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 17 of 17 for “"Submerged aquatic vegetation"”.
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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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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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Water Flow and Sediment Texture as Co-Varying Submersed Aquatic Vegetation (SAV) Habitat Requirements
… texture 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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Linkages between Marsh Fragmentation, Prey Availability, and Blue Crab (<i>Callinectes sapidus</i>) Abundance and Mortality
… As marsh is lost, it creates the opportunity for submerged aquatic vegetation (SAV) colonization and establishment in newly created open water areas. Blue crabs, <em>Callinectes sapidus</em>, use both marsh edge and SAV habitat during the juvenile stages and support one of the largest fisheries in …
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Blade dynamics and flux measurements for model seagrass blades in waves and currents
… on the flux of nutrients to the blade surface of submerged aquatic vegetation. To isolate the physical mechanisms from biological processes, model seagrass blades constructed from low-density polyethylene (LDPE) film were used as a laboratory proxy. In accordance with previous studies of LDPE, the …
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A Field and Modeling Assessment of Methyl Mercury Accumulation in an Engineered Retention Pond
… hypolimnetic accumulation was increased submerged aquatic vegetation. This research indicates that small, shallow lakes have the capacity for MeHg accumulation and should be evaluated when determining MeHg transport and export in a watershed.</p>
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Effect of Fragmentation and Habitat Type on Coastal Nekton in Mississippi
… 2015. Nekton were sampled in adjacent patches of submerged aquatic vegetation and emergent vegetation using a 1 m<sup>2</sup> throw trap. Marsh patch fragmentation was quantified using aerial pictures taken with a GoPro camera secured to the end of a 20ft pole. Points around the patch were …
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On the life history, systematics and ecology of Ruppia maritima L. (Potamogetonaceae) in lower Chesapeake Bay
… marina L. (Zosteraceae) form an important submerged aquatic vegetation community. Research in Chesapeake Bay has focused primarily on Zostera marina. Ruppia maritima occurs abundantly in large monospecific stands as well as in mixed stands with Zostera marina. Recent surveys have shown that …
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Fish and mammals of the lower Calaveras River, Stockton, CA
… with changes in season and percent coverage of submerged aquatic vegetation (SA V). Bluegill and redear sunfish abundances were positively correlated. Largemouth bass and redear sunfish abundances were positively related to the percentage of SA V and to changes in season. Presence of mammals was …
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Pedogenesis, Inventory, and Utilization of Subaqueous Soils in Chincoteague Bay, Maryland
… fan flat, storm-surge washover fan slope, and submerged headland. Previously established soil-landscape models were evaluated and utilized to create a soils map of the area. Soil profile descriptions were collected at 163 locations throughout Chincoteague Bay. Pedons representative of major …
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Changes in Wetland Conditions and Wetland Plant Communities in the Prairie Pothole Region After 50 Years
… imagery. Additionally, I conducted quadrat-based vegetation surveys within 4 wetland zones (i.e., wet meadow, shallow marsh, deep marsh, and open water) to examine changes in species composition, frequency, abundance, and to document progression of invasive plant species (e.g., Typha, Phalaris …
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Phosphorus fate and management on the Somerset Levels and Moors Ramsar ditch systems
… these conditions undergo a shift from primarily submerged aquatic vegetation to algae or duckweed dominance, leading to excessive shading and anoxic conditions. Phosphorus, from both point (e.g., wastewater treatment works) and diffuse (largely agricultural runoff) sources, is currently the …
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Mapping and assessing ecosystem threat status of South African kelp forests
… the mid-2000s. The novel approach extracts the Vegetation Index from kelp forests using advanced multi-resolution Sentinel-2 (A and B) satellite imagery. Using Geographic Information Systems, spectral bands 4 (RED) and 8 (NIR) (10 m resolution) were utilized to calculate Normalised Difference …
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Modeling Wetland Use By Spring-Migrating Lesser Scaup (Aythya affinis) in Eastern South Dakota
… efforts showed that amphipod abundance and submerged aquatic vegetation (SAV) explained an appreciable amount of variation (64%) in scaup use. At the landscape scale, scaup wetland use was positively associated with landscapes that had high proportions of semipermanent wetlands and …
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Rivers Hydromorphological Characterization from High Resolution Remotely Sensed Data
… correction method. Moreover, the efficacy of vegetation indices (VIs) is examined for making distinction among the densities of submerged aquatic vegetation (SAV) using either above-water or retrievals of bottom reflectances. This research benefits, for the first time, from three different …