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The Influence Of Geology And Other Environmental Factors On Stream Water Chemistry And Benthic Invertebrate Assemblages, John R. Olson
The Influence Of Geology And Other Environmental Factors On Stream Water Chemistry And Benthic Invertebrate Assemblages, John R. Olson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Determining if a stream has been degraded by human activities requires knowing what that stream’s natural water quality and freshwater species composition would likely be without any alteration. However stream natural conditions vary greatly from stream to stream, making predicting natural conditions difficult. To determine natural stream conditions, I developed models to predict natural stream water chemistry at individual streams across the western USA. Specifically, the models predict a stream’s electrical conductivity (a measure of the amount of solids dissolved in water), acid neutralization capacity, and concentrations of calcium, magnesium, sulfate, total phosphorus, and total nitrogen. These models predict chemistry …
Integration Of Water-Column And Benthic Processes And Their Effect On Dissolved Oxygen Fluctuations In Small Northern Utah Streams, Ruba A. Mohamed
Integration Of Water-Column And Benthic Processes And Their Effect On Dissolved Oxygen Fluctuations In Small Northern Utah Streams, Ruba A. Mohamed
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Dissolved oxygen (DO) is an important element for aquatic organisms as it is used for respiration by most organisms. Certain concentrations of DO are required in aquatic ecosystems depending on the type and needs of the aquatic organisms. In general, DO concentrations less than 5 mg/L stress many types of aquatic organisms including fishes. In order to maintain DO concentration above the stress level, respiration is one of the factors that should be maintained by controlling the excess growth of aquatic plants. Many factors cause the outbreak of plant growth, including abundance of nutrients and presence of sun light. In …