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 6 of 6 for “"sediment microbial community"”.
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Impacts of legacy mining on stream structural and functional processes in an urban stream
… biofilm diatoms, macroinvertebrates and the sediment microbial community in addition to investigating the stream from a functional approach, focusing on surface water and sediment nutrient cycling and whole reach stream metabolism. From the structural and functional assessments, the stream …
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The Potential for Eutrophication Mitigation from Aquaculture of the Native Oyster, Crassostrea virginica, in Chesapeake Bay: Quantitative Assessment of an Ecosystem Service
… coupled nitrification-denitrification pathway in sediments as a result of oyster biodeposition. Using 15N and N2/Ar methods to measure N2 production in sediments, encompassing direct denitrification (DNF), coupled nitrification- denitrification, and anaerobic ammonium oxidation (anammox) pathways, …
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Assembly and functioning of microbial communities along terrestrial resource gradients in boreal lake sediments
… initial processing of terrestrial resources by microbial communities at the base of lake food webs remain poorly understood. With this in mind, this thesis aims to advance our understanding of lake sediment microbial community assembly and functioning along abiotic gradients, primarily …
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Dynamic forcing of oxygen, iron, and manganese fluxes at the sediment-water interface in lakes and reservoirs
… such as iron (Fe) and manganese (Mn) from the sediment into the water. However, while the influence of HOx on the water column has been established, little work has been done on how oxygenation affects sediment O₂ uptake (i.e., sediment oxygen demand) and other sediment-water fluxes. In …
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Distribution of Free Marine Viruses of Lower Chesapeake Bay and Their Effects on Life-History Parameters of the Estuarine Copepod <i>Acartia tonsa</i> Dana
… through the water column and 15-25 cm into the sediment at five stations. VLPs were about ten times more abundant in sediment pore water (3.7 x 10<sup>8</sup> VLPs ml<sup>-1</sup>) than in the water column (2.4 x 10<sup>6</sup> bacteria ml<sup>-1</sup>).</p> <p>In the water column, VLP and …
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Impacts of artisanal and large scale gold mining on tropical rivers in West Africa: A case study from the Brong Ahafo Region of Ghana
… on riverine ecology, particularly at biota community levels, remains understudied. This study investigated the impacts of ASGM on the ecology of the Surow River and that of an LSM (the Ahafo mine) on the Subri River between February 2013 and April 2014. Both the Surow and Subri rivers are …