Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"freshwater marsh"”.
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Periphyton-nutrient dynamics in a gradient-dominated freshwater marsh ecosystem.
In this study, the factors influencing the development of a nutrient availability gradient in a wetland ecosystem and the subsequent controls to, and feedbacks from, the structure and function of the periphyton community were investigated. Field surveys, field experiments, and a laboratory …
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Application of disturbance theory to assess impacts associated with a three-dimensional seismic survey in a freshwater marsh in southwest Louisiana
… aspects of disturbance in a coastal wetland marsh in southern Louisiana. A literature review approached disturbance ecology from both practical and theoretical perspectives and assessed its applicability to developing broad predictive models. However, specific knowledge of environmental …
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The combined effects of salinity and sulfide on the growth and physiology of the freshwater marsh plant Pancium hemitomon J.A. Schultes
… response to saltwater intrusion into coastal freshwater wetlands is governed by the combined effects of increased salinity and porewater sulfide concentrations. I conducted a series of experiments to address the primary hypothesis that growth of Panicum hemitomon is adversely affected by an …
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Soil Buoyancy as a Potential Indicator of Hurricane Susceptibility in Louisiana Marshes
… destroy large expanses land in coastal Louisiana marsh. Research shows that freshwater marsh with organic soils experience increased destruction during hurricanes compared to other marsh. A relevant question surfaces, do some restoration projects create marsh similar to marshes that are more …
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Assessment of Growth Response and Patterns of Biomass Allocation by Panicum hemitomon Schultes: Implications for Thick-mat Floating Marsh Creation and Restoration
… associated with restoring thick-mat floating marsh. Initially, Panicum hemitomon growth response was assessed in conjunction with manipulated nutrient availability and hydrology. Next, I assessed Panicum hemitomon growth response in conjunction with a suite of substrate and mat or containment …
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Depositional History of Thousand Acre Marsh From Geophysical and Sedimentological Analyses
… the recent depositional history of Thousand Acre Marsh. Analyses of these data revealed the role of Thousand Acre Marsh as a record keeper of subsurface sediments and the effects of adjacent environments, North Inlet Marsh system, Winyah Bay estuary, river migration and North Island spit, on the …
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Accumulation of sediment and radionuclides in tidal marshes of the Murderkill River Estuary, Delaware
… and rates of sediment accumulation and tidal marsh accretion in the Murderkill River estuary, Delaware, with special emphasis placed on changes in accumulation rates and sediment physical properties associated with historical land-use practices, such as mosquito ditching. Over 90% of United …
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Stratigraphy, sedimentology, and depositional environments of the Hell Creek Formation (Late Cretaceous) and adjacent strata, Glendive area, Montana
… with shale. Dinosaur, crocodile, turtle, fish, freshwater invertebrate, and terrestrial plant fossils including leaves and rootlets are common in the Hell Creek.</p> <p>Sandstones are interpreted to be point bar deposits of meandering distributary channels. Sandy siltstones are natural levee …
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Marsh-Exported Dissolved Organic Matter Fate in Estuaries
… ocean color, and light attenuation. While marshes are largely considered sinks for carbon due to their high productivity and low soil carbon degradation rates, laterally they are sources of carbon as optically and chemically distinct DOM to surrounding aquatic ecosystems; these inputs are …