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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 26 for “"forested wetland"”.
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An analysis of palustrine forested wetland compensation effectiveness in Virginia
Plans to construct a wetland to replace wetland losses has become a common feature of permit requests. The purpose of this project is to suggest a methodology for quantifying the effectiveness of palustrine forested wetland construction in Virginia. Wetlands constructed by ~ne Virginia Department …
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Biogeochemical Controls on Carbon Fluxes in a Restored Coastal Freshwater Forested Wetland
… of the most important ecosystem services that wetlands provide is carbon sequestration, a regulating service that helps moderate the impact of increased anthropogenic and natural emissions of greenhouse gases like CO2 and CH4. Carbon dynamics in wetlands are influenced by processes that promote …
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Use of ancillary data in a Landsat classification of a forested wetland
Digital Landsat cover-type classifications have often proved less accurate than hoped for, or have been less detailed than needed. Recent research efforts have used additional data to supplement the four bands of Landsat MSS data in an attempt to increase the accuracies of computer classifications. …
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Factors affecting root system response to nutrient heterogeneity in forested wetland ecosystems
… system response to nutrient heterogeneity in forested wetland ecosystems of southeastern United States. Fine root biomass was not correlated with soil nutrient availability within wetland ecosystems, but was related to ecosystem-scale fertility. Root systems generally did not respond to P-rich …
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Determining an Appropriate Organic Matter Loading Rate for a Created Coastal Plain Forested Wetland
Past research indicates that created non-tidal wetlands in the mid-Atlantic region are considerably lower in soil organic matter than native forested hydric soils. However, optimal loading rates for created wetland soil reconstruction have not been rigorously established. Our objective was to …
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Mitigation of harvesting disturbances on a forested wetland in the South Carolina lower coastal plain
… trafficking on the functions and productivity of wetland sites. One study addressed soil compaction while the other addressed soil rutting. Each study consisted of three sites, each containing four trafficked and four untrafficked plots. Four site preparation treatments, one on each disturbance …
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The effect of thresholding a maximum likelihood classifier on the accuracy of a landsat classification of a forested wetland
Although the maximum likelihood classifier is a popular classification technique, there is an inherent problem associated with the 100% classification of a scene. This is because there will inevitably be pixels within a study area that have a low probability of belonging to any of the predefined …
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RADAR MONITORING OF HYDROLOGY IN MARYLAND'S FORESTED COASTAL PLAIN WETLANDS: IMPLICATIONS FOR PREDICTED CLIMATE CHANGE AND IMPROVED MAPPING
Wetlands provide important services to society but Mid-Atlantic wetlands are at high risk for loss, with forested wetlands being especially vulnerable. Hydrology (flooding and soil moisture) controls wetland function and extent but it may be altered due to changes in climate and anthropogenic …
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Litter Decomposition in Created and Adjacent Forested Wetlands of the Coastal Plain of Virginia
… understood function of constructed and natural forested wetlands. This study compared rates of litter mass loss, changes in litter morphology, and associated macroinvertebrate populations in constructed and natural non-tidal wetlands. Two sets of wetlands (constructed vs. natural) were studied …
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Between Swamp and Sea: Agroforestry as Wetland Restoration in Southeast Virginia
… facilitate marsh migration without sacrificing forested wetland or productive value. Observational studies of marsh migration into coastal forests are well documented, though the mechanisms and determinants behind this conversion are complex and have only recently been given attention. I …
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Long-Term (24-Year) Effects of Harvest Disturbances on Ecosystem Productivity and Carbon Sequestration in Tupelo-Cypress Swamps in the Mobile-Tensaw River Delta
… twenty-four years after harvest on two major wetland functions: stand productivity and C storage. This study evaluated the effects of three harvest types that were originally applied in 1986 to a tupelo (Nyssa aquatic)-cypress (Taxodium distichum) forested wetland in the Mobile-Tensaw River …
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Denitrification and greenhouse gas emissions from cultivated and wetland alluvial soils
… practices (BMPs) to reduce NO3 loss and wetlands restoration to remove NO3 through denitrification are critically needed. The objectives of this research were to determine factors controlling denitrification potential of different landscape units in an agricultural watershed and quantify …
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A wetland trafficability hazard index based on soil physical properties and site hydrology evaluations
Harvesting of forested wetlands in the Atlantic and Gulf lower coastal plains has the potential to cause intense site disturbance. Often, as a result of poor pre-harvest planning, silvicultural activities are performed on wetland soils highly susceptible to rutting and puddling. Potential decreases …
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A Vegetation-Based Index of Biotic Integrity for Wetlands of Kentucky
<p>Wetland ecosystems have experienced severe declines across the United States, prompting efforts to assess the status of remaining wetlands and regulate their development. The Clean Water Act and the policy of “No Net Loss” have resulted in a system of permitting and mitigation for impacts to …
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Recovery status of a cypress (Taxodium distichum)-water tupelo (Nyssa aquatica) wetland seven years after harvest disturbance
Research documenting the functional changes of wetlands in response to harvest disturbance has often been limited to initial-response time frames of one or two years. A cypress (Taxodium distichum L. Rich.)-water tupelo ~ aQuatica L.) swamp located in the Mobile-T ensaw River Delta of Southwestern …
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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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Macroinvertebrate Biomonitoring Criteria and Community Composition in Seasonal Floodplain Wetlands of the Upper Missouri River
… within the floodplain. Knowledge of floodplain wetland attributes and their response to anthropogenic disturbances is limited. In this study, I developed a macroinvertebrate index of biotic integrity (M-IBI) that evaluated the effects of disturbances in seasonal floodplain wetlands. I also …
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Movements, Survival, and Habitat Relationships of Snowshoe Hares Following Release in Northeast Ohio
… sites that differed in age of dominant trees and wetland coverage. Hares released during 2000 lost more weight before release (P < 0.001) and had lower condition (P = 0.054) than in 2001. Hares dispersed farther (P < 0.001) from release sites in 2001 (937 ± 52 m) than in 2000 (562 ± 41 m). …
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