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 83 for “"Limnology"”.
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Limnology of Selected South Dakota Lakes
Physical, chemical, and biological aspects of 45 lakes in South Dakota were studied from July 1965 to July 1967. Maximum water temperature at the surface reached 28 C. Most of the lakes studied exhibited continuous circulation except when ice covered. Thermocline formation was observed in six of …
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Limnology of Three Farm Ponds in South-Central South Dakota
Physical, chemical, and biological aspects of three farm ponds in south-central South Dakota were studied from June 1964 until December 1965. Maximum water temperature at the surface reached 25.2 C, while water temperatures at the bottom of the ponds were about 2 to 4C lower than the surface. Light …
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The physical limnology and sedimentology of Miller Lake, Martin River Glacier, south-central Alaska
<p>Miller Lake is an ice-walled lake located on the terminus of the Martin River Glacier, south-central Alaska. It has an area of 1.36 km<sup>2</sup> and a mean depth of 25 meters. The lake basin was formed by the coalescence of several ice sinkholes and is characterized by extremely uneven bottom …
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The chemical limnology of Lake Bonney, Antarctica, with emphasis on trace metals and nutrients
Chemical parameters of Lake Bonney, southern Victoria Land, Antarctica, were closely monitored during the 1973-74 and 1974-75 austral summers using marine analytical techniques and the method of standard additions. Results were at variance with reports of several previous investigators. Inorganic …
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Studies of Mountain Lake, Virginia with particular reference to physical limnology and profundal bottom fauna
The present paper summarizes observations made on Mountain Lake, Virginia during 1961, 1962, and 1963. It includes data on the annual cycle of physical and chemical events occurring in the lake, and will serve as a point of departure for future, more specialized studies there. Observations made on …
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Applications of Reservoir Limnology Theory and Steady-State Modeling to Eutrophication Management in Beaver Lake, Arkansas
<p>Reservoir limnology theory predicts that phytoplankton biomass (PB) is greatest in riverine-transition zones and least in lacustrine zones leading to an inverse pattern in water clarity. These theoretical patterns were utilized to create a statistical model of chlorophyll-a (Chl-a), an indicator …
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Chemical limnology, algal growth potential, and nutrient limitation factors of the Upper New River, Virginia, and predictions concerning trophic status for the proposed Blue Ridge reservoirs
Waters in the upper New River basin are well oxygenated, soft, bicarbonate poor, and relatively low in dissolved solids content, Water quality appears to be generally good, although concentrations of heavy metals present are often in excess of recommended water quality standards. Algal growth …
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The ecology of some urban-impacted coastal vleis on the Cape Flats near Cape Town, with special reference to phytoplankton periodicity
… vleis of the Cape Peninsula. This aspect of the limnology of the Cape Flats vleis has received only scant attention by other researchers (over 40 years ago), and no comprehensive studies of their seasonal phytoplankton periodicities had been attempted. The paucity of information regarding the …
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Nutrient load analysis of Lago de Yojoa, Honduras
… study seem to point out that much about tropical limnology is unknown. Lake Yojoa appears to be a mesotrophic lake with nitrogen as the limiting nutrient. However, further field evaluation of the limiting nutrient and nutrient loadings is recommended in order to provide information for better …
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Limnological and paleolimnological investigations of environmental change in three distinct ecosystem types, Canadian High Arctic
… techniques. First, I explore the limnology and diatom ecology along a gradient of bioclimatic zones on Melville Island in the western High Arctic. Lakes and ponds located in the most lushly vegetated zone were significantly different from those elsewhere on the island, both in …
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Application of statistical learning theory to plankton image analysis
A fundamental problem in limnology and oceanography is the inability to quickly identify and map distributions of plankton. This thesis addresses the problem by applying statistical machine learning to video images collected by an optical sampler, the Video Plankton Recorder (VPR). The research is …
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Fishes of the Big Sioux River
An understanding of the fishes and limnology of a river is essential to the effective management of the river. The climate, soils, and agricultural practices in eastern South Dakota create unusual characteristics in rivers draining that area. One of the principal rivers of the area is the Big Sioux …
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Differential Diffusion of Scalars in Sheared, Stratified Turbulence
… A survey of the literature in oceanography and limnology revealed that differential diffusion can be significant in many parts of the world's oceans and lakes.
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The intertidal and shallow subtidal food web of sub-antarctic Marion Island
… of ornithology, plant ecology, mammalogy and limnology. Marine biological research has been relatively neglected and at the outset of the present project the only work available on the Marion Island littoral fauna, apart from various taxonomic reports, was that of De Villiers (1976) who …
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The hydrological and limnological characterization of two Canadian water catchments sensitive to anthropogenic influences: Crawford Lake, Ontario and Old Crow Flats, Yukon
… changes on local hydrology, geochemistry, and limnology. Crawford Lake is a small meromictic lake near the Niagara Escarpment, whose bathymetry and wind-protected shores impede seasonal turnover, maintaining density stratification across the chemocline. Chemical and isotopic analysis identified …
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The Effect of Water Chemistry on the Properties of Iron Particles and Aqueous Iron Suspensions Derived From the Oxidation of iron(II)
… of iron chemistry, corrosion, mineralogy, and limnology. Despite an overwhelming abundance of available information, iron control and water discoloration in drinking water systems remain poorly understood. In addition, very little practical information on iron removal processes and the removal …
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Genomic adaptation to a century of environmental change in zooplankton from the Canadian Shield
… 1 provides an overview of key concepts in limnology and paleoecology, presents the commonly accepted timeline of Bythotrephes invasion of North America, and reviews current knowledge about the genomics and adaptation potential of Daphnia. Chapter 2 applies standard palaeoecological methods, …
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Application of statistical learning theory to plankton image analysis
A fundamental problem in limnology and oceanography is the inability to quickly identify and map distributions of plankton. This thesis addresses the problem by applying statistical machine learning to video images collected by an optical sampler, the Video Plankton Recorder (VPR). The research is …
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Identifying Optimal Sites for Aquaculture in Southern Ontario Aggregate Pit Lakes: A Sustainable Post-Mining Land-Use Alternative
… (PMLU) in pit lakes must carefully consider the limnology, geography, and technical attributes of each site. We propose the implementation of aquaculture as an innovative and sustainable PMLU strategy in pit lakes. With proper management, aquaculture creates a positive environmental, economic and …
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