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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 63 for “"aquatic vegetation"”.
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Interactions between currents and the spatial structure of aquatic vegetation
Vegetation is present in nearly all aquatic environments, ranging from meandering streams to constructed channels and rivers, as well as in lakes and coastal zones. This vegetation grows in a wide range of flow environments as well, from stagnant water to highly turbulent flows dominated by waves …
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The role of aquatic vegetation on oscillatory flows and sediment transport
… wetlands along with their ecological services. Aquatic vegetation drives morphological changes by modifying flow and sediment transport within and around vegetated regions. The lack of accurate suspended sediment predictors for vegetated oscillatory flows compromise our capabilities for the …
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Interactions among flow, sediment deposition and aquatic vegetation in a channel
Aquatic vegetation is commonly present in rivers in many forms. This thesis consists of two studies, which examine the flow structure around a patch of emergent, rigid vegetation in a laboratory channel. The vegetation patch is represented by an array of circular cylinders in a staggered …
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The influence of submerged aquatic vegetation on trophic relationships of largemouth bass
Aquatic vegetation is considered a nuisance in many lakes and reservoirs supporting largemouth bass populations, and control (eradication) of vegetation is often undertaken. Yet, the relationship between submerged aquatic vegetation and adult largemouth bass, from a trophic standpoint, is poorly …
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Selection and Use of Aquatic Vegetation by Migratory Waterfowl in North Central Texas
Assessment of aquatic plant selection by waterfowl has been conducted during the winters of 1997-2000 on 49 0.2-0.79 ha research ponds in north central Texas. Ponds were categorized by dominant plant species into eight habitat types. Census with waterfowl species identification were performed to …
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Water Flow and Sediment Texture as Co-Varying Submersed Aquatic Vegetation (SAV) Habitat Requirements
… as co-varying habitat parameters of submerged aquatic vegetation (SAV) in the Chesapeake Bay. An outdoor mesocosm experiment was conducted to test the response of SAV (Zostera marina and Ruppia maritima) to combinations of water flows and sediment grain sizes characterized by sediment …
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The Effect of Grass Carp Introduction on Aquatic Vegetation and Existing Fish Populations in Two Small Prairie Lakes
… in 2.3 hectare Prior Lake in South Dakota, aquatic vegetation coverage and height in the water column were significantly lower (P<0.005). During the same two year period, triploid grass carp did not significantly reduce aquatic vegetation coverage or height in the water column in 11.4 …
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Hydrodynamic and transport phenomena at the interface between flow and aquatic vegetation : from the forest to the blade scale
From the canopy scale to the blade scale, interactions between fluid motion and kelp produce a wide array of hydrodynamic and scalar transport phenomena. At the kilometer scale of the kelp forest, coastal currents transport nutrients, microorganisms and spores. But, kelp forests exert a drag force …
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Bridging gaps between numerical and physical modeling of aquatic vegetation: experimental bias, near-bed hydrodynamics, and sediment-induced turbulence modulation
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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SUBMERGED AQUATIC VEGETATION IN A LOW-VISIBILITY LOW-SALINITY ESTUARY IN NORTH CAROLINA: IDENTIFYING TEMPORAL AND SPATIAL DISTRIBUTIONS BY SONAR AND LOCAL ECOLOGICAL KNOWLEDGE
The rapid loss of Submerged Aquatic Vegetation (SAV) across the globe has prompted state and federal agencies to conduct SAV inventories and develop monitoring programs, which are vital to the conservation and management of ecosystems. Due to advances in optical remote sensing technologies, the …
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Ecology of the Tropical Freshwater Turtle Rhinoclemmy's Funerea in Caribbean Costa Rica
… 1990 to 1992. Adult R. funerea were the dominant aquatic turtle and occupied lotic habitats ranging from clearcut areas with abundant aquatic vegetation to primary rainforest devoid of aquatic vegetation, while juveniles were terrestrial forest dwellers. Food habits were almost totally herbivorous …
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Establishing Patterns in Vegetation Associations of the Fountain Darter Etheostoma fonticola in the San Marcos and Comal Rivers of Texas
Aquatic vegetation provides many services for aquatic habitats and fish communities. The Fountain Darter Etheostoma fonticola, found only in spring systems of the San Marcos and Comal rivers in central Texas, is reported to associate with vegetation for feeding, reproduction, and refuge. …
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Spectral Identification of Wild Rice (Zizania palustris L.) Using Indigenous Knowledge and Landsat Multispectral Data
… of wild rice (Zizania palustris L.) from other aquatic vegetation growing on area lakes of the Leech Lake Native American reservation in northern Minnesota. Leech Lake is located within the Mississippi River Headwaters drainage ecosystem and contains some of the largest natural stands of wild …
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Spectral Identification of Wild Rice (Zizania palustris L.) Using Indigenous Knowledge and Landsat Multispectral Data
… of wild rice (Zizania palustris L.) from other aquatic vegetation growing on area lakes of the Leech Lake Native American reservation in northern Minnesota. Leech Lake is located within the Mississippi River Headwaters drainage ecosystem and contains some of the largest natural stands of wild …
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Habitat selection and movements of diploid and triploid grass carp in a large reservoir
… fish introduced in North America to control aquatic vegetation, has become an increasing ecological threat to aquatic ecosystems they invade. Grass Carp have the potential to cause declines and alterations in aquatic vegetation communities, which in turn can have negative impacts on native …
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Population Dynamics of Largemouth Bass and Panfish in South Dakota Ponds
… p=0.01). Seven environmental factors (i.e., aquatic vegetation coverage, specific conductance, Secchi disk transparency, surface area, maximum depth, total alkalinity, turbidity) were measured to determine the relationship between largemouth bass density and environmental variables in the …
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Interaction among vegetation and morphology in channelized rivers
The presence of aquatic vegetation on riverbed and embankments influences flow structure and consequently flow resistance, sediment transport, morphology, and ecology. These influences would lead to a hydraulic diversity, which is a key ingredient of physical habitat in streams. According to this …
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Buffalo Bayou oxygen balance and stream protection analysis
… a wide variety or large population of fish and aquatic vegetation. The low oxygen concentrations are largely due to the in-stream degradation of sewage discharged into the Bayou. This study seeks to assess the current water quality of the Bayou, and to determine the impact of point discharges, …
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Relation of Habitat to Fish Community Characteristics in Small South Dakota Impoundments
… impoundments was positively correlated with aquatic vegetation coverage and Secchi disk transparency. The objectives of my research were tri-fold: 1) to quantify the available aquatic habitat in 24 small South Dakota impoundments, 2) to investigate the use of geographic information system …
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