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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 2650 for “"lakes"”.
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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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Paleolimnology of selected Precambrian Shield lakes /
… crop. The top 20 cm of sediment of 3 ,Shield lakes was then investigated using close interval (1 cm) analyses of diatoms, Mallomonas scales, pollen grains and sedimentary phosphorus. Found and Jake Lake are adjacent to Highway 60, whereas Delano Lake has been undisturbed and was used as a …
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Cyclone climatology of the Great Lakes
Cyclones are an important feature of the Great Lakes region with significant impacts on ice cover, thermal structure, water quality, aquatic life, shipping, and shoreline property. For this research, a historical cyclone dataset was constructed for the period 1900 to 1990. This dataset was used to …
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Regenerative Business Practices within Queenstown Lakes District
… capacity of tourism businesses in the Queenstown Lakes District to address the climate crisis, in line with the objectives of the district’s Destination Management Plan (DMP) and goal to become a regenerative visitor economy. The research aimed to explore practical interventions that enable …
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Bluegill Reproductive Characteristics in Nebraska Sandhill Lakes
… biology was evaluated in two Nebraska Sandhill lakes, 323-ha Pelican Lake in Cherry County and 38-ha Cozad Lake in Brown County, during 1998. Catch per unit effort of stock-length bluegills in trap nets did not differ between lakes (P=0.19). Proportional stock density was significantly higher …
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Analyzing lakes in the time frequency domain
The central aim of this thesis is to demonstrate the benefits of innovative frequency-based methods to better explain the variability observed in lake ecosystems. Freshwater ecosystems may be the most threatened part of the hydrosphere. Lake ecosystems are particularly sensitive to changes in …
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MALLARD NESTING ECOLOGY IN THE GREAT LAKES
… programs. Past decisions in management of Great Lakes mallard (Anas platyrynchos) populations were based largely on paradigms established in the mid-continent because regional data were lacking. Recent sensitivity analyses from the Great Lakes Mallard Study show that population growth (i.e., λ) …
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MALLARD NESTING ECOLOGY IN THE GREAT LAKES
… programs. Past decisions in management of Great Lakes mallard (Anas platyrynchos) populations were based largely on paradigms established in the mid-continent because regional data were lacking. Recent sensitivity analyses from the Great Lakes Mallard Study show that population growth (i.e., λ) …
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Ascomycetes From North Temperate Lakes in Wisconsin
… study of freshwater ascomycetes in seven lakes in northern Wisconsin was carried out. These lakes are part of the Long Term Ecological Research (LTER) project and have been the subject of limnological studies since the early 1900's. Our knowledge of freshwater ascomycetes is fairly recent …
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Synthetic ecology : revisiting Mexico City's lakes project
Mexico City was founded 700 years ago on man made islets in the middle of a lake. Today, it faces a contradictory situation were water is running scarce, but simultaneously the city runs the risk of drowning in its own sewage. A series of past projects -all addressing the hydrological imbalance- …
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The Eutrophic Status of Ten Central Iowa Lakes
… the eutrophic status of small central Iowa lakes. The purpose of this study is to (1) determine the eutrophic status of ten central Iowa lakes; (2) compare and contrast any differences between the lakes located within the Wisconsin Glacial drift and those lakes located outside of this area; …
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Ecology of Fish Communities in Nebraska Sandhill Lakes
… on the fish communities in Nebraska Sandhill lakes. I selected 30 lakes and measured fish community characteristics, invertebrate populations, and habitat in all lakes. I also evaluated angler impact by using creel data and studied populations in three lakes that were closed to fishing. …
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Climate impact on phytoplankton blooms in shallow lakes
… by multiple anthropogenic influences on lakes. This thesis contributes to a better understanding of climate impacts on freshwater phytoplankton, which forms the basis of the food chain and decisively influences water quality. The analyses were, for the most part, based on a long-term data …
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The Biogeochemistry of Carbon Isotopes in Local Lakes
… processes on carbon isotopes in local lakes. Crystal Lake is a small but deep glacial lake (12.5 acres, 11.9 meters). The study shows that during thermal stratification, the heaviest carbon can be found in the epilimnion near the surface, where photosynthesis dominates the …
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Vertical heat transport mechanisms in lakes and reservoirs
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Civil Engineering.
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