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 20 of 24 for “"wetland loss"”.
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Estuarine Dynamics as a Function of Barrier Island Transgression and Wetland Loss: Understanding the Transport and Exchange Processes
… unable to accrete at a pace comparable to SLR, wetlands will deteriorate and the tidal exchange and tidal prism will further increase. Secondary to hurricanes, winter storms are a primary driver in coastal morphology in this region, and this study shows that wind direction and magnitude, as well …
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Coastal Wetland Dynamics Under Sea-level Rise and Wetland Restoration in the Northern Gulf of Mexico using Bayesian Multilevel Models and a Web Tool
… activities, affects landscapes of coastal wetlands with uncertainties accounted for at the entire northern Gulf of Mexico (NGOM). I developed such a modeling framework – Bayesian multi-level models to study the spatial pattern of wetland loss in the NGOM, driven by relative RSLR, vegetation …
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Estimating the economic cost of sea-level rise
… concentration of capital. As in past studies, wetland loss continues to be dominant for most regions, and the total cost does not decline appreciably where wetland loss remains about the same. The total cost for the United States is about $320 billion (in 1995 U.S. dollars), an estimate …
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Causes of the decline in the loss of vegetated palustrine wetlands in the U.S. 1955 - 2009
… States had lost over 50 percent of its original wetland resources. The U.S. National Wetland Inventory estimates that 95 percent of annual wetland losses since 1955 occurred to palustrine wetlands. The majority of these losses occurred to the three types of palustrine vegetated wetlands: …
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The ecology of two estuarine-dependent tonguefishes, the blackcheek tonguefish (Symphurus plagiusa) and the offshore tonguefish (S. civitatium), in coastal Louisiana
The pattern and process of wetland loss in coastal Louisiana has the potential to influence the distribution and abundance of fishes and macroinvertebrates that utilize inshore estuarine habitat as nurseries during their early life histories. Current management plans designed to stabilize marsh …
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Relative Effects of Landscape Structure Variables, and Interactions with Life-History Traits, on the Abundance and Distribution of Wetland-Dependent Vertebrate Species
Wetland-dependent species are undergoing the largest wildlife population declines worldwide primarily due to habitat loss, but are a relatively understudied ecological group in landscape ecology. The overarching goal of my dissertation is to advance our understanding of the effects of landscape …
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The Influence of Flooding on Contributions of Spartina Alterniflora Roots to Salt Marsh Soil Volume in a Field Setting
Rapid rates of coastal wetland loss in Louisiana are widely recognized. One important question of wetland sustainability is how volumetric contributions of roots to wetland soils vary under the influence of different hydrologic regimes. The research presented here specifically investigates the …
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Investigation of Neotectonic Activity within the Shallow, Unconsolidated Stratigraphy of the Pearl River Delta Area, Louisiana
… areas of southeastern Louisiana in the form of wetland loss and coastal erosion. This study, within the Pearl River Delta Area of Louisiana, applied geomorphologic and stratigraphic methods of analysis to assess whether evidence of recent fault motion is present within the shallow, …
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A Comparative Analysis of the Subsurface Stratigraphic Framework to the Geomorphic Evolution of the Caillou Bay Headland, South-Central Louisiana
… order to locate patterns of shoreline change and wetland loss for the headland. Land loss maps developed were overlain on lithosome contour maps to calculate amounts of land loss overlying each lithosome contour interval. Analysis of results revealed that land loss was not uniform throughout the …
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Faunal Diversity and Richness of Natural, Restored, Dam-Created, and Borrow-Pit Wetlands in the Prairie Pothole Region of Eastern South Dakota
An increasingly large percentage of wetland loss has occurred due to highway development within the last twenty years. In an attempt to compensate for these losses, the Federal Highway Administration has adopted new wetland mitigation policies. To facilitate the implementation of these policies, …
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Wetland mitigation banking in Tennessee: an assessment of three banks performance
… nation as a whole loses nearly 58,000 acres of wetlands. The national goal of both the EPA and the Army Corps of Engineers is to achieve no net loss of wetlands. Wetlands law allows for mitigation of wetland impacts with the implied assumption that the mitigation will adequately compensate for …
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Investigating Nekton Response to Changing Salinities in the Mississippi Sound: An Experimental and Statistical Approach
… Diversion (MBSD), an initiative to combat wetland loss, is also forecasted to lower salinities in the region, increasing the need to better understand responses of commercially and ecologically important species to freshening events. The objective of this study was to characterize effects …
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Estimating occupancy and abundance of shorebirds through aerial surveys in the Illinois river valley
"Shorebirds are one of multiple guilds of wetland birds that have been experiencing population declines over the last 50 years. These species migrate long distances between northern breeding grounds and southern wintering grounds, and many need to stop and refuel along the way. The Illinois River …
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Modeling the impacts of pulsed riverine inflows on hydrodynamics and water quality in the Barataria Bay estuary
Eutrophication and coastal wetland loss are the major environmental problems affecting estuaries around the world. In Louisiana, controlled diversions of the Mississippi River water back into coastal wetlands are thought to be an important engineering solution that could reverse coastal land loss. …
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Below-Ground Food Production in Habitats Utilized by the Rocky Mountain Populations of Greater Sandhill Cranes
… used by RMP cranes in agricultural fields and wetlands across six annual cycle events in 2006 and 2007 (wintering, spring staging, spring stopover, breeding, post-breeding, and fall staging). Below-ground foods were sampled in sandhill crane foraging habitats at three United States Fish and …
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Developing tools to identify factors that limit production in coastal marshes
Marsh loss is a problem in many areas around the world. In Louisiana’s coastal marshes, where Spartina patens is the most common plant, restoration and management seek to slow wetland loss rates that average approximately 77.4 km2/year. To combat the problem, scientists and managers require tools …
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Patterns and Pathways of Wetland Sedimentation and Landscape Change in Coastal Louisiana
<p>Coastal Louisiana wetlands exist in a dynamic physical environment and retracted dramatically in the last century. Here I examine the spatial and temporal variability of this landscape with an emphasis on the interactions between anthropogenic landscape modifications and geological …
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Linking nitrogen biogeochemistry to different stages of wetland soil development in the Mississippi River Delta, Louisiana
Extensive wetland loss and nutrient-enhanced eutrophication occur across the Mississippi River delta and include newly emergent landscapes, in the early stages of ecological succession, and older landscape formations, with fully developed ecological communities. Here I tested how the anthropogenic …
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Shorebird migration in western Kentucky: phenology, habitat use, and possible effects of prey availability
… Little is known, however, about the use of wetlands by migrating shorebirds in Kentucky. During 2004 and 2005, I examined the phenology of migration and habitat use of shorebirds using stopover habitats in Kentucky, and also examined possible relationships between prey availability and …
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Ecohydrology of Natural and Restored Wetlands in a Glacial Plain
<p>More than half of wetland area in the U.S. have been converted to other land use types for agricultural use and development. Limited understanding of ecological services provided to society by wetlands is another reason for the massive wetland loss in the past. Section 404 of the Clean Water Act …
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