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- W2465180472 abstract "Corbin, Jennifer Ann M.S. May 2004 Resource Conservation Effects of Atmospheric Deposition on Water Quality in High Alpine Lakes of Grand Teton National Park, Wyoming Chairperson: Scott W. Woods ^ Atmospheric deposition is the primary cause of acidification in lakes and streams in the United States. Mountainous watersheds have an especially low buffering capacity for the nitrogen-based acidifying compounds in atmospheric deposition because o f their sparse vegetation, short growing season, poor soil development and the presence of extensive areas of exposed bedrock. Twelve high-elevation lakes in Grand Teton National Park (GRTE), Wyoming, were sampled to determine the sensitivity of these lakes to acidification, and to understand the relationship between lake water chemistry and basin characteristics. Samples were analyzed for major anions and cations, ANC, alkalinity, conductivity, pH, DOC, total P, and total N. Step-wise multiple linear regression was used to associate water chemistry with basin characteristics, and to identify the independent variables that exert a strong influence on the association. Discriminant analysis was used to identify which variables make a significant contribution to the classification of lake sensitivity. The results indicate that many of the high elevation lakes in GRTE are sensitive to acidification, with seven of the twelve lakes having ANC concentrations < lOOpeq L ' Lakes in basins with granitic and/or metamorphic bedrock are the most sensitive, particularly when the basin contains a high proportion of young (Holocene) debris. Lakes with basins that are at least partially underlain by limestone are the least sensitive to acidification, regardless of the presence of young debris. Granite and limestone served as the best predictors for solute concentrations with young debris and steep slopes playing significant roles for most solutes especially major base cations, pH, and acidity. The regression model for ANC was an excellent predictor for buffering capacity and explained 86.5% of the variance. Glacier dissolution and the amount of talus in GRTE study basins may be responsible for seasonal increases in NO3 concentrations in glacier-fed lakes, which in turn decreases the ANC. Additional monitoring is required in order to provide more information on long-term effects of atmospheric deposition on water quality in GRTE high elevation lakes." @default.
- W2465180472 created "2016-07-22" @default.
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- W2465180472 date "2004-01-01" @default.
- W2465180472 modified "2023-09-27" @default.
- W2465180472 title "Effects of atmospheric deposition on water quality in high alpine lakes of Grand Teton National Park Wyoming" @default.
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