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Showing 1 to 20 of 28 for “"Wetland Vegetation"”.
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Hydraulic Resistance due to Emergent Wetland Vegetation
Models to estimate hydraulic resistance due to vegetation in emergent wetlands are crucial to wetland design and management. Hydraulic models that consider vegetation rely on an accurate determination of a resistance parameter such as a friction factor or a bulk drag coefficient. At low Reynolds …
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Characterization of urban wetland vegetation and management practices
<p>Urban wetlands are important ecosystems that moderate flooding risks and improve water quality. Vegetation is a key component of urban wetlands; plants promote sedimentation, play critical roles in biogeochemical cycling, and provide food and habitats for other organisms. My research focuses on …
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Surface water flow resistance due to emergent wetland vegetation
The key to a successful wetland design is duplicating the hydroperiod of the desired wetland type. Dense wetland vegetation affects surface water flow rates by increasing flow resistance. Prior research represented the vegetation as individual stems; however, many wetland species grow in clumps. …
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Evaluating the influence white-tailed deer have on wetland vegetation types with respect to wetland birds at Shiawassee National Wildlife Refuge, Saginaw, Michigan
… could cause biologists concern when managing wetlands as suitable habitat for migratory waterfowl since high levels of herbivory can negatively impact plant communities. There is a knowledge gap on how deer use of wetland vegetation types may affect bird use of those same wetlands. Our …
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Effects of Introduced Muskrat Populations on Emergent Vegetation in South Dakota Wetland
… of water level are the main forces controlling wetland vegetation cover and composition on a long term basis. IN the absence of artificial water control structures, properly managed muskrat populations are the most natural, long term means of regulating wetland vegetation. Reduction of prairie …
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The implications of fynbos phytogeography for wetland photoassessment
… of the environmental condition of lowland wetlands in the Fynbos biome of the South Western Cape of South Africa. A field survey and analysis of freshwater wetland vegetation across the Cape coastal lowlands (below 200m a.s.l.) was undertaken in the present study to explore the potential to …
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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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Effect of Ingestion by Alligator Snapping Turtles (Macrochelys Temminckii) on Seeds of Riparian Vegetation
… fish but also consumes large amounts of vegetation including seeds of common persimmon (Diospyros virginiana), tupelos (Nyssa sp.), willow oak (Quercus phellos), and pecan (Carya illinoensis). Captive specimens of M. temminckii were fed samples of the above-mentioned seeds to assess how …
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Effects of Landscape Age and Salinity on Plant Community Composition and Productivity in Opportunistic and Constructed Wetlands in the Athabasca Oil Sands Region, Alberta
Wetlands comprise 65% of the Athabasca Oil Sands Region (AOSR) surface mineable area and thus support diverse flora (approximately 400 species in Alberta). Due to increased anthropogenic land disturbance activities such as bitumen extraction, reclamation of surface mineable areas will also …
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Relationships Among Aquatic Macroinvertebrates, Endangered Waterbirds, and Macrophytes in Taro Lo'I At Hanalei National Wildlife Refuge, Kauai, Hawaii
… the island of Kauai provides yearround critical wetland habitat for five endangered waterbirds (EWBs) and supports nearly one-third of the remaining taro loi cultivated in the Hawaiian archipelago. This study focuses on the use patterns of this agricultural crop by two of these EWBs, the Hawaiian …
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Influence of plant species, location, and seasonality on rhizosphere bacterial communities in freshwater wetlands
… been shown to vary according to differences in wetland vegetation. Owing to the complexity of factors influencing soil microbial community structure, a greater knowledge of the relationship between rhizosphere microbial communities and different types of plant species will lead to a deeper …
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Location, location: Factors influencing greenhouse gas fluxes from the Mississippi Delta agricultural region
… landscape: farmland, riparian zone, and wetland habitat. This study assessed gas emission variability from the Mississippi Delta agricultural landscape and explored the effects of hydrology and hydrophytic vegetation on gas emissions.</p><p>Gas collection chambers were utilized to make …
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Soil Genesis and Vegetation Response to Amendments and Microtopography in Two Virginia Coastal Plain Created Wetlands
Wetlands serve important ecosystem functions such as carbon sequestration but are often affected by disturbances like urban development, agriculture, and road building. For wetlands created to mitigate losses, it is important that the ecosystem functions successfully replicate those of natural …
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Assessing Coastal Plain Wetland Composition using Advanced Spaceborne Thermal Emission and Reflection Radiometer Imagery
Establishing wetland gains and losses, delineating wetland boundaries, and determining their vegetative composition are major challenges that can be improved through remote sensing studies. In this study, we used the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) to separate …
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Distinguishing the hydrologic regimes and vegetation of fens and wet meadows in the Rocky Mountains
… in the Rocky Mountains are groundwater fed wetlands that are infrequent on the landscape but critical for the support of biodiversity and ecosystem functions. Organic vs. mineral soil layer classifications, hydrologic regime and vegetation indicators have been used to distinguish fens from …
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The effects of hydrology and vegetation on microbial community structure and soil function in the sediments of freshwater wetlands
In wetland soils, hydrology is considered to be one of the primary factors shaping wetland function and microbial community structure, but plant-soil interactions are also important mechanisms affecting microbial nutrient transformations. The research presented here considered the interactive …
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Habitat Characteristics of Refuge Wetlands and Taro Lo'I Used By Endangered Waterbirds At Hanalei National Wildlife Refuge, Hawai'i
… I studied two major habitat types (refuge wetlands and taro lo’i) used by these endangered waterbirds (EWBs) as well as wetland vegetation and EWB response to moist-soil management at HNWR. Furthermore, the links are discussed between habitat conditions that occur during the taro …
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Enhancement of Floral Species Richness in Glaciated Prairie Temporary Wetlands
… semipermanently flooded Prairie Pothole Region wetlands frequently recover plant species richness resembling undisturbed conditions. However, plant species richness in temporarily flooded wetlands often recovers poorly due to colonization by aggressive undesirable species. This study was …
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A 210,000-year reconstruction of subtropical climates from Fern Gully Lagoon, North Stradbroke Island (Minjerribah), Australia
… identified (Chapter 2). • A chronology for a new wetland sediment record from subtropical Fern Gully Lagoon, using radiocarbon (14C) and optically stimulated luminescence age determination as well as estimated hiatus locations as priors for Bayesian agedepth modelling (Chapter 3). • Scanning …
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