudes of guardianship, mitigating universalized harms to nature and society? In a transdisciplinary approach examining grassroots programs, my phenomenological study breaks down an animal advocate’s assertive practices of—inclusivity and decolonialized lived norms, which persistently transcend cultural antagonisms of caste, ability, gender, sex, class, and form/species—toward creating just pluriversal multispecies communities in Visakhapatnam. Universalized urbanization across the planet has driven irreversible socio-ecological transformation marked by record ecosystem decline. Sustaining the urban via …
Canary In The Alpine: Shifts In Snowbed Plant Communities Over Time In The Adirondack Mountains Of New York, Katie Rhodes
Canary In The Alpine: Shifts In Snowbed Plant Communities Over Time In The Adirondack Mountains Of New York, Katie Rhodes
Antioch University Dissertations & Theses
Due to their unique species diversity and vulnerability, alpine snowbed communities have the potential to serve as early detection or ‘canary’ communities that can inform scientific understanding of the timing and physical manifestation of a changing alpine ecosystem. In the summer of 2008, fifteen alpine snowbed vegetation community transects over 5 mountain summits were established and studied in the High Peaks Wilderness Complex within the Adirondack State Park by the New York Natural Heritage Program. Each transect was 5 meters long and encompassed five 1x1 meter subplots. These transects were relocated and surveyed again in the summer of 2024 in …
Final Horseshoe Bend Effluent Line (Hbel) Discharge Structure Surface Enhancements Work Plan, Pioneer Technical Services, Inc.
Final Horseshoe Bend Effluent Line (Hbel) Discharge Structure Surface Enhancements Work Plan, Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Draft Final Silver Bow Creek Conservation Area Repository Data Gap Data Summary Report (Dsr), Pioneer Technical Services, Inc.
Draft Final Silver Bow Creek Conservation Area Repository Data Gap Data Summary Report (Dsr), Pioneer Technical Services, Inc.
Silver Bow Creek/Butte Area Superfund Site
This Silver Bow Creek Conservation Area (SBCCA) Repository Data Gap Data Summary Report (DSR) presents the results from the soil sampling activities conducted as specified in the SBCCA Repository Data Gap Quality Assurance Project Plan (QAPP) (referred to herein as the SBCCA Repository Data Gap QAPP; Atlantic Richfield Company, 2024). The information presented in this DSR includes laboratory analytical results from subsurface soil sampling collected from Buffalo Gulch (BG), Butte Reduction Works (BRW), Diggings East (DE), and Northside Tailings (NST) within the SBCCA. This DSR was prepared by Pioneer Technical Services, Inc. (Pioneer), 1101 S. Montana Street, Butte, Montana 59701 …
Revised Final Multi-Pathway Residential Metals Abatement Program Plan, Atlantic Richfield Company, Butte Silver Bow
Revised Final Multi-Pathway Residential Metals Abatement Program Plan, Atlantic Richfield Company, Butte Silver Bow
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
The Coral Porites Lutea As A Regional And Local Proxy For Sea Surface Temperature In Hong Kong, And The Effects Of Typhoons On Proxy Accuracy, Brenna E. Bell
The Coral Porites Lutea As A Regional And Local Proxy For Sea Surface Temperature In Hong Kong, And The Effects Of Typhoons On Proxy Accuracy, Brenna E. Bell
CMC Senior Theses
Proxies related to the climate have been used as a method to observe long-term changes occurring underwater that span long before we had the capability to measure environmental characteristics. Porites corals have been used as sea surface temperature (SST) proxies due to annual cyclicity in their growth process and mineral composition. As the climate differs globally, it is important to ensure that proxies are accurate regardless of location to measure changes in climate. This study examines Porites lutea corals as an SST proxy in the region of Hong Kong. Potential local differences in SST proxy calibrations within the surrounding waters …