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Articles 1 - 30 of 34
Full-Text Articles in Physical Sciences and Mathematics
Toward A Comprehensive Water Quality Model For The Chesapeake Bay Using Unstructured Grids, Xun Cai
Toward A Comprehensive Water Quality Model For The Chesapeake Bay Using Unstructured Grids, Xun Cai
Dissertations, Theses, and Masters Projects
Chesapeake Bay is one of the most productive ecosystems on the US east coast which supports various living resources and habitat, and therefore has significant impacts on human beings and ecosystem health. Developing the capability of accurately simulating the water quality condition in the Chesapeake Bay, such as seasonal hypoxia, phytoplankton production, and nutrient dynamics, helps to better understand the interactions of hydrodynamical and biochemical processes, and more importantly, to predict conditions under changing climate and human intervention. Currently, most Chesapeake Bay models use structured grids that lack the flexibility for local refinements to fit complex geometry over both large …
Exploring The Effects Of Microplastics On Marine Biota, Meredith Evans Seeley
Exploring The Effects Of Microplastics On Marine Biota, Meredith Evans Seeley
Dissertations, Theses, and Masters Projects
There is mounting evidence that microplastics are a persistent and increasing hazard for aquatic organisms. The effects of microplastics on organisms and ecosystems are complex, however, and may be linked to a wide variety of particle characteristics including size, shape, polymer, additive chemistry, and degree of weathering. Assessing risk is complicated by the fact that many known effects of microplastics are sublethal, and that plastics have been postulated to interact with other stressors, such as pathogens. The work presented here expands our understanding of these complex effects. First, the impacts of microplastics on sedimentary microbial ecosystems and biogeochemical carbon and …
Environmental Justice In The Elizabeth River Watershed: Exploring The Utility Of Environmental Justice Screening Tools, Julianna M. Ramirez
Environmental Justice In The Elizabeth River Watershed: Exploring The Utility Of Environmental Justice Screening Tools, Julianna M. Ramirez
Dissertations, Theses, and Masters Projects
The Environmental Justice (EJ) movement has long highlighted the disproportionate exposure to environmental hazards experienced by Black, Indigenous, People of Color (BIPOC) and low-income communities across the country. Environmental practitioners have recently focused on utilizing EJ screening tools, which combine environmental and social data to visualize vulnerable communities, to begin to address environmental injustice rampant in BIPOC and low-income communities. This project explores EJ theoretical frameworks and the historical context of social oppression and environmental pollution in the Elizabeth River watershed (ERW) of Virginia to: 1) understand the social, political, and economic context behind environmental injustice; and 2) generate goals …
The Development Of Ecological Functions In Created Forested Wetlands, Sean P. Charles
The Development Of Ecological Functions In Created Forested Wetlands, Sean P. Charles
Dissertations, Theses, and Masters Projects
Wetland mitigation has become a 2.4 billion dollar per year industry in the U.S. and in Virginia it leads to the replacement of 77 ha of palustrine forested wetlands (PFWs) per year with mitigation wetlands, including created forested wetlands (CFWs). Mitigation hinges on the idea that compensation wetlands lead to “no net loss of wetland function” when compared to impacted wetlands. We assessed the functions of provision of habitat and biogeochemical functions associated with production of biomass, the retention and removal of nutrients and the accumulation of soil C over 8 years in seven CFWs of approximately 11 and 20 …
The Impacts Of Shoreline Development On Shallow-Water Benthic Communities In The Patuxent River, Md, Cassie D. Bradley
The Impacts Of Shoreline Development On Shallow-Water Benthic Communities In The Patuxent River, Md, Cassie D. Bradley
Dissertations, Theses, and Masters Projects
Natural coastal habitats throughout Chesapeake Bay are increasingly threatened with shoreline modification due to population growth and rising rates of development. The replacement of these natural coastlines with hardened structures such as seawalls (bulkheads) and stone revetments (riprap) not only compromises vegetation at the land-water interface, but also can influence several elements of local aquatic food webs. Effects of these alterations have been well-studied with respect to fish assemblages and intertidal communities, particularly in conjunction with larger-scale watershed development, and recently, interest has shifted toward investigation of the effects of shoreline development on subtidal benthic infaunal communities.
This study evaluated …
Net Microbial Activity, Vegetation Dynamics, And Ecosystem Function In Created And Natural Palustrine Forested Wetlands In Southeastern Virginia, Usa, Christian A. Hauser
Net Microbial Activity, Vegetation Dynamics, And Ecosystem Function In Created And Natural Palustrine Forested Wetlands In Southeastern Virginia, Usa, Christian A. Hauser
Dissertations, Theses, and Masters Projects
No abstract provided.
Assessing The Functional Status Of Created Wetlands In Eastern Virginia Via A Soil And Vegetative Developmental Trajectory, Sara Elizabeth Kreisel
Assessing The Functional Status Of Created Wetlands In Eastern Virginia Via A Soil And Vegetative Developmental Trajectory, Sara Elizabeth Kreisel
Dissertations, Theses, and Masters Projects
No abstract provided.
Water Quality In Headwater Streams: A Test Of Best Management Practices, Jonathan Worth Holley
Water Quality In Headwater Streams: A Test Of Best Management Practices, Jonathan Worth Holley
Dissertations, Theses, and Masters Projects
No abstract provided.
The Impact Of Drainage Ditches On Salt Marsh Flow Patterns, Sedimentation And Morphology: Rowley River, Massachusetts, Lynsey E. Lemay
The Impact Of Drainage Ditches On Salt Marsh Flow Patterns, Sedimentation And Morphology: Rowley River, Massachusetts, Lynsey E. Lemay
Dissertations, Theses, and Masters Projects
Salt marshes along many tidal systems in New England have been ditched since colonial times. These ditches have been thought to help control mosquito populations and increase salt marsh hay production by improving water drainage from the marsh. Although these ditches are prominent geomorphic features, little quantitative work has focused on how these man-made ditches may alter marsh hydrology and geomorphology. This study attempts to quantify the ways in which ditches alter sediment and water transport pathways and how that affects the overall morphology and surface geology. This study also addresses treatment affects on sedimentation from fertilization and fish removal …
Tidal Wetland Contributions To Fecal Coliform Loads In Shellfish Growing Waters By Analysis Of Model Prediction Discrepancy, Jie. Huang
Dissertations, Theses, and Masters Projects
Fecal contamination in estuaries has become an increasing concern worldwide. The use of wetlands for wastewater treatment has expanded due to their natural ability to improve water quality by removing suspended sediments, nutrients, and fecal bacteria. In general, most of the removal occurs through deposition and accumulation in the wetland substrate. This would suggest that wetlands are effective filters for fecal coliform transported from terrestrial environments to surface waters. It has also been hypothesized, however, that wetlands may be an intermittent source of fecal coliform in tidal systems as a result of wildlife deposition and /or accumulation from terrestrial sources. …
Ecosystem Gas Exchange In Natural And Created Tidal Salt Marshes Of Tidewater, Virginia, Molly Mitchell Roggero
Ecosystem Gas Exchange In Natural And Created Tidal Salt Marshes Of Tidewater, Virginia, Molly Mitchell Roggero
Dissertations, Theses, and Masters Projects
No abstract provided.
An Evaluation Of The Accuracy Of The Growing Season Used For Wetland Delineation In Se Virginia, Rebecca L. Arenson
An Evaluation Of The Accuracy Of The Growing Season Used For Wetland Delineation In Se Virginia, Rebecca L. Arenson
Dissertations, Theses, and Masters Projects
No abstract provided.
Use Of Remote Sensing To Identify Essential Habitat For Aeschynomene Virginica (L) Bsp, A Threatened Tidal Freshwater Wetland Plant, Elizabeth M. Mountz
Use Of Remote Sensing To Identify Essential Habitat For Aeschynomene Virginica (L) Bsp, A Threatened Tidal Freshwater Wetland Plant, Elizabeth M. Mountz
Dissertations, Theses, and Masters Projects
No abstract provided.
Comparison Of The Fate Of Dissolved Organic Matter In Two Coastal Systems: Hog Island Bay, Va (Usa) And Plum Island Sound, Ma (Usa), Tami L. Lunsford
Comparison Of The Fate Of Dissolved Organic Matter In Two Coastal Systems: Hog Island Bay, Va (Usa) And Plum Island Sound, Ma (Usa), Tami L. Lunsford
Dissertations, Theses, and Masters Projects
No abstract provided.
The Development Of A Water Quality Model In Baltimore Harbor, Back River, And The Adjacent Upper Chesapeake Bay, Hui Liu
Dissertations, Theses, and Masters Projects
No abstract provided.
Oyster Reef Restoration In Virginia: Broodstock Addition & Nutrient Exchanges, Laurie Ann Sorabella
Oyster Reef Restoration In Virginia: Broodstock Addition & Nutrient Exchanges, Laurie Ann Sorabella
Dissertations, Theses, and Masters Projects
No abstract provided.
Bioremediation Of Tributyltin Contaminated Sediment Using Spartina Alterniflora In A Created Tidal Wetland, Britt-Anne Anderson
Bioremediation Of Tributyltin Contaminated Sediment Using Spartina Alterniflora In A Created Tidal Wetland, Britt-Anne Anderson
Dissertations, Theses, and Masters Projects
No abstract provided.
Targeting Wetland Preservation Areas For Compensatory Mitigation Utilizing A Gis Protocol, Lynn M. Dancy
Targeting Wetland Preservation Areas For Compensatory Mitigation Utilizing A Gis Protocol, Lynn M. Dancy
Dissertations, Theses, and Masters Projects
No abstract provided.
Potential For Population Regulation Of The Zebra Mussel, Dreissena Polymorpha, In The Hudson River, Larry C. Boles
Potential For Population Regulation Of The Zebra Mussel, Dreissena Polymorpha, In The Hudson River, Larry C. Boles
Dissertations, Theses, and Masters Projects
No abstract provided.
An Analysis Of The Effects Of Sea Level Rise On The Salt Marshes Of Cape Hatteras National Seashore, North Carolina, Christopher Robert Perle
An Analysis Of The Effects Of Sea Level Rise On The Salt Marshes Of Cape Hatteras National Seashore, North Carolina, Christopher Robert Perle
Dissertations, Theses, and Masters Projects
No abstract provided.
A Comparison Of Three Wetland Evaluation Methods In Their Assessment Of Nontidal Wetlands In The Coastal Plain Of Virginia, Melissa Claire Chaun
A Comparison Of Three Wetland Evaluation Methods In Their Assessment Of Nontidal Wetlands In The Coastal Plain Of Virginia, Melissa Claire Chaun
Dissertations, Theses, and Masters Projects
No abstract provided.
Error Analysis In Tidal Wetland Inventory Change Detection: Comparison Of Historical Mapped Wetlands Of The Achilles Quadrangle Between 1976 To 1989, Stacy A. C. Nelson
Error Analysis In Tidal Wetland Inventory Change Detection: Comparison Of Historical Mapped Wetlands Of The Achilles Quadrangle Between 1976 To 1989, Stacy A. C. Nelson
Dissertations, Theses, and Masters Projects
No abstract provided.
An Analysis Of Wetland Total Phosphorus Retention And Watershed Structure, Megan K. Greiner
An Analysis Of Wetland Total Phosphorus Retention And Watershed Structure, Megan K. Greiner
Dissertations, Theses, and Masters Projects
No abstract provided.
The Effect Of A One-Meter Sea-Level Rise On Tidal Wetlands In Gloucester County, Virginia, Paula Lindsey Hill
The Effect Of A One-Meter Sea-Level Rise On Tidal Wetlands In Gloucester County, Virginia, Paula Lindsey Hill
Dissertations, Theses, and Masters Projects
No abstract provided.
Land Use And Wetland Function: A Sensitivity Analysis Of The Vims Nontidal Wetland Functional Assessment Method, Martha Craig
Land Use And Wetland Function: A Sensitivity Analysis Of The Vims Nontidal Wetland Functional Assessment Method, Martha Craig
Dissertations, Theses, and Masters Projects
No abstract provided.
Frna Coliphages As A Viral Indicator Of Sewage Pollution In An Estuary, David Miller Boyd
Frna Coliphages As A Viral Indicator Of Sewage Pollution In An Estuary, David Miller Boyd
Dissertations, Theses, and Masters Projects
No abstract provided.
The Standing Stock Of Organic Matter In A Man-Made Brackish Marsh And Its Resource Management Implications, Pamela Anne Mason
The Standing Stock Of Organic Matter In A Man-Made Brackish Marsh And Its Resource Management Implications, Pamela Anne Mason
Dissertations, Theses, and Masters Projects
No abstract provided.
A Method For Evaluating The Long-Term, Cumulative Impacts Of Tidal Marsh Alterations: The York River System, A Case Study, Andrew W. Zacherle
A Method For Evaluating The Long-Term, Cumulative Impacts Of Tidal Marsh Alterations: The York River System, A Case Study, Andrew W. Zacherle
Dissertations, Theses, and Masters Projects
No abstract provided.
Influence Of Marinas On Hydrocarbons In Sediments Of Two Estuarine Creeks, Evangelos Alexandros Voudrias
Influence Of Marinas On Hydrocarbons In Sediments Of Two Estuarine Creeks, Evangelos Alexandros Voudrias
Dissertations, Theses, and Masters Projects
No abstract provided.
Recolonization Of Meiobenthos In Oiled Azoic Subtidal Muddy Sands Of The York River Estuary, Virginia, Daniel M. Alongi
Recolonization Of Meiobenthos In Oiled Azoic Subtidal Muddy Sands Of The York River Estuary, Virginia, Daniel M. Alongi
Dissertations, Theses, and Masters Projects
No abstract provided.